U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Subject bolls Remove constraint Subject: bolls Subject term cultivars Remove constraint Subject term: cultivars Subject term Gossypium hirsutum Remove constraint Subject term: Gossypium hirsutum Text availability Citation in PubAg Remove constraint Text availability: Citation in PubAg
Start Over

Search

82  Search Results

« Previous | 1 - 50 of 82 |
Number of results to display per page

Search Results

1. Nondestructive Method for the Determination of Boll Surface Area in Cotton

Author:
B. L. McMichael; C. D. Elmore; G. W. Cathey
Source:
Agronomy journal 1976 v.68 no.2 pp. 426-427
ISSN:
0002-1962
Subject:
Gossypium hirsutum; bolls; cotton; cultivars; equations; greenhouses; nondestructive methods; regression analysis; surface area; transpiration
Abstract:
... Fruit (boll) transpiration rates in cotton (Gossypium hirsutum L.) may be important in boll growth and movement of materials into developing bolls. Therefore to facilitate comparisons of transpiration rates of different age (and size) bolls, a nondestructive method for the estimation of cotton boll surface areas was evaluated using two commercial cultivars grown in the greenhouse. Boll length was ...
DOI:
10.2134/agronj1976.00021962006800020058x

2. Cotton Population Dynamics: Influence of the Within-the-Row Spacing and Emergence Time

Author:
D. F. Wanjura; J. D. Bilbro
Source:
Agronomy journal 1977 v.69 no.2 pp. 312-318
ISSN:
0002-1962
Subject:
Gossypium hirsutum; bolls; cotton; cultivars; developmental stages; plant height; population dynamics; sample size; stem nodes
Abstract:
... Dynamic and stochastic properties of cotton (Gossypium hirsutum L.) plant populations increase the difficulty of production management. The influence of four within-the-row plant spacings on beds spaced at 102 an (5, 20, and 40 cm, and random 7.5 to 10 cm) and three times of emergence (5, 7, and 9 days in 1973; 6, 8, and 10 days in 1974) on means and coefficient(s) of variability (CV) of plant hei ...
DOI:
10.2134/agronj1977.00021962006900020027x

3. Seed Setting Efficiency in Eight Cultivars of Upland Cotton

Author:
John H. Turner; J. McD. Stewart; P. E. Hoskinson; H. H. Ramey
Source:
Crop science 1977 v.17 no.5 pp. 769-772
ISSN:
0011-183X
Subject:
Gossypium hirsutum; bolls; cultivars; ovules; seed set; seeds; Tennessee
Abstract:
... Seed setting efficiency was determined for six cultivars of Upland cotton (Gossypium hirsutum L.) in 1974 and eight cultivars in 1975 at Jackson, Tenn. The number of ovules per ovary was determined by examining blooms at weekly periods. Simultaneously tagged blooms provided identifiable bolls from each bloom period to determine the number of seeds per boll. Seed setting efficiency (S.S.E.) was cal ...
DOI:
10.2135/cropsci1977.0011183X001700050023x

4. Breeding Potentials of Noncultivated Cottons. IV. Location and Parental Effects on Agronomic Characters and Fiber Properties in Hybrids

Author:
F. D. Wilson; R. L. Wilson
Source:
Crop science 1978 v.18 no.3 pp. 467-471
ISSN:
0011-183X
Subject:
Gossypium hirsutum; Pectinophora gossypiella; agronomic traits; bolls; cotton; cultivars; fiber quality; genetic variation; heterosis; hybrids; inheritance (genetics); insecticides; Arizona
Abstract:
... We studied the inheritance of six agronomic characters and five fiber properties in Ft hybrids between two cultivars and eight primitive race stocks of cotton, Gossypium hirsutum L., in 1975 and between the same two cultivars and four other race stocks in 1976. Plants were grown at Phoenix, Ariz., where insecticides were applied as needed for control of pink bollworm, Pectinophora gossypiella (Sau ...
DOI:
10.2135/cropsci1978.0011183X001800030028x

5. Predicting Cotton Crop Boll Development

Author:
D. F. Wanjura; O. H. Newton
Source:
Agronomy journal 1981 v.73 no.3 pp. 476-481
ISSN:
0002-1962
Subject:
Gossypium hirsutum; air temperature; bolls; cultivars; lint cotton; prediction; High Plains (United States); Texas
Abstract:
... Cotton (Gossypium hirsutum L.) lint development on the Texas High Plains frequently spans periods of low temperature that reduce yield and quality. We conducted a study in 1977 to 1979 at Lubbock, Texas, to develop a procedure for estimating the level of crop lint maturity at any time after boll setting begins. The procedure includes a model that uses the initiation date for each 1/10 increment of ...
DOI:
10.2134/agronj1981.00021962007300030020x

6. Cotton Cultivar Response to Plant Populations in a Short-Season, Narrow-Row Cultural System

Author:
Khalid Bin Mohamad; W. P. Sappenfield; J. M. Poehlman
Source:
Agronomy journal 1982 v.74 no.4 pp. 619-625
ISSN:
0002-1962
Subject:
Argiudolls; Gossypium hirsutum; agronomic traits; bolls; cultivars; fiber quality; fruiting; genotype; harvesting; lint cotton; lint yield; pests; plant density; planting date; river deltas; seed size; silt loam soils
Abstract:
... The need for reducing time of crop exposure to pests has given emphasis to cultural changes in row widths and plant densities for upland cotton, Gossypium hirsutum L., and this has challenged available cultivars to avoid losses in yield and fiber quality. Four genotypes, HYC72-234/320 (very early), ‘Auburn M’ (early), MO63-277 BR (medium early), and ‘Stoneville 213’ (medium early to full-season) w ...
DOI:
10.2134/agronj1982.00021962007400040008x

7. Cotton Cultivar Response to Mepiquat Chloride

Author:
A. C. York
Source:
Agronomy journal 1983 v.75 no.4 pp. 663-667
ISSN:
0002-1962
Subject:
Gossypium hirsutum; bolls; chlorides; cultivars; lint cotton; lint yield; mepiquat; micronaire; pesticides; plant height; seed weight
Abstract:
... The effects of mepiquat chloride (1,1-dimethylpiperidinium chloride) on cotton (Gossypium hirsutum L.) growth and yield have been widely studied but few studies have investigated cultivar response to this plant growth regulator. Since the response to a pesticide or a plant growth regulator may vary among cultivars, a knowledge of cultivar response to that chemical is an important consideration whe ...
DOI:
10.2134/agronj1983.00021962007500040020x

8. Cotton Response to Planting Date and Mepiquat Chloride

Author:
George W. Cathey; William R. Meredith
Source:
Agronomy journal 1988 v.80 no.3 pp. 463-466
ISSN:
0002-1962
Subject:
Gossypium hirsutum; planting date; crop yield; bolls; fiber quality; fruiting; cultivars; mepiquat
Abstract:
... Few studies have documented the effect of planting date on cotton (Gossypium hirsutum L.) response to mepiquat chloride (MC) (N,N-dimethylpiperidinum chloride). Planting dates were mid-April, early May, and mid-May during 1982, 1983, and 1984, and consisted of five cultivars representing three general maturity types: early—‘DES 422’; intermediate—‘Coker 3131’, ‘Stoneville 825’, and ‘McNair 235’ an ...
DOI:
10.2134/agronj1988.00021962008000030014x

9. Effects of cultivar and boll age on aflatoxin in cottonseed after inoculation with Aspergillus flavus at simulated exit holes of the pink bollworm

Author:
Cotty, P.J.
Source:
Plant Disease 1989 v.73 no.6 pp. 489-492
ISSN:
0191-2917
Subject:
Gossypium hirsutum; Gossypium barbadense; Aspergillus flavus; bolls; age; mechanical damage; aflatoxins; seeds; cultivars
DOI:
10.1094/PD-73-0489

10. Potential for Increasing Cotton Yields Through Enhanced Partitioning to Reproductive Structures

Author:
William R. Meredith; Randy Wells
Source:
Crop science 1989 v.29 no.3 pp. 636-639
ISSN:
0011-183X
Subject:
cultivars; stems; Gossypium hirsutum; dry matter accumulation; agronomic traits; crop yield; genotype-environment interaction; genotype; genetic variance; bolls; vegetative growth; Mississippi
Abstract:
... Yield increases in cotton (Gossypium hirsutum L.) have been primarily through changes in partitioning dry matter from vegetative to reproductive structures. The objective of this study was to determine if yield increases would likely continue through continued changes in dry matter partitioning. Five obsolete cultivars, five popular and high yielding cultivars from five cotton breeding organizatio ...
DOI:
10.2135/cropsci1989.0011183X002900030017x

11. Effectiveness of Fruiting Sites in Cotton: Yield

Author:
Johnie N. Jenkins; J. C. McCarty; W. L. Parrott
Source:
Crop science 1990 v.30 no.2 pp. 365-369
ISSN:
0011-183X
Subject:
Gossypium hirsutum; cultivars; fruiting; bolls; branches; crop yield; lint cotton; pest resistance; Mississippi
Abstract:
... The fruiting sites at which cotton, Gossypium hirsutum L., plants set bolls that are harvested influence how well the plants tolerate insects. The objective of this research was to determine the fruiting patterns of eight cultivars of cotton in terms of fruiting sites of harvestable bolls when planted in a conventional pattern of rows spaced 1-m apart with a plant population of approximately 95 00 ...
DOI:
10.2135/cropsci1990.0011183X003000020024x

12. Fruiting Efficiency in Cotton: Boll Size and Boll Set Percentage

Author:
Johnie N. Jenkins; J. C. McCarty; W. L. Parrott
Source:
Crop science 1990 v.30 no.4 pp. 857-860
ISSN:
0011-183X
Subject:
Gossypium hirsutum; bolls; fruit set; cultivars; crop yield; Mississippi
Abstract:
... Cotton plants, Gossypium hirsutum L., initiate more fruiting buds than are matured. This research quantified the boll set percentage and boll size by fruiting site in a population of cotton plants. The fruiting sites of harvestable bolls were recorded for 2 yr in eight cultivars: Stoneville 213 (ST 213), Stoneville 506 (ST 506), Stoneville 825 (ST 825), Tamcot CAMD-E (CAMD-E), Deltapine 50 (DPL 50 ...
DOI:
10.2135/cropsci1990.0011183X003000040018x

13. Chemical Efficacy of Early Square Removal and Subsequent Productivity of Superokra-Leaf Cotton

Author:
C. W. Kennedy; W. C. Smith; J. E. Jones
Source:
Crop science 1991 v.31 no.3 pp. 791-796
ISSN:
0011-183X
Subject:
cultivars; canopy; abscission; Gossypium hirsutum; early development; plant characteristics; ethylene production; height; chemical pruning; silver nitrate; yield components; ethephon; bolls; fruiting; vegetative growth
Abstract:
... Delaying fruit set of superokra-leaf cotton (Gossypium hirsutum L.) can potentially improve yields and provide an excellent trap-crop system for boll weevil (Anthonomus grandis Boh.) management if a practical means of early-season square removal could be obtained. We determined the efficacy of ethephon (2-chloroethylphosphonic acid) applications on removing early squares, effectiveness of Ag⁺ at r ...
DOI:
10.2135/cropsci1991.0011183X003100030050x

14. Pre-ripening damage to cottonseed by Aspergillus flavus is not influenced by seed coat permeability

Author:
Halloin, J.M.; Lee, L.S.; Cotty, P.J.
Source:
Journal of the American Oil Chemists' Society 1991 v.68 no.7 pp. 522-523
ISSN:
0003-021X
Subject:
cultivars; testa; infection; Gossypium hirsutum; aflatoxins; dehiscence; seed quality; seed maturation; permeability; bolls; Aspergillus flavus
Abstract:
... Infetion of cottonseed (Gossypium hirsutum L.) by Aspergillus flavus and associated production of aflatoxins are problems in the arid portions of the United States cotton belt. The hard seed (impermeable to water) characteristic confers resistance to these problems in ripened cottonseed. Experiments were done to determine if low seed coat permeability to water or impermeability protect developing ...
DOI:
10.1007/BF02663827

15. Productivity and Tobacco Budworm Resistance of Cotton Developed between 1890 and 1986

Author:
Tommy F. Wharton; Johnie N. Jenkins; J. C. McCarthy; W. L. Parrott
Source:
Crop science 1991 v.31 no.1 pp. 29-32
ISSN:
0011-183X
Subject:
Helicoverpa zea; Gossypium hirsutum; pest resistance; crop yield; lint cotton; bolls; cultivars; genetic resistance
Abstract:
... There is a paucity of information on the relationships between modern (i.e., released in or after 1978) and historically obsolete cotton (Gossypium hirsutum L.) cultivars with respect to their ability to yield when grown in the presence of high levels of tobacco budworm (TBW), Heliothis virescens F. The objective of this study was to compare 18 cultivars of cotton developed between 1890 and 1986 f ...
DOI:
10.2135/cropsci1991.0011183X003100010006x

16. Reduction in Insecticide Use Associated with Cotton Resistant to Pink Bollworm

Author:
F. Douglas Wilson; Hollis M. Flint; Louis A. Bariola; Chang Chi Chu
Source:
Crop science 1991 v.31 no.2 pp. 363-366
ISSN:
0011-183X
Subject:
Pectinophora gossypiella; cultivars; insect pests; application timing; lint cotton; insecticides; genetic resistance; application rate; Gossypium hirsutum; early development; crop yield; ethephon; fiber quality; pest resistance; bolls
Abstract:
... Cotton (Gossypium hirsutum L.) growers use significant quantities of insecticides to control pink bollworm (PBW), Pectinophora gossypiella (Saunders). The germplasm line WC-12NL (nectariless, okra leaf, and early maturing) and ‘Deltapine 61’ (nectaried, normal leaf, and later maturing) were grown at Maricopa, AZ, and Brawley, CA, for three seasons. Irrigation water was terminated and plots were de ...
DOI:
10.2135/cropsci1991.0011183X003100020028x

17. Mepiquat Chloride and Irrigation versus Cotton Growth and Development

Author:
V. R. Reddy; A. Trent; B. Acock
Source:
Agronomy journal 1992 v.84 no.6 pp. 930-933
ISSN:
0002-1962
Subject:
height; plant characteristics; Gossypium hirsutum; vegetative growth; early development; fruiting; irrigation scheduling; soil water content; crop yield; bolls; cultivars; mepiquat; Mississippi
Abstract:
... Cotton (Gossypium hirsutum L.) produces excessive vegetative growth when grown under optimum water and nutrient conditions. The plant growth regulator Mepiquat Chloride (MC); 1,l-dimethyl piperidinium chloride reduces vegetative growth and can promote early maturity. Its effect on yield has been inconsistent, with some researchers showing an increase while others have indicated a decrease. This va ...
DOI:
10.2134/agronj1992.00021962008400060004x

18. Season Length and Cultivar Determine the Optimum Evapotranspiration Deficit in Cotton

Author:
F. Orgaz; L. Mateos; E. Fereres
Source:
Agronomy journal 1992 v.84 no.4 pp. 700-706
ISSN:
0002-1962
Subject:
Gossypium hirsutum; cultivars; maturity stage; irrigated conditions; evapotranspiration; sprinkler irrigation; crop yield; bolls; dry matter accumulation; seeds; irrigation scheduling; seasonal development; duration; Spain
Abstract:
... In areas where the growing-season length limits cotton (Gossypium hirsutum L.) production, irrigation practices that meet the maximum evapotranspiration (ET) demand have been shown to promote excessive vegetative growth and to reduce yield. Past experiments using limited irrigation in cotton do not provide generalized information on the magnitude of ET deficits that optimize lint yields, however. ...
DOI:
10.2134/agronj1992.00021962008400040031x

19. Temperature Effects on Cotton Fruit Retention

Author:
K. R. Reddy; H. F. Hodges; V. R. Reddy
Source:
Agronomy journal 1992 v.84 no.1 pp. 26-30
ISSN:
0002-1962
Subject:
cultivars; buds; abscission; Gossypium hirsutum; air temperature; flowers; environmental factors; bolls; fruiting
Abstract:
... Temperature is a major environmental factor that affects cotton (Gossypium hirsutum L.) production. Temperatures of 35 to 40°C are frequently observed in cotton-producing areas. High-temperature environments are sometimes associated with cotton sterility and boll retention problems; however, there is little specific information available on cotton sensitivity to temperature. We conducted a series ...
DOI:
10.2134/agronj1992.00021962008400010006x

20. Cotton Boll Retention and Its Relationship to Lint Yield

Author:
James J. Heitholt
Source:
Crop science 1993 v.33 no.3 pp. 486-490
ISSN:
0011-183X
Subject:
Gossypium hirsutum; cultivars; genetic variation; bolls; abscission; fruiting; crop yield; lint cotton; genotype
Abstract:
... Fruit retention helps determine cotton (Gossypium hirsutum L.) yield. Study objectives were to (i) characterize genotypic variation in whole-plant boll retention percentage, (ii) determine the relationship between retention and lint yield, and (iii) characterize timing, stage, and frequency of fruiting-form abscission over two seasons in eight field-grown genotypes: normal-, sub okra., okra-, and ...
DOI:
10.2135/cropsci1993.0011183X003300030014x

21. F2 Hybrids of Host Plant Germplasm and Cotton Cultivars: I. Heterosis and Combining Ability for Lint Yield and Yield Components

Author:
Bing Tang; Johnie N. Jenkins; J. C. McCarty; C. E. Watson
Source:
Crop science 1993 v.33 no.4 pp. 700-705
ISSN:
0011-183X
Subject:
germplasm; cultivars; plant breeding; heterosis; hybrids; lint cotton; Gossypium hirsutum; general combining ability; disease resistance; yield components; pest resistance; bolls; specific combining ability
Abstract:
... Although pest-resistant cotton (Gossypium hirsutum L.) germplasm is available, it is generally not equal to adapted cultivars and other elite germplasm in yield. Cotton F₂ hybrids could provide a means to combine beneficial traits of high-yielding adapted cultivar (elite) germplasm with those of pest-resistant germplasms. In the F₂ heterosis and combining ability were studied for lint yield and th ...
DOI:
10.2135/cropsci1993.0011183X003300040012x

22. Late Season Water Stress in Cotton: I. Plant Growth, Water Use, and Yield

Author:
T. J. Gerik; K. L. Faver; P. M. Thaxton; K. M. El-Zik
Source:
Crop science 1996 v.36 no.4 pp. 914-921
ISSN:
0011-183X
Subject:
cultivars; Gossypium hirsutum; soil water regimes; drought tolerance; leaf area index; water stress; dry matter partitioning; yield components; water uptake; bolls
Abstract:
... The behavior of water stressed cotton (Gossypium hirsutum L.) is well documented but our knowledge of traits which can be genetically manipulated to improve drought tolerance is incomplete. This study was conducted to determine which morphological and physiological factors lessen the effects of water stress on the yield of two short-season cultivars [i.e., TAMCOT HQ95 (HQ95)and (G&P 74+ (GP74)] wi ...
DOI:
10.2135/cropsci1996.0011183X003600040017x

23. Resistance of Cotton with δ-Endotoxin Genes from Bacillus thuringiensis var. kurstaki on Selected Lepidopteran Insects

Author:
Johnie N. Jenkins; Jack C. McCarty; Robert E. Buehler; Jack Kiser; Curtis Williams; Tom Wofford
Source:
Agronomy journal 1997 v.89 no.5 pp. 768-780
ISSN:
0002-1962
Subject:
Gossypium hirsutum; Bacillus thuringiensis subsp. kurstaki; transgenic plants; gene expression; agronomic traits; pest resistance; Heliothis virescens; Helicoverpa zea; crop yield; crossing; cultivars; genetic engineering; larvae; weight; leaves; bolls; lint cotton; Spodoptera frugiperda; genotype
Abstract:
... Transgenic cotton (Gossypium hirsutum L.) plants that express truncated versions of insect control protein genes cryIA (c) and cryIIA of Bacillus thuringiensis Berliner var. kurstaki (Bt) have been developed for managing lepidopteran pests. However, agronomic traits and pest resistance can vary among transformation events. We examined selected agronomic traits and resistance, in laboratory and fie ...
DOI:
10.2134/agronj1997.00021962008900050010x

24. Photosynthate and Dry Matter Partitioning in Short- and Long-Season Cotton Cultivars

Author:
P. F. Pace; Harry T. Cralle; J. Tom Cothren; Scott A. Senseman
Source:
Crop science 1999 v.39 no.4 pp. 1065-1069
ISSN:
0011-183X
Subject:
Gossypium hirsutum; dry matter partitioning; early development; cultivars; source-sink relationships; bolls; stems; leaves; field experimentation; isotope labeling; carbon; starch; sexual reproduction; photosynthates; Texas
Abstract:
... Differences in source-sink relationships between short- and long-season cotton (Gossypium hirsutum L.) cultivars, the contribution of main stem leaves to boll growth, and the distribution of nonstructural carbohydrates late in the season are not well understood. This study compared the cultivars Tamcot CAMD-E (a short-season type) and Stoneville 213 (a long-season type) for two seasons in the fiel ...
DOI:
10.2135/cropsci1999.0011183X003900040018x

25. Sowing date and insecticide trails with selected multi-adversity resistant cotton varieties in the Northern Guinea Savanna of Nigeria

Author:
Kuchinda, N.C.; Onu, I.; Echekwu, C.
Source:
Journal of sustainable agriculture 2002 v.20 no.1 pp. 5-15
ISSN:
1044-0046
Subject:
height; plant characteristics; Gossypium hirsutum; cultivars; pest resistance; field experimentation; crop yield; bolls; cypermethrin; genetic resistance; sowing date; Nigeria
Abstract:
... Field Trials were conducted during the wet seasons of 1996-1998 on the farm of the Institute for Agricultural Research, Samaru to evaluate some selected multi-adversity resistant varieties of cotton (Gossypium hirstum L.) grown under three sowing dates and insecticide sprayed and unsprayed conditions. The use of insecticide reduced leaf roller (Sylepta derogata) incidence and improved the growth a ...
DOI:
10.1300/J064v20n01_03

26. Distribution of bollworm, Helicoverpa zea (Boddie), injured reproductive structures on genetically engineered Bacillus thuringiensis var. kurstaki Berliner cotton

Author:
Gore, J.; Leonard, B.R.; Gable, R.H.
Source:
Journal of economic entomology 2003 v.96 no.3 pp. 699-705
ISSN:
0022-0493
Subject:
cotton; Helicoverpa zea; cultivars; pest management; insect pests; buds; Gossypium hirsutum; transgenic plants; economic threshold; Bacillus thuringiensis subsp. kurstaki; crop damage; flowers; crystal proteins; genetic engineering; larvae; bolls
DOI:
10.1093/jee/96.3.699
PubMed:
12852607

27. Experimental assessment of the impact of defoliation on growth and production of water-stressed maize and cotton plants

Author:
Yang, Z.; Midmore, D.J.
Source:
Experimental agriculture 2004 v.40 no.2 pp. 189-199
ISSN:
0014-4797
Subject:
Zea mays; corn; Gossypium hirsutum; lint cotton; cultivars; defoliation; plant growth; grain yield; water stress; soil water regimes; seed productivity; bolls; fruiting; leaves; stomatal conductance; photosynthesis; shoots; dry matter accumulation; Australia
Abstract:
... In this study, different levels of defoliation were imposed on a determinate species (maize) and a relatively indeterminate species (cotton). The aim was to quantify the effects of defoliation on plant growth and production, under either optimum or water-stressed conditions. Under well-watered conditions, 33% defoliation twice (conducted 28 and 35 days after emergence) resulted in a 16% reduction ...
DOI:
10.1017/S0014479703001534

28. Fiber length development in near-long staple upland cotton

Author:
Braden, C.A.; Smith, C.W.
Source:
Crop science 2004 v.44 no.5 pp. 1553-1559
ISSN:
0011-183X
Subject:
cotton; weight; cultivars; flowering; staple (fibers); Gossypium hirsutum; fiber crops; crop yield; genotype; length; genetic variation; heritability; bolls; Texas
Abstract:
... Advanced Fiber Information System (AFIS) mean fiber length by weight (L(w)), fiber length development period (FLDP), and average daily fiber length growth rates (ADGR) were determined for four experimental strains and three cultivars of upland cotton, Gossypium hirsutum L., in 1998 and 1999 in College Station, TX. TAM 94L-25 and TAM 94M-14, near-long staple sib lines developed by the Texas Agricul ...

29. Influence of potassium rates and sources on seed cotton yield and yield components of some elite cotton cultivars

Author:
Pervez, H.; Ashraf, M.; Makhdum, M.I.
Source:
Journal of plant nutrition 2004 v.27 no.7 pp. 1295-1317
ISSN:
0190-4167
Subject:
Cambisols; Gossypium hirsutum; Haplocambids; bolls; cultivars; fertilizer rates; field experimentation; leaves; potassium; potassium chloride; potassium fertilizers; potassium sulfate; seed cotton; silt loam soils; yield components; Pakistan
Abstract:
... A field experiment was conducted at Central Cotton Research Institute, Multan, Pakistan on Miani soil series, silt loam soil (Calcaric, Cambisols and fine silty, mixed Hyperthermic Fluventic Haplocambids) to assess the response of four cotton (Gossypium hirsutum L.) cultivars to potassium (K) fertilization. The treatments consisted of four cotton cultivars (CIM-448, CIM-1100, NIAB-Karishma, S-12), ...
DOI:
10.1081/PLN-120038549

30. Response of late-planted cotton to the application of a growth regulator (chlorocholine chloride, Cycocel 75)

Author:
Mondino, M.H.; Peterlin, O.A.; Garay, F.
Source:
Experimental agriculture 2004 v.40 no.3 pp. 381-387
ISSN:
0014-4797
Subject:
planting date; cultivars; plant growth; Gossypium hirsutum; plant growth substances; air temperature; chlorides; dry matter accumulation; height; bolls; growing season; harvest index; stem nodes; fiber quality; spraying; seed cotton; Argentina
Abstract:
... The influence of a growth regulator, chlorocholine chloride (commercial name Cycocel 75) on plant growth, (yield) and quality of late-seeded (mid-December) cotton (Gossypium hirsutum) was studied in the Rio Dulce Irrigation Area, northwest Argentina, during three growth cycles (1998-2001). Cycocel 75 reduced plant height and node number as well as the total production of aerial biomass, thus incre ...
DOI:
10.1017/S0014479704002017

31. The influence of defoliation timing on yields and quality of two cotton cultivars

Author:
Faircloth, J.C.; Edmisten, K.L.; Wells, R.; Stewart, A.M.
Source:
Crop science 2004 v.44 no.1 pp. 165-172
ISSN:
0011-183X
Subject:
cultivars; application timing; lint cotton; Gossypium hirsutum; crop yield; defoliation; fiber quality; bolls
Abstract:
... The timing of certain cotton (Gossypium hirsutum L.) management practices varies according to the yield potential and quality characteristics associated with a variety. A defoliation timing study was performed to (i) determine if certain cultivars respond differently to defoliation timings and (ii) compare the use of the open boll percentage at defoliation (OBPD), nodes above cracked boll (NACB), ...

32. Evaluation of five most commonly grown cotton cultivars (Gossypium hirsutum L.) under mediterranean conditions: productivity and fibre quality

Author:
Avgoulas, C.; Bouza, L.; Koutrou, A.; Papadopoulou, S.; Kosmas, S.; Makridou, E.; Papastylianou, P.; Bilalis, D.
Source:
Journal of agronomy and crop science 2005 v.191 no.1 pp. 1-9
ISSN:
0931-2250
Subject:
cultivars; crop quality; staple (fibers); Gossypium hirsutum; strength (mechanics); crop yield; genotype-environment interaction; weather; bolls; seed cotton; Mediterranean climate; Greece
DOI:
10.1111/j.1439-037X.2004.00139.x

33. Phenological and morphological components of cotton crop maturity

Author:
Bednarz, C.W.; Nichols, R.L.
Source:
Crop science 2005 v.45 no.4 pp. 1497-1503
ISSN:
1435-0653
Subject:
cotton; cultivars; flowering; Gossypium hirsutum; phenology; fruiting; fiber crops; crop yield; dry matter partitioning; maturity groups; stem nodes; plant morphology; bolls; Georgia
Abstract:
... Full season cotton (Gossypium hirsutum L.) cultivars may be better adapted to the lower southeastern USA because early maturing cultivars may not recover from the many episodic drought events that annually plague the region. The objective of this investigation was to determine if cotton maturity may be defined on the basis of flowering interval, boll maturation period, or whole plant yield distrib ...

34. Boll distribution patterns in Bt and non-Bt cotton cultivars: I. Study on commercial irrigated farming systems in South Africa

Author:
Hofs, J.L.; Hau, B.; Marais, D.
Source:
Field crops research 2006 v.98 no.2-3 pp. 203-209
ISSN:
0378-4290
Subject:
cotton; Helicoverpa zea; cultivars; isogenic lines; insect pests; profitability; irrigation; Gossypium hirsutum; transgenic plants; spatial distribution; plant-incorporated protectants; farming systems; fruiting; plant pests; agronomic traits; crop yield; Bacillus thuringiensis; bolls; South Africa
DOI:
10.1016/j.fcr.2006.01.006

35. Boll distribution patterns in Bt and non-Bt cotton cultivars: II. Study on small-scale farming systems in South Africa

Author:
Hofs, J.L.; Hau, B.; Marais, D.; Fok, M.
Source:
Field crops research 2006 v.98 no.2-3 pp. 210-215
ISSN:
0378-4290
Subject:
Helicoverpa zea; profitability; small-scale farming; spatial distribution; crop yield; Gossypium hirsutum; plant-incorporated protectants; farm income; plant pests; Bacillus thuringiensis; cultivars; isogenic lines; insect pests; dryland farming; bolls; cotton; transgenic plants; intensive cropping; agronomic traits; fruiting; South Africa
DOI:
10.1016/j.fcr.2006.01.007

36. Plant Density Modifications of Cotton Within-Boll Yield Components

Author:
Craig W. Bednarz; Robert L. Nichols; Steve M. Brown
Source:
Crop science 2006 v.46 no.5 pp. 2076-2080
ISSN:
0011-183X
Subject:
cotton; cultivars; seeds; surface area; Gossypium hirsutum; plant density; seed productivity; yield components; mass; crop management; fiber quality; bolls
Abstract:
... One approach to improving cotton (Gossypium hirsutum L.) yield and quality is to identify crop management practices that may exploit the most basic (i.e., within-boll) yield components. One of the parameters that may influence within-boll yield components is plant density. Thus, the objectives of this investigation were to determine how yield components in cotton are altered through plant density ...
DOI:
10.2135/cropsci2005.12.0493

37. Yield, Boll Distribution and Fibre Quality of Hybrid Cotton (Gossypium hirsutum L.) as influenced by Organic and Modern Methods of Cultivation

Author:
Blaise, D.
Source:
Journal of agronomy and crop science 2006 v.192 no.4 pp. 248-256
ISSN:
0931-2250
Subject:
Gossypium hirsutum; cotton; fiber crops; crop yield; fiber quality; hybrids; cultivars; organic production; dryland farming; insecticides; pesticide application; insect control; diameter; soil organic matter; soil aggregates; insect pests; plant pests; bolls; branches; stem nodes; planting date; India
Abstract:
... India is the largest cotton-growing country (8.9 million hectares) in the world and most of the area is rain-dependent. Large amount of pesticides are used for the control of sucking pests and lepidopterans. Increasing demand for clean organic fibre has led to an interest in organic cotton. However, information on the effects of organic cultivation on fibre quality is limited. Seed cotton yield an ...
DOI:
10.1111/j.1439-037X.2006.00218.x

38. The impact of introducing the Bacillus thuringiensis gene into cotton on boll nitrogen metabolism

Author:
Zhang, X.; Zhang, L.; Ye, G.; Wang, Y.; Chen, Y.; Chen, D.
Source:
Environmental and experimental botany 2007 v.61 no.2 pp. 175-180
ISSN:
0098-8472
Subject:
Gossypium hirsutum; cotton; Bacillus thuringiensis; transgenic plants; plant-incorporated protectants; nitrogen metabolism; bolls; plant growth; cultivars; hybrids; nitrogen content; free amino acids; protein content; flowering; phenology; enzyme activity; alanine transaminase; aspartate transaminase; proteinases; China
Abstract:
... Changes in vegetative and reproductive growth have been widely observed in Bacillus thuringiensis (Bt) transgenic cotton. The objective of this study was to investigate the characteristics of boll nitrogen metabolism of Bt cotton cultivars to gain a better physiological understanding of the observed phenomenon. The study was undertaken on two Bt transgenic cotton cultivars and their parents, one c ...
DOI:
10.1016/j.envexpbot.2007.05.008

39. Temperature-mediated developmental delay may limit yield of cotton in relay intercrops with wheat

Author:
Zhang, L.; van der Werf, W.; Zhang, S.; Li, B.; Spiertz, J.H.J.
Source:
Field crops research 2008 v.106 no.3 pp. 258-268
ISSN:
0378-4290
Subject:
sowing date; soil temperature; seedlings; wheat; plant competition; field experimentation; Gossypium hirsutum; fruit set; Triticum aestivum; straw mulches; relay cropping; cultivars; air temperature; crop rotation; bolls; cotton; plastic film; canopy; heat sums; lint yield; China
Abstract:
... In the Yellow River valley of China, more then 1.4millionha of cotton are grown as relay intercrops with wheat. Cotton is sown in April when winter wheat is already in the reproductive phase; thus, a wheat crop with a fully developed canopy will compete for resources with cotton plants in the seedling stage. Yields of cotton are lower in relay intercropping systems than in a monocrop, but the aggr ...
DOI:
10.1016/j.fcr.2007.12.010

40. Boll size affects the insecticidal protein content in Bacillus thuringiensis (Bt) cotton

Author:
Wang, Yonghui; Ye, Guoyou; Luan, Na; Xiao, Jian; Chen, Yuan; Chen, Dehua
Source:
Field crops research 2009 v.110 no.2 pp. 106-110
ISSN:
0378-4290
Subject:
Gossypium hirsutum; cotton; bolls; transgenic plants; insecticidal proteins; crystal proteins; protein content; Bacillus thuringiensis; plant-incorporated protectants; cultivars; fruiting; genetic variation; seeds; weight; China
Abstract:
... Bacillus thuringiensis (Bt) transgenic cotton has been planting in large-scale for more than 10 years in China. It was observed that resistance to bollworm was reduced with the application of big-boll cultivars in China. The objective of the study was to investigate the effects of boll size on the contents of CryIA insecticidal protein in boll shell and cotton seed during the course of boll develo ...
DOI:
10.1016/j.fcr.2008.07.008

41. Combining ability analysis to identify suitable parents for heterosis in seed cotton yield, its components and lint % in upland cotton

Author:
Khan, Naqib Ullah; Hassan, Gul; Kumbhar, Moula Bux; Marwat, Khan Bahadar; Khan, Muhammad Azim; Parveen, Aisha; Umm-e-Aiman; Saeed, Muhammad
Source:
Industrial crops and products 2009 v.29 no.1 pp. 108-115
ISSN:
0926-6690
Subject:
weight; heterosis; cultivars; hybrids; lint cotton; Gossypium hirsutum; general combining ability; crossing; agronomic traits; genotype; genetic variance; inbreeding depression; genes; parentage; bolls; seed cotton; lint yield; specific combining ability
Abstract:
... Combining ability and heterosis were studied in a 6x6 diallel cross to see the nature of gene action in Upland cotton (Gossypium hirsutum L.) during 2002 to 2004. Analysis of variance revealed highly significant differences among all the F₁ and F₂ hybrid means and their respective six parental values for all the traits examined. In both generations, the mean squares due to general combining abilit ...
DOI:
10.1016/j.indcrop.2008.04.009

42. Effects of Deficit Drip Irrigation Ratios on Cotton (Gossypium hirsutum L.) Yield and Fibre Quality

Author:
Basal, H.; Dagdelen, N.; Unay, A.; Yilmaz, E.
Source:
Journal of agronomy and crop science 2009 v.195 no.1 pp. 19-29
ISSN:
0931-2250
Subject:
cotton; cultivars; plant available water; diameter; staple (fibers); Gossypium hirsutum; water use efficiency; microirrigation; deficit irrigation; irrigation rates; yield components; fiber quality; bolls; Turkey (country)
Abstract:
... Increasing irrigation costs and declining water availability compel producers to adapt irrigation strategies for maximum crop yield and water use efficiency. A field trial was conducted to observe the effects of various drip irrigation ratios (IR-0, IR-25, IR-50, IR-75 and IR-100) on water use efficiency (WUE), the irrigation water use efficiency (IWUE), lint yield, yield components and fibre qual ...
DOI:
10.1111/j.1439-037X.2008.00340.x

43. Effects of ozone fumigation on cotton (Gossypium hirsutum L.) morphology, anatomy, physiology, yield and qualitative characteristics of fibers

Author:
Zouzoulas, Demetrius; Koutroubas, Spyridon D.; Vassiliou, George; Vardavakis, Emmanuel
Source:
Environmental and experimental botany 2009 v.67 no.1 pp. 293-303
ISSN:
0098-8472
Subject:
corolla; necrosis; crop yield; pollen; plant damage; stomatal conductance; Gossypium hirsutum; elevated atmospheric gases; chlorosis; photosynthesis; fiber quality; cultivars; chlorophyll; lint cotton; seeds; bracts; leaf area; ozone; lighting; seedling emergence; bolls; fumigation; trichomes; strength (mechanics); stomata; plant morphology
Abstract:
... This experiment was conducted to study the effect of high ozone concentrations on two cotton (Gossypium hirsutum L.) cultivars. Two cotton cultivars (Romanos and Allegria) were exposed to control (CF<4ppbO₃) and 100ppbO₃. Plant exposure to ozone began eight days after emergence and was interrupted one day before removing the leaves, to calculate the leaf area. Plants were exposed to ozone 7h/day, ...
DOI:
10.1016/j.envexpbot.2009.05.016

44. Quantitative trait loci controlling plant architectural traits in cotton

Author:
Song, Xianliang; Zhang, Tianzhen
Source:
Plant science 2009 v.177 no.4 pp. 317-323
ISSN:
0168-9452
Subject:
height; crop yield; genetic markers; quantitative trait loci; backcrossing; hybrids; Gossypium hirsutum; genotype; phenotypic variation; fiber quality; cultivars; epistasis; genotype-environment interaction; branches; bolls; cotton; plant architecture; internodes; Gossypium barbadense; environmental factors; agronomic traits; linkage (genetics)
Abstract:
... Cotton plant architecture is an important characteristic influencing the suitability of specific cotton varieties in cultivation, fiber yield and quality. However, complex multigenic relationships and substantial genotype-environment interaction underlie plant architecture, and will hinder the efficient improvement of these traits in conventional cotton breeding programs. An enhanced understanding ...
DOI:
10.1016/j.plantsci.2009.05.015

45. Sucrose metabolism in cotton (Gossypium hirsutum L.) fibre under low temperature during fibre development

Author:
Shu, Hongmei; Zhou, Zhiguo; Xu, Naiyin; Wang, Youhua; Zheng, Mi
Source:
European journal of agronomy 2009 v.31 no.2 pp. 61-68
ISSN:
1161-0301
Subject:
cotton; carbohydrate metabolism; cultivars; sowing date; flowering; sucrose-phosphate synthase; Gossypium hirsutum; sucrose; air temperature; cold stress; phenology; cellulose; biochemical pathways; beta-fructofuranosidase; enzyme activity; bolls; sucrose synthase; China
Abstract:
... The effects of low temperature on sucrose content and activities of key enzymes related to sucrose metabolism in cotton (Gossypium hirsutum L.) fibre were investigated. Two cotton cultivars, Kemian 1 and Sumian 15, were grown in the field at two sowing dates in 2006 and three sowing dates in 2007, the differences of environmental conditions during fibre development period (from flowering date to b ...
DOI:
10.1016/j.eja.2009.03.004

46. Effect of cotton cultivars on the oviposition preference of pink bollworm (Lepidoptera: Gelechiidae)

Author:
Chatzigeorgiou, A. C.; Papadopoulos, N. T.; Prophetou-Athanasiadou, D. A.
Source:
Journal of pest science 2010 v.83 no.3 pp. 289-296
ISSN:
1612-4758
Subject:
Gossypium hirsutum; Pectinophora gossypiella; bolls; calyx; cotton; cultivars; cultivation area; eggs; females; nectaries; oviposition; petioles; trichomes
Abstract:
... The effect of four cotton cultivars on the oviposition behavior of the pink bollworm Pectinophora gossypiella (Saunders) was studied under laboratory and semi-field conditions. Young plants and bolls from four commercial upland cotton cultivars (Lachata, Macnair-220, Midas and Sandra) cultivated in the area of Thessaloniki were used. The four cultivars had palmate leaves, and nectaries on both lea ...
DOI:
10.1007/s10340-010-0297-2

47. Comparative expression of miRNA genes and miRNA-based AFLP marker analysis in cultivated tetraploid cottons

Author:
Mingxiong Pang; Chaozhu Xing; Nick Adams; Laura Rodriguez-Uribe; S.E. Hughs; Stephen F. Hanson; Jinfa Zhang
Source:
Journal of plant physiology 2011 v.168 no.8 pp. 824-830
ISSN:
0176-1617
Subject:
Gossypium barbadense; Gossypium hirsutum; amplified fragment length polymorphism; bolls; cotton; cultivars; gene expression; gene expression regulation; gene targeting; genes; genetic variation; genotype; growth and development; microRNA; plant growth control; tetraploidy
Abstract:
... MicroRNAs (miRNAs) are a class of small non-coding RNAs that down-regulate gene expression in a sequence specific manner to control plant growth and development. The identification and characterization of miRNAs are critical steps in finding their target genes and elucidating their functions. The objective of the present study was to assess the genetic variation of miRNA genes through expression c ...
DOI:
10.1016/j.jplph.2010.10.006
PubMed:
21134704

48. Effects of Irrigation, Cultivar, and Plant Density on Cotton Within-Boll Fiber Quality

Author:
Lu Feng; Vinicius B. Bufon; Cory I. Mills; Eric Hequet; James P. Bordovsky; Wayne Keeling; Randy Boman; Craig W. Bednarz
Source:
Agronomy journal 2011 v.103 no.2 pp. 297-303
ISSN:
0002-1962
Subject:
Gossypium hirsutum; advanced fiber information system; bolls; cotton; cultivars; fiber quality; field experimentation; fineness; fruiting; irrigation rates; manual harvesting; plant density; rain
Abstract:
... This study was designed to determine how within-boll fiber quality of cotton (Gossypium hirsutum L.) is affected through irrigation, cultivar, and plant density management. Field experiments were conducted in 2006 and 2007 using two contemporary cultivars, arranged in a split-split plot design with two irrigation rates (6.33 and 4.32 mm d⁻¹) as the main plot, plant density (79,071; 128,490; 197,67 ...
DOI:
10.2134/agronj2010.0185

49. Genetic Improvement of the Pee Dee Cotton Germplasm Collection following Seventy Years of Plant Breeding

Author:
B. T. Campbell; P. W. Chee; E. Lubbers; D. T. Bowman; W. R. Meredith; J. Johnson; D. E. Fraser
Source:
Crop science 2011 v.51 no.3 pp. 955-968
ISSN:
0011-183X
Subject:
germplasm; cultivars; diploidy; lint cotton; Gossypium hirsutum; genetic improvement; Gossypium barbadense; agronomic traits; genetic variation; fiber quality; bolls; lint yield; United States
Abstract:
... One of the most significant, long-term public U.S. Upland cotton (Gossypium hirsutum L.) germplasm enhancement programs is known as the Pee Dee germplasm program. The unique, genetic foundation of the Pee Dee germplasm was created using germplasm from Upland, Sea Island (Gossypium barbadense L.), and primitive diploid cottons. Since the program's inception in 1935, the Pee Dee germplasm program ha ...
DOI:
10.2135/cropsci2010.09.0545

50. In vitro induction of mutation in cotton (Gossypium hirsutum L.) and isolation of mutants with improved yield and fiber characters

Author:
Annamalai Muthusamy; Narayanasamy Jayabalan
Source:
Acta physiologiae plantarum 2011 v.33 no.5 pp. 1793-1801
ISSN:
0137-5881
Subject:
Gossypium hirsutum; bolls; cellulose; cotton; cultivars; field experimentation; flowering; gamma radiation; genetic variation; harvest index; mutants; mutation; ovules; seeds
Abstract:
... This paper describes a protocol to develop cotton mutant lines with improved yield and fiber characters. Immature ovules [(15-day post-anthesis ovules (dap)] were irradiated with 10–50 Gy gamma rays and treated with 1–5 mM EMS and SA to investigate the stimulatory effects of mutagenic treatments. During the subsequent field trials, the mutant lines showed significant variations from control ...
DOI:
10.1007/s11738-011-0718-8