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1. Interspecific Hybridization in Trifolium

Author:
J. Katznelson
Source:
Crop science 1967 v.7 no.4 pp. 307-310
ISSN:
0011-183X
Subject:
Trifolium subterraneum; annuals; backcrossing; flowering; hybrids; interspecific hybridization; males; parents; seeds
Abstract:
... The interspecific relationships among several Trifolium spp. in the section Calycomorphum were studied. Crosses involving T. israeliticum, T. globosum, and T. pauciflorum failed to produce hybrid seed. Crosses among T. subterraneum, T. eriosphaerum, and T. pilulare gave varying results. Complete interspecific sterility was most common; however, 3 F₁ plants (1 plant from the T. eriosphaerum ✕ T. su ...
DOI:
10.2135/cropsci1967.0011183X000700040007x

2. Agronomic Performance and Nature of Gene Effects in Progenitor Species-Derived Genotypes of Tobacco

Author:
S. Oupadissakoon; E. A. Wernsman
Source:
Crop science 1977 v.17 no.6 pp. 843-847
ISSN:
0011-183X
Subject:
Nicotiana sylvestris; Nicotiana tabacum; additive gene effects; agronomic traits; backcrossing; chemical composition; cultivars; flowering; flue-cured tobacco; genes; genotype; germplasm; heterosis; inbreeding depression; interspecific hybridization; leaves; models; plant height
Abstract:
... An investigation was conducted to determine the nature of genetic effects in segregating populations produced by crossing selected progenitor species-derived tobacco (Nicotiana tabacum L.) lines to the tobacco cultivar used in the original interspecific hybridization. Two genetically stable tobacco lines developed from interspecific crosses of N. tabacum ✕ N. sylvestris Speg. and Comes and N. taba ...
DOI:
10.2135/cropsci1977.0011183X001700060006x

3. Agronomic, Chemical, and Smoke Characteristics of Flue-cured Tobacco Lines with Different Levels of Total Alkaloids

Author:
James F. Chaplin; L. G. Burk
Source:
Agronomy journal 1984 v.76 no.1 pp. 133-136
ISSN:
0002-1962
Subject:
Nicotiana tabacum; backcrossing; cigarettes; cultivars; dihaploidy; flavor; flowering; flue-cured tobacco; leaves; nicotine; nornicotine; parents; physicochemical properties; plant height; reducing sugars; smoke; taste
Abstract:
... Total alkaloids (predominately nicotine) are important constitutents in flue-cured tobacco (Nicotiana tabacum L.). Due to varying nicotine levels in cigarettes, it is of interest to see what effect varying alkaloid levels in tobacco have on certain agronomic and chemical characteristics of the cured leaf. Experiments were conducted at two locations to develop lines of flue-cured tobacco with diffe ...
DOI:
10.2134/agronj1984.00021962007600010032x

4. Inheritance of photoperiod-induced flowering in three photoperiodic lines of Aeschynomene americana L

Author:
Deren, C.W.; Quesenberry, K.H.
Source:
Theoretical and applied genetics 1989 v.78 no.6 pp. 825-830
ISSN:
0040-5752
Subject:
Aeschynomene americana; backcrossing; flowering; epistasis; genetic engineering; genetic techniques and protocols; photoperiod; genetic variation; inheritance (genetics); reciprocal crosses; Florida
DOI:
10.1007/BF00266665
PubMed:
24226013

5. Inheritance of Heat Tolerance during Pod Set in Cowpea

Author:
K. O. Marfo; A. E. Hall
Source:
Crop science 1992 v.32 no.4 pp. 912-918
ISSN:
0011-183X
Subject:
backcrossing; Vigna unguiculata; flowering; hybrids; heat tolerance; genotype; inheritance (genetics); heritability; selection criteria; pods; California
Abstract:
... The productivity of cowpea (Vigna unguiculata (L.) Walp.] can be reduced substantially by hot weather during flowering. Inheritance and heritability of tolerance to heat during reproductive development were studied to develop efficient methods for breeding improved cultivars. Heat tolerant (‘Prima’ and TVu 4552) and heat sensitive (Barnbey 23, ‘Magnolia’ and 7964) cowpea genotypes were chosen for ...
DOI:
10.2135/cropsci1992.0011183X003200040015x

6. Somatic hybridization between Solanum tuberosum and species of the S. nigrum complex: Selection of vigorously growing and flowering plants

Author:
K. Horsman; J.E.M. Bergervoet; E. Jacobsen
Source:
Euphytica 1997 v.96 no.3 pp. 345-352
ISSN:
0014-2336
Subject:
DNA; Solanum nigrum; Solanum tuberosum; backcrossing; diploidy; flowering; genotype; greenhouses; hybrids; introgression; kanamycin; plant breeding; potatoes; somatic hybridization; tetraploidy
Abstract:
... Fusion experiments were performed between diploid (2n = 2x = 24) or tetraploid (2n = 4x = 48) potato genotypes and four species of the Solanum nigrum complex, namely S. nigrum (2n = 6x = 72), S. villosum (2n = 4x = 48), S. chenopodioides (2n = 2x = 24) or S. americanum (2n = 2x = 24 and 2n = 6x = 72). All five accessions of the S. nigrum-species were successfully hybridized with at least one of th ...
DOI:
10.1023/A:1003038419126

7. Successful backcrosses of somatic hybrids between Sinapis alba and Brassica oleracea with the Brassica oleracea parent

Author:
Nothnagel, T.; Budahn, H.; Straka, P.; Schrader, O.
Source:
Plant breeding 1997 v.116 no.1 pp. 89-97
ISSN:
0179-9541
Subject:
Sinapis alba; Brassica oleracea; somatic hybridization; intergeneric hybridization; backcrossing; cytoplasmic inheritance; mitochondrial DNA; chromosome number; introgression; flowering; abnormal development; chloroplast DNA; chromosome pairing
DOI:
10.1111/j.1439-0523.1997.tb00981.x

8. Morphological characterization of modified flower morphology of three novel alloplasmic male sterile carrot sources

Author:
Linke, B.; Nothnagel, T.; Borner, T.
Source:
Plant breeding 1999 v.118 no.6 pp. 543-548
ISSN:
0179-9541
Subject:
cytoplasmic male sterility; backcrossing; flowering; morphogenesis; Daucus carota; flowers; stamens; phenotypic variation; wild relatives; plant morphology; cytoplasmic inheritance
Abstract:
... Three novel sources of cytoplasmic male sterility (CMS) in carrot are characterized by altered flower phenotypes. Flowers were classified into subtypes, according to stamen (and petal) modification. Flower anatomy was investigated by light microscopy to describe organ modification and to specify the timing when morphology begins to deviate. Early stages of floral development were defined in fertil ...
DOI:
10.1046/j.1439-0523.1999.00402.x

9. Rapid flowering Nicotiana tabacum L

Author:
McDaniel, C.N.
Source:
Sexual plant reproduction 1999 v.12 no.2 pp. 123-124
ISSN:
0934-0882
Subject:
backcrossing; flowering; phenology; Nicotiana tabacum; plant genetic resources; genetic engineering; genotype; selfing; life cycle (organisms)
DOI:
10.1007/s004970050181

10. Successful first and second backcrosses of S. nigrum (+) S. tuberosum somatic hybrids with both Solanum parents

Author:
Horsman, K.; Fratini, R.; Huigen, D.J.; Jacobsen, E.
Source:
Sexual plant reproduction 1999 v.12 no.3 pp. 144-151
ISSN:
0934-0882
Subject:
Solanum nigrum; Solanum tuberosum; somatic hybridization; progeny; tetraploidy; seeds; pollination; ovules; ovule culture; vigor; flowering; germination; Phytophthora infestans; disease resistance; interspecific hybridization; backcrossing; genotype; fungal diseases of plants
DOI:
10.1007/s004970050185

11. Genotype × Environment Interactions in Maize Hybrids from Temperate or Highland Tropical Origin

Author:
C. Giauffret; J. Lothrop; D. Dorvillez; B. Gouesnard; M. Derieux
Source:
Crop science 2000 v.40 no.4 pp. 1004-1012
ISSN:
0011-183X
Subject:
Zea mays; backcrossing; breeding programs; cold tolerance; corn; disease resistance; flowering; genotype; genotype-environment interaction; germplasm; grain yield; heritability; introduced species; leaf area; leaves; marker-assisted selection; plant breeding; temperate zones; temperature; tropical plants
Abstract:
... Exotic germplasm is often used in maize (Zea mays L.) breeding programs. However, the occurrence of genotype × environment interactions (GEIs) may mask the potential utility of exotic material. Our objective was to understand better GEIs for temperate, temperate × highland, and highland tropical maize genotypes cultivated under temperate or highland tropical conditions. We related yield instabilit ...
DOI:
10.2135/cropsci2000.4041004x

12. Alteration of the genomic composition of Solanum nigrum (+) potato backcross derivatives by somatic hybridization: selection of fusion hybrids by DNA measurements and GISH

Author:
Horsman, K.; Gavrilenko, T.; Bergervoet, M.; Huigen, D.J.; Joe, A.T.W.; Jacobsen, E.
Source:
Plant breeding 2001 v.120 no.3 pp. 201-207
ISSN:
0179-9541
Subject:
Solanum nigrum; Solanum tuberosum; interspecific hybridization; backcrossing; somatic hybridization; protoplast fusion; hybrids; flow cytometry; chromosome number; fruit set; flowering; diploidy; tetraploidy; nucleic acid hybridization; genotype
Abstract:
... Fusion experiments were performed with a first (BC1-6738) and a second (BC2-9017) generation backcross hybrid of 6x Solanum nigrum (+) 2x potato somatic hybrids with potato cultivars. Because no progeny was obtained from the BC2 genotypes, alternative approaches were sought to overcome the sexual crossing barrier. Five potato genotypes, one of which contains the hygromycin resistance gene, were us ...
DOI:
10.1046/j.1439-0523.2001.00591.x

13. Fitness of backcross six of hybrids between transgenic oilseed rape (Brassica napus) and wild radish (Raphanus raphanistrum)

Author:
Gueritaine, G.; Sester, M.; Eber, F.; Chevre, A.M.; Darmency, H.
Source:
Molecular ecology 2002 v.11 no.8 pp. 1419-1426
ISSN:
0962-1083
Subject:
height; plant characteristics; Brassica napus; transgenic plants; Raphanus raphanistrum; wild relatives; weeds; interspecific hybridization; backcrossing; hybrids; herbicide resistance; glufosinate; genes; seedling emergence; seedling growth; mortality; flowering; chromosome number; fields; interspecific competition; male fertility; pollen; gene flow; edge effects
DOI:
10.1046/j.1365-294X.2002.01540.x
PubMed:
12144662

14. Registration of 16 day length-neutral flowering primitive cotton germplasm lines

Author:
McCarty, J.C. Jr.; Jenkins, J.N.
Source:
Crop science 2002 v.42 no.5 pp. 1755-1756
ISSN:
0011-183X
Subject:
Gossypium hirsutum; photoperiod; flowering; backcrossing; crop quality; plant genetic resources; germplasm; agronomic traits; crop yield; Mississippi

15. Brassica napus lines with rearranged Arabidopsis mitochondria display CMS and a range of developmental aberrations

Author:
M. Leino; R. Teixeira; M. Landgren; K. Glimelius
Source:
Theoretical and applied genetics 2003 v.106 no.7 pp. 1156-1163
ISSN:
0040-5752
Subject:
Arabidopsis thaliana; Brassica napus; backcrossing; calyx; corolla; cytoplasmic male sterility; flowering; hybrids; mitochondria; mitochondrial DNA; mitochondrial genome; nuclear genome; nuclear-cytoplasmic interactions; phenotype; pistil; plastid genome; restriction fragment length polymorphism; somatic hybridization; stamens
Abstract:
... Numerous Brassica napus (+) Arabidopsis thaliana somatic hybrids were screened for male sterility and aberrant flower phenotypes. Nine hybrids were selected and backcrossed recurrently to B. napus. The resulting lines displayed stable maternal inheritance of flower phenotypes. Nuclear and organellar genomes were characterized molecularly using RFLP analysis. No DNA from A. thaliana was found in th ...
DOI:
10.1007/s00122-002-1167-y

16. Controlled and open pollination between Pinus brutia (Ten.) and Pinus halepensis (Mill.) in Israel and hybrid performance

Author:
ANAT MADMONY; GABRIEL SCHILLER; YOSSI MOSHE; GALIT TSABARY; ZVI MENDEL; JOSEPH RIOV
Source:
Israel journal of plant sciences 2003 v.51 no.3 pp. 213-222
ISSN:
0792-9978
Subject:
Matsucoccus josephi; Mediterranean climate; Pinus brutia; Pinus halepensis; backcrossing; clones; environmental factors; flowering; germination; hybrids; open pollination; parents; seedlings; seeds; Israel
Abstract:
... The present study examined the occurrence of open and controlled pollination between Pinus brutia (Ten.) and Pinus halepensis (Mill.) under the environmental conditions of the East Mediterranean climate. Controlled interspecific pollination succeeded only with P. brutia as the maternal parent and P. halepensis as the paternal parent. Open interspecific pollination also occurred under Israeli condi ...
DOI:
10.1560/FNFR-JCUH-3EEA-0UGJ

17. Flowering response of rice to photoperiod and temperature: a QTL analysis using a phenological model

Author:
H. Nakagawa; J. Yamagishi; N. Miyamoto; M. Motoyama; M. Yano; K. Nemoto
Source:
Theoretical and applied genetics 2005 v.110 no.4 pp. 778-786
ISSN:
0040-5752
Subject:
Oryza sativa; backcrossing; early development; field experimentation; flowering; inbred lines; loci; models; photoperiod; quantitative trait loci; rice; temperature
Abstract:
... In this study we have attempted to quantify the thermal and photoperiodical responses of rice (Oryza sativa L.) flowering time QTLs jointly by a ‘date-of-planting’ field experiment of a mapping population, and a ‘phenological model’ analysis that separately parameterizes the two responses, based on daily temperature, daily photoperiod and flowering date. For this purpose, the ‘three-stage Beta mod ...
DOI:
10.1007/s00122-004-1905-4

18. Reproductive fitness of hybrids between Senecio jacobaea and S. aquaticus (Asteraceae)

Author:
Kirk, Heather; Vrieling, Klaas; Klinkhamer, Peter G. L.
Source:
American journal of botany 2005 v.92 no.9 pp. 1467-1473
ISSN:
0002-9122
Subject:
backcrossing; inflorescences; hybrids; flowering; pollen flow; plant fertility; gene flow; Jacobaea vulgaris; interspecific hybridization; seed productivity; Senecio
Abstract:
... Natural hybridization is increasingly recognized as an important process for the ecology and evolution of natural plant populations and species. There is a great need to initiate more studies based on natural populations in order to elucidate the possible role of hybrids in nature. The reproductive success of early generation hybrids can make or break hybrid lineages and may determine the genetic ...
DOI:
10.3732/ajb.92.9.1467
PubMed:
21646164

19. Cultivated Helianthus annuus (Asteraceae) volunteers as a genetic "bridge" to weedy sunflower populations in North America

Author:
Reagon, Michael; Snow, Allison A.
Source:
American journal of botany 2006 v.93 no.1 pp. 127-133
ISSN:
0002-9122
Subject:
Helianthus annuus; sunflower seed; field crops; weeds; gene flow; pollen; seed dispersal; phenotype; flowering; phenology; genetic markers; seedlings; backcrossing; hybridization; Ohio
Abstract:
... In many crops, unharvested seeds can create populations of volunteer plants that increase opportunities for crop-to-wild gene flow. Pollen-mediated gene flow between cultivated and wild sunflower (both Helianthus annuus, Asteraceae) is well documented, but the role of seed dispersal and volunteers has not been investigated. We compared flowering times and other phenotypic traits of volunteers from ...
DOI:
10.3732/ajb.93.1.127

20. Genetic interactions in the control of flowering time and reproductive structure development in tomato (Solanum lycopersicum)

Author:
Muriel Quinet; Vincent Dielen; Henri Batoko; Marc Boutry; Andrée Havelange; Jean‐Marie Kinet
Source:
new phytologist 2006 v.170 no.4 pp. 701-710
ISSN:
0028-646X
Subject:
Solanum lycopersicum var. lycopersicum; tomatoes; mutants; genetic variation; phenotypic variation; inflorescences; flowering; plant reproduction; leaf development; backcrossing; sequence analysis; plant genetics
Abstract:
... • Different tomato (Solanum lycopersicum) mutants, affected in flowering time, reproductive structure or plant architecture, were crossed to produce double mutants in order to investigate gene interactions in flowering regulation in this autonomous species with a sympodial growth habit. • The compound inflorescence: uniflora, uniflora: self pruning, uniflora: blind, and jointless: uniflora double ...
DOI:
10.1111/j.1469-8137.2006.01717.x
PubMed:
16684232

21. Population development by phenotypic selection with subsequent marker-assisted selection for line extraction in cucumber (Cucumis sativus L.)

Author:
Zhicheng Fan; Matthew D. Robbins; Jack E. Staub
Source:
Theoretical and applied genetics 2006 v.112 no.5 pp. 843-855
ISSN:
0040-5752
Subject:
backcrossing; plant breeding; marker-assisted selection; phenotype; flowering; Cucumis sativus; diameter; plant architecture; genetic improvement; cucumbers; female flowers; branching; length; artificial selection
Abstract:
... Cucumber (Cucumis sativus L.; 2n=2x=14) has a narrow genetic base, and commercial yield of US processing cucumber has plateaued in the last 15 years. Yield may be increased by altering plant architecture to produce unique early flowering (days to flower, DTF), female (gynoecious, GYN), highly branched (multiple lateral branching, MLB), long-fruited (length:diameter ratio, L:D) cultivars with diver ...
DOI:
10.1007/s00122-005-0186-x
PubMed:
16397790

22. Somatic hybridization between Solanum tuberosum and S. cardiophyllum

Author:
Shi, Y.Z.; Chen, Q.; Li, H.Y.; Beasley, D.; Lynch, D.R.
Source:
Canadian journal of plant science 2006 v.86 no.2 pp. 539-545
ISSN:
0008-4220
Subject:
flowering; Solanum tuberosum; Solanum cardiophyllum; potatoes; genetic markers; backcrossing; somatic hybridization; stems; fruit set; petioles; interspecific hybridization; wild relatives; random amplified polymorphic DNA technique; protoplast fusion; wide hybridization; chromosome number; plant genetic resources; endosperm; color; plant morphology
DOI:
10.4141/P05-076

23. Effects of Hordeum chilense cytoplasm on agronomic traits in common wheat

Author:
Atienza, S.G.; Martín, A.C.; Ramírez, M.C.; Martín, A.; Ballesteros, J.
Source:
Plant breeding 2007 v.126 no.1 pp. 5-8
ISSN:
0179-9541
Subject:
Aegilops; Hordeum chilense; Triticum aestivum; agronomic traits; backcrossing; chloroplasts; field experimentation; flowering; genetic markers; genome; microsatellite repeats; wheat
Abstract:
... The genome of bread wheat, AABBDD, was substituted into the cytoplasm of Hordeum chilense by repeated backcrossing to produce alloplasmic lines. The aim of this work was to investigate the effect of H. chilense cytoplasm on agronomic traits in common wheat. Three cytolines were developed. The alloplasmic nature of these lines was confirmed using chloroplast simple-sequence repeat markers. Each cyt ...
DOI:
10.1111/j.1439-0523.2007.01319.x

24. Epistatic interactions of three loci regulate flowering time under short and long daylengths in a backcross population of rice

Author:
Gu, Xing-You; Foley, Michael E.
Source:
Theoretical and applied genetics 2007 v.114 no.4 pp. 745-754
ISSN:
0040-5752
Subject:
alleles; backcrossing; flowering; loci; photoperiod; quantitative trait loci; rice; selenium
Abstract:
... The short-day plant rice varies greatly in photoperiod sensitivity (PS) for flowering. The hybrid F₁ from a cross between the day-neutral pure line EM93-1 and the weedy rice accession SS18-2 had stronger PS than SS18-2. Some BC₁ (EM93-1/F₁) segregates were even more sensitive to photoperiod than the F₁, as indicated by later flowering or no flowering after 250 days under a 14-h long daylength. A g ...
DOI:
10.1007/s00122-006-0475-z
PubMed:
17171390

25. Production and characterization of arboreous and fertile Solanum melongena + Solanum marginatum somatic hybrid plants

Author:
Borgato, Lorena; Conicella, Clara; Pisani, Federica; Furini, Antonella
Source:
Planta 2007 v.226 no.4 pp. 961-969
ISSN:
0032-0935
Subject:
Solanum marginatum; Solanum melongena; annuals; backcrossing; chromosome number; chromosome pairing; crops; eggplants; energy; flowering; fruits; greenhouses; heterokaryon; hybrids; leaves; microsatellite repeats; microsporogenesis; perennials; pollen; polymerase chain reaction; protoplasts; seeds; somatic hybridization
Abstract:
... In crop plants the shift from being annuals to perennials may allow future agricultural systems requiring less energy inputs. The practicability of this was tested for Solanum melongena. Leaf protoplasts of S. melongena (2n = 2x = 24) and one of the related arborescent species Solanum marginatum (2n = 2x = 24) were electrofused and fertile somatic hybrids with arborescent habit regenerated. The ma ...
DOI:
10.1007/s00425-007-0542-y
PubMed:
17520277

26. QTL mapping with near-isogenic lines in maize

Author:
S. J. Szalma; B. M. Hostert; J. R. LeDeaux; C. W. Stuber; J. B. Holland
Source:
Theoretical and applied genetics 2007 v.114 no.7 pp. 1211-1228
ISSN:
0040-5752
Subject:
backcrossing; chromosome mapping; corn; flowering; genetic background; geneticists; genome; hybrids; introgression; loci; marker-assisted selection; quantitative trait loci; restriction fragment length polymorphism; testcrosses; water stress
Abstract:
... A set of 89 near-isogenic lines (NILs) of maize was created using marker-assisted selection. Nineteen genomic regions, identified by restriction fragment length polymorphism loci and chosen to represent portions of all ten maize chromosomes, were introgressed by backcrossing three generations from donor line Tx303 into the B73 genetic background. NILs were genotyped at an additional 128 simple seq ...
DOI:
10.1007/s00122-007-0512-6
PubMed:
17308934

27. The effect of the cytoplasms of Brassica napus and B. juncea on some characteristics of B. carinata, including flower morphology

Author:
Caitao T. Chang; Ryota Uesugi; Kana Hondo; Fumika Kakihara; Masahiro Kato
Source:
Euphytica 2007 v.158 no.1-2 pp. 261-270
ISSN:
0014-2336
Subject:
backcrossing; interspecific variation; flowering; androecium; gynoecium; corolla; plant taxonomy; phylogeny; phenology; Brassica juncea; plant morphology; cytoplasm; cell nucleus; Brassica napus; interspecific hybridization; Brassica carinata; rapeseed
Abstract:
... This study was conducted to assess the cytoplasm effects of Brassica napus and B. juncea on the some characteristics of B. carinata, as well as the phylogenetic distances separating the three species. Alloplasmic lines of B. carinata were developed from B. napus × B. carinata and B. juncea × B. carinata hybrids by recurrent backcrossing to the BC₇ generation. Sixteen populations from three generat ...
DOI:
10.1007/s10681-007-9424-4

28. A hybrid zone dominated by fertile F₁s of two alpine shrub species, Phyllodoce caerulea and Phyllodoce aleutica, along a snowmelt gradient

Author:
KAMEYAMA, Y.; KASAGI, T.; KUDO, G.
Source:
Journal of evolutionary biology 2008 v.21 no.2 pp. 588-597
ISSN:
1010-061X
Subject:
Phyllodoce; alpine plants; backcrossing; chloroplast DNA; ecosystems; flowering; gene flow; haplotypes; hybrids; phenology; pollen flow; seed germination; shrubs; snowmelt; Japan
Abstract:
... In alpine ecosystems, the steep environmental gradients produced by the difference in snowmelt timing create a dynamic selective regime for alpine plants. As these gradients directly alter flowering phenology, they can affect pollen-mediated gene flow among populations of single and related species. In northern Japan, we found a hybrid zone dominated by fertile F₁s of two alpine shrub species, Phy ...
DOI:
10.1111/j.1420-9101.2007.01476.x

29. Airborne-pollen pool and mating pattern in a hybrid zone between Pinus pumila and P. parviflora var. pentaphylla

Author:
ITO, MEGUMI; SUYAMA, YOSHIHISA; OHSAWA, TAKESHI A.; WATANO, YASUYUKI
Source:
Molecular ecology 2008 v.17 no.23 pp. 5092-5103
ISSN:
0962-1083
Subject:
Pinus pumila; adults; assortative mating; backcrossing; chloroplast DNA; flowering; grains; hybrids; introgression; parents; phenology; pollen; polymerase chain reaction; reproductive isolation; seed trees; seeds; Japan
Abstract:
... The reproductive isolation barriers and the mating patterns among Pinus pumila, P. parviflora var. pentaphylla and their hybrids were examined by flowering phenology and genetic assays of three life stages: airborne-pollen grains, adults and seeds, in a hybrid zone on Mount Apoi, Hokkaido, Japan. Chloroplast DNA composition of the airborne-pollen was determined by single-pollen polymerase chain re ...
DOI:
10.1111/j.1365-294X.2008.03966.x
PubMed:
19120991

30. Characterization of inter-varietal chromosome substitution lines of wheat using molecular markers

Author:
K. Pánková; Z. Milec; M. Leverington-Waite; S. Chebotar; J.W. Snape
Source:
Czech journal of genetics and plant breeding v.44 no.1 pp. 22-29
ISSN:
1212-1975
Subject:
aneuploidy; backcrossing; chromosomes; flowering; genes; genetic markers; growth habit; substitution lines; vernalization; wheat
Abstract:
... Several sets of wheat inter-varietal chromosome substitution lines (SLs) have been produced over the last fifty years at the CRI (formerly RICP) in Prague-Ruzyně, based on cytogenetic manipulations using aneuploids. Lines with defined genes have been obtained which significantly influence growth habit and flowering time and these have been used particularly in the study of the genetics and physiol ...
DOI:
10.17221/1329-cjgpb

31. Does sequence polymorphism of FLC paralogues underlie flowering time QTL in Brassica oleracea

Author:
Razi, H.; Howell, E. C.; Newbury, H. J.; Kearsey, M. J.
Source:
Theoretical and applied genetics 2008 v.116 no.2 pp. 179-192
ISSN:
0040-5752
Subject:
Arabidopsis; Brassica oleracea; alleles; backcrossing; confidence interval; flowering; haploidy; introns; linkage groups; parents; quantitative trait loci; stop codon; temporal variation
Abstract:
... Previous locations of flowering time (FT) QTL in several Brassica species, coupled with Arabidopsis synteny, suggest that orthologues of the genes FLC, FY or CONSTANS might be the candidates. We focused on FLC, and cloned paralogous copies in Brassica oleracea, obtained their genomic DNA sequences, and confirmed their locations relative to those of known FT-QTL by genetical mapping. They varied in ...
DOI:
10.1007/s00122-007-0657-3
PubMed:
17938878

32. Introgression of a quantitative trait locus for spikelets per panicle from Oryza minuta to the O. sativa cultivar Hwaseongbyeo

Author:
Linh, L.-H.; Hang, N.-T.; Jin, F.-X.; Kang, K.-H.; Lee, Y.-T.; Kwon, S.-J.; Ahn, S.-N.
Source:
Plant breeding 2008 v.127 no.3 pp. 262-267
ISSN:
0179-9541
Subject:
Oryza minuta; Oryza sativa; alleles; backcrossing; branches; cultivars; flowering; genetic lines; inflorescences; introgression; loci; marker-assisted selection; microsatellite repeats; molecular cloning; quantitative trait loci
Abstract:
... A new QTL for spikelets per panicle (SPP) was detected on the long arm of chromosome 7 in an F₂ population derived from a cross between the japonica cultivar Hwaseongbyeo and WH29001. WH29001, an advanced backcross line was developed by introgressing chromosomal segments from an accession of O. minuta (2n = 48, BBCC, Acc. no. 101141) into the O. sativa subsp. japonica cv. Hwaseongbyeo. The O. minu ...
DOI:
10.1111/j.1439-0523.2007.01462.x

33. Introgression of reproductive traits from Trifolium nigrescens increases the seed yield of white clover (T. repens)

Author:
Marshall, A.H.; Michaelson-Yeates, T.P.T.; Abberton, M.T.
Source:
Plant breeding 2008 v.127 no.6 pp. 597-601
ISSN:
0179-9541
Subject:
Trifolium nigrescens; Trifolium repens; backcrossing; field experimentation; florets; flowering; hybrids; interspecific hybridization; introgression; leaves; reproductive traits; seed yield; seeds; yield components
Abstract:
... Interspecific hybrids between white clover and the annual, profuse flowering ball clover have been developed as a strategy to improve the potential seed yield of white clover. The seed yield and seed yield components of advanced white clover x ball clover hybrids were compared with white clover in replicated field experiments over two harvest years. The backcross 3 hybrid had more reproductive nod ...
DOI:
10.1111/j.1439-0523.2008.01534.x

34. Quantitative trait loci controlling flowering time and related traits in a Solanum lycopersicum x S. pimpinellifolium cross

Author:
Cagas, Cyd Celeste; Lee, O New; Nemoto, Keisuke; Sugiyama, Nobuo
Source:
Scientia horticulturae 2008 v.116 no.2 pp. 144-151
ISSN:
0304-4238
Subject:
Solanum lycopersicum var. lycopersicum; tomatoes; vegetable crops; Solanum pimpinellifolium; wild relatives; plant genetic resources; interspecific hybridization; hybrids; flowering; phenology; crop yield; quantitative trait loci; agronomic traits; chromosome mapping; leaves; leaf area; shoots; dry matter accumulation; height; backcrossing; phenotype; pleiotropy; genetic correlation
Abstract:
... Flowering time is an important factor determining early yield in tomato. However, the quantitative trait loci (QTLs) controlling flowering time and their relation to other QTLs for morphological and physiological traits have not been well studied. The aim of this study was to map the chromosomal regions controlling days to flowering (DTF) concurrently with other traits, such as the number of leave ...
DOI:
10.1016/j.scienta.2007.12.003

35. A method for accelerated trait conversion in plant breeding

Author:
Lewis, Ramsey S.; Kernodle, S. P.
Source:
Theoretical and applied genetics 2009 v.118 no.8 pp. 1499-1508
ISSN:
0040-5752
Subject:
Arabidopsis thaliana; Nicotiana tabacum; backcrossing; crops; cultivars; disease resistance; epigenetics; flowering; gene overexpression; gene transfer; genetic background; loci; photoperiod; plant breeding; tobacco; tobacco use; transgenes
Abstract:
... Backcrossing is often used in cultivar development to transfer one or a few genes to desired genetic backgrounds. The duration necessary to complete such 'trait conversions' is largely dependent upon generation times. Constitutive overexpression of the Arabidopsis thaliana gene FT (FLOWERING LOCUS T) induces early-flowering in many plants. Here, we used tobacco (Nicotiana tabacum L.) as a model sy ...
DOI:
10.1007/s00122-009-0998-1
PubMed:
19266176

36. A review on transgenic approaches to accelerate breeding of woody plants

Author:
Flachowsky, H.; Hanke, M.-V.; Peil, A.; Strauss, S.H.; Fladung, M.
Source:
Plant breeding 2009 v.128 no.3 pp. 217-226
ISSN:
0179-9541
Subject:
Arabidopsis thaliana; backcrossing; biotechnology; cultivars; environmental factors; flowering; forest trees; gene overexpression; genetically modified organisms; germ cells; juveniles; new variety; progeny; regulator genes; woody plants
Abstract:
... The long juvenile period of trees delays the breeding of new varieties. Flowering begins within 5-10 years in most cultivated forest trees under intensive management, but can take up to 40 years in some species and environmental conditions. To accelerate the breeding process several agrotechnical and biotechnical methods have been developed. Knowledge about genes controlling flower initiation in m ...
DOI:
10.1111/j.1439-0523.2008.01591.x

37. Genetic location and evaluation of chromosomal segments for drought tolerance at flowering stage in maize using selected backcross populations

Author:
Li, Y.; Liu, C.; Shi, Y.; Song, Y.; Wang, T.
Source:
Plant breeding 2009 v.128 no.4 pp. 342-347
ISSN:
0179-9541
Subject:
alleles; backcrossing; chromosomes; corn; crops; drought tolerance; flowering; genetic markers; introgression; water stress
Abstract:
... Development and evaluation of introgression lines have become one of the promising approaches to understanding genetic mechanisms of important traits in crops. In this study, three sets of drought tolerance (DT) selected backcross populations in maize, including two BC₂S₁ populations and one BC₃S₁ population, from a cross of Qi319 and Huangzaosi (recurrent parent) were developed by selecting for s ...
DOI:
10.1111/j.1439-0523.2009.01666.x

38. Mining cotton fiber strength candidate genes based on transcriptome mapping

Author:
HengWei Liu; XingFen Wang; YuXin Pan; RuiFeng Shi; GuiYin Zhang; ZhiYing Ma
Source:
Chinese science bulletin 2009 v.54 no.24 pp. 4651-4657
ISSN:
1001-6538
Subject:
1-phosphatidylinositol 4-kinase; Gossypium hirsutum; alpha,alpha-trehalose-phosphate synthase (UDP-forming); amplified fragment length polymorphism; backcrossing; cell walls; cellulose; chromosome mapping; flowering; genes; lint cotton; metabolism; morphogenesis; phenylalanine ammonia-lyase; quantitative trait loci; transcription factors; transcriptome; variance
Abstract:
... Cotton fiber strength is mainly determined during the secondary cell wall (SCW) thickening stage. In 24–25 days post anthesis (DPA) of SCW thickening stage, cDNA-amplified fragment length polymorphism (AFLP) was carried out to construct fiber transcriptome groups. Based on these groups, cotton fiber strength candidate genes were detected by composite interval mapping (CIM) through quantitative tra ...
DOI:
10.1007/s11434-009-0708-z

39. Selection before backcross during exotic germplasm introgression

Author:
Ochanda, N.; Yu, J.; Bramel, P.J.; Menkir, A.; Tuinstra, M.R.; Witt, M.D.
Source:
Field crops research 2009 v.112 no.1 pp. 37-42
ISSN:
0378-4290
Subject:
germplasm; backcrossing; prediction; flowering; phenotype; grain sorghum; models; height; agronomic traits; plant adaptation; plant genetic resources; grain yield; inbred lines; Sorghum bicolor; genetic variation; artificial selection; introgression; Kansas
Abstract:
... Introgression of genes from exotic germplasm into breeding populations can broaden the genetic base of crop improvement. Only a very small percentage of genetic variability has been used in crop breeding programs. Traditionally, F₁ plants are used to backcross to the adapted lines or populations. An alternative approach is to backcross the F₂ individuals selected for agronomic acceptability. Our o ...
DOI:
10.1016/j.fcr.2009.01.012

40. Characterization of Apomictic BC7 and BC8 Pearl Millet: Meiotic Chromosome Behavior and Construction of an ASGR-carrier Chromosome-specific Library

Author:
M. Singh; J.A. Conner; Y.-J. Zeng; W. W. Hanna; V. E. Johnson; P. Ozias-Akins
Source:
Crop science 2010 v.50 no.3 pp. 892-902
ISSN:
0011-183X
Subject:
flowering; millets; pollen; nucleic acid hybridization; backcrossing; phenology; apomixis; genotype; wild relatives; Pennisetum squamulatum; seed set; embryo sac; Pennisetum glaucum; dominance (genetics); plant genetic resources; meiosis; viability; loci; nucleotide sequences; crossbreds; plant morphology
Abstract:
... Apospory in Pennisetum squamulatum Fresen is inherited as a single-locus dominant trait. Molecular analysis has identified the apospory-specific genomic region (ASGR), a large segment of one chromosome that is necessary and sufficient to confer apomixis. To transfer apospory from P. squamulatum to pearl millet [P. glaucum (L.) R. Br.], advanced backcrosses were generated. Here we report the charac ...
DOI:
10.2135/cropsci2009.05.0263

41. Testing hybridization hypotheses and evaluating the evolutionary potential of hybrids in mangrove plant species

Author:
LO, E.Y.Y.
Source:
Journal of evolutionary biology 2010 v.23 no.10 pp. 2249-2261
ISSN:
1010-061X
Subject:
Rhizophora; backcrossing; biodiversity; chloroplasts; flowering; hybridization; hybrids; microsatellite repeats; parents; phylogeny
Abstract:
... Natural hybridization is of marked importance from global to local biological diversity. In mangroves, species ranges overlap extensively with one another and species share a long overlap of flowering time. Although hybridization has been suggested, patterns of hybridization and the evolutionary potential of hybrids are not yet fully understood. This study provides molecular evidence for the paren ...
DOI:
10.1111/j.1420-9101.2010.02087.x
PubMed:
20796134

42. Transfer of the Kosena Rfk1 gene, required in hybrid seed production, from oilseed rape to turnip rape

Author:
Niemelä, Tarja; Seppänen, Mervi; Jauhiainen, Lauri; Tulisalo, Unto
Source:
Euphytica 2010 v.175 no.1 pp. 1-12
ISSN:
0014-2336
Subject:
cytoplasmic male sterility; backcrossing; ovules; plant breeding; flowering; polymerase chain reaction; plant fertility; heterozygosity; quantitative genetics; inbreeding; genes; Brassica napus; Brassica rapa; interspecific hybridization; homozygosity; restorer lines; pollen; cross pollination
Abstract:
... The Ogura cytoplasmic male sterility and fertility restoring (cms/Rf) system is one of the most promising hybrid systems in Brassica species. The Ogura cms has been introduced earlier into spring turnip rape (Brassica rapa L.) and the sterility has been stable. To enable the production of F1 hybrids in turnip rape, the Kosena fertility restoring gene (Rfk1), a homologue of the Ogura fertility rest ...
DOI:
10.1007/s10681-010-0171-6

43. Use of molecular markers aids in the development of diverse inbred backcross lines in Beit Alpha cucumber (Cucumis sativus L.)

Author:
Delannay, Isabelle Y.; Staub, Jack E.
Source:
Euphytica 2010 v.175 no.1 pp. 65-78
ISSN:
0014-2336
Subject:
backcrossing; weight; plant breeding; flowering; marker-assisted selection; gynoecium; Cucumis sativus; geographical variation; cucumbers; flowers; genotype; inbred lines; length; genetic variation; genetic markers; United States; Israel; Netherlands; Turkey (country)
Abstract:
... Beit Alpha cucumber (Cucumis sativus L.) is a Mediterranean fresh-market type with a relatively narrow genetic base. To broaden its base for plant improvement, 42 diverse accessions were compared employing a previously defined standard marker array to choose wide-based parental lines for use in backcross introgression. Inbred backcross lines (IBL) were developed by crossing Beit Alpha line ‘04HD5' ...
DOI:
10.1007/s10681-010-0183-2

44. Dynamic expression of green fluorescent protein and Bacillus thuringiensis Cry1Ac endotaxin in interspecific hybrids and successive backcross generations (BC1 and BC2) between transgenic Brassica napus crop and wild Brassica juncea

Author:
L. Lei; C.N. Stewart Jr; Z.‐X. Tang; W. Wei
Source:
Annals of applied biology 2011 v.159 no.2 pp. 212-219
ISSN:
0003-4746
Subject:
Bacillus thuringiensis; Brassica juncea; Brassica napus var. napus; backcrossing; biosafety; cole crops; flowering; fluorescence; gene expression; gene flow; genetic markers; genotype; green fluorescent protein; greenhouses; hybrids; transgenes
Abstract:
... The persistence and stability of a transgene encoding a Bacillus thuringiensis (Bt) Cry1Ac insecticidal protein was investigated in hybrids between crop Brassica napus and a recurrent wild Brassica juncea population. Interspecific hybrids (F1) and backcross progenies (BC1, BC2) containing green fluorescent protein (GFP) and Bt genes were successfully produced in the greenhouse. Stable Bt toxin lev ...
DOI:
10.1111/j.1744-7348.2011.00486.x

45. Long Juvenile Soybean Flowering Responses under Very Short Photoperiods

Author:
Elroy R. Cober
Source:
Crop science 2011 v.51 no.1 pp. 140-145
ISSN:
0011-183X
Subject:
maturity groups; juvenility; backcrossing; Glycine max; flowering; loci; gene segregation; phenology; soybeans; genotype; photoperiod; genetic variation; introgression
Abstract:
... Long juvenile (LJ) soybean [Glycine max (L.) Merr.] lines exhibit delayed flowering under short photoperiods. Two loci, J and E6, have been reported to control this response. The objectives of this work were to compare phenology of E6E6 and e6e6 isolines across a range of photoperiods, to determine the genetic control of the LJ trait during the introgression of e6 into an early maturity background ...
DOI:
10.2135/cropsci2010.05.0262

46. Marker-assisted backcross selection in an interspecific Cucumis population broadens the genetic base of cucumber (Cucumis sativus L.)

Author:
Behera, Tusar K.; Staub, Jack E.; Behera, Snigdha; Delannay, Isabelle Y.; Chen, Jin Feng
Source:
Euphytica 2011 v.178 no.2 pp. 261-272
ISSN:
0014-2336
Subject:
Cucumis sativus; DNA; backcrossing; branches; cucumbers; domestication; flowering; fruit quality; fruits; genetic background; genetic variation; genome; interspecific hybridization; introgression; marker-assisted selection; parents; progeny; selection response; vegetative growth
Abstract:
... Cucumber (Cucumis sativus L.) is a major cucurbit vegetable species whose genetic base has been drastically reduced during its domestication. The crop's narrow genetic base (3-12% DNA polymorphism) has resulted from the use of limited genetic material and intense selection during plant improvement. Recently, however, interspecific hybridization has been successful in Cucumis via mating of C. hystr ...
DOI:
10.1007/s10681-010-0315-8

47. Molecular markers assist in the development of diverse inbred backcross lines in European Long cucumber (Cucumis sativus L.)

Author:
Delannay, Isabelle Y.; Staub, Jack E.
Source:
Euphytica 2011 v.178 no.2 pp. 229-245
ISSN:
0014-2336
Subject:
Cucumis sativus; backcrossing; bacterial artificial chromosomes; branches; cucumbers; expressed sequence tags; flowering; fresh market; fruit quality; genetic background; genetic distance; genetic markers; genetic variation; greenhouses; hydroponics; inbred lines; loci; markets; microsatellite repeats; multivariate analysis; parents; progeny; seeds; single nucleotide polymorphism; Netherlands; Wisconsin
Abstract:
... The popular fresh-market European Long cucumber (Cucumis sativus L.) is grown commercially worldwide under controlled, greenhouse environments. However, it has a narrow genetic base, where private and public improvement programs can trace their origins to comparatively few accessions. Therefore, a project was designed to identify diverse genotypes for use in the formation and analysis of inbred ba ...
DOI:
10.1007/s10681-010-0306-9

48. Identification of genes that were differentially expressed and associated with fiber yield and quality using cDNA-AFLP and a backcross inbred line population

Author:
M. X. Pang; R. G. Percy; S. E. Hughs; D. C. Jones; J. F. Zhang
Source:
Molecular breeding 2012 v.30 no.2 pp. 975-985
ISSN:
1380-3743
Subject:
cotton; backcrossing; quantitative trait loci; flowering; amplified fragment length polymorphism; loci; complementary DNA; Gossypium hirsutum; selfing; reverse transcriptase polymerase chain reaction; genes; inbred lines; plant ovary; gene expression regulation; sequence homology
Abstract:
... Numerous quantitative trait loci (QTLs) have been identified from segregating hybrid populations between Upland (Gossypium hirsutum) and Pima (G. barbadense) cotton. However, the genetic basis of these QTLs is currently unknown. In the present study, an interspecific backcross inbred line (BIL) population was tested at two locations in 2005 and 2006, and used to identify and isolate polymorphic tr ...
DOI:
10.1007/s11032-011-9682-7

49. Morphological and molecular analysis of natural hybrids between the diploid Centaurea aspera L. and the tetraploid C. seridis L. (Compositae)

Author:
M. Ferriol; A. Garmendia; J. J. Ruiz; H. Merle; H. Boira
Source:
Plant biosystems 2012 v.146 no.sup1 pp. 86-100
ISSN:
1724-5575
Subject:
Centaurea aspera; DNA; alleles; backcrossing; diploidy; evolution; flow cytometry; flowering; gene flow; genetic variation; hybridization; hybrids; parents; progeny; random amplified polymorphic DNA technique; tetraploidy; triploidy; Spain
Abstract:
... Polyploidy and hybridisation are the basis of the evolution of Centaurea (Compositae). At the El Saler dune field (eastern Spain), the diploid Centaurea aspera ssp. stenophylla and the tetraploid C. seridis ssp. maritima form a polyploid complex in which C. × subdecurrens individuals occur. This polyploid complex was analysed morphologically and genetically, using random amplified polymorphic DNA ...
DOI:
10.1080/11263504.2012.727878

50. Sensory changes related to breeding for plant architecture and resistance to viruses and anthracnose in bean market class Fabada (Phaseolus vulgaris L.)

Author:
J. J. Ferreira; Romero R. del Castillo; E. Perez-Vega; M. Plans; J. Simó; F. Casañas
Source:
Euphytica 2012 v.186 no.3 pp. 687-696
ISSN:
0014-2336
Subject:
determinate growth; beans; flowering; Phaseolus vulgaris; genes; cooking; backcrossing; sensory evaluation; landraces; viruses; phenotypic variation; case studies; anthracnose; plant breeding; testa; plant architecture; sensory properties; inbreeding; environmental factors; soil types; rain; pedigree
Abstract:
... Consumers hold landraces in high esteem and often consider that breeding programs lead to a loss of sensory quality, although consumers’ opinions have not been scientifically confirmed. As a model case of study we recorded seed sensory traits in six inbred common bean lines classified in the market class Fabada obtained by backcrossing and/or pedigree selection (to change the plant architecture an ...
DOI:
10.1007/s10681-011-0540-9