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You searched for: Journal name Crop science Remove constraint Journal name: Crop science Publication year rev 8022-1978 Remove constraint Publication year rev: 8022-1978 Source 1978 v.18 no.4 Remove constraint Source: 1978 v.18 no.4
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1. Alfalfa Yield, Specific Leaf Weight, C02 Exchange Rate, and Morphology

Author:
R. H. Hart; R. B. Pearce; N. J. Chatterton; G. E. Carlson; D. K. Barnes; C. H. Hanson
Source:
Crop science 1978 v.18 no.4 pp. 649-653
ISSN:
0011-183X
Subject:
Medicago sativa; alfalfa; carbon dioxide; forage; forage yield; greenhouses; leaf area; leaves; selection index; specific leaf weight
Abstract:
... Alfalfa (Medicago sativa L.) clones differ widely in CO₂ exchange rates (CER) and in specific leaf weights (SLW); CER is correlated with SLW. If high forage yield could be shown to be associated with high CER, selection for high CER or SLW should result in improved forage yield. We selected plants with extremely high or extremely low SLW from several alfalfa populations and measured forage yields ...
DOI:
10.2135/cropsci1978.0011183X001800040031x

2. Effect of Root Media on Growth of Wheat Seminal Roots

Author:
L. O'Brien
Source:
Crop science 1978 v.18 no.4 pp. 685-687
ISSN:
0011-183X
Subject:
plant physiology; plant biochemistry; field crops
Abstract:
... Two wheat (Triticum aestivum L.) cultivars, one semidwarf (‘Israel M68’) and the other conventional height (‘Olympic’) were grown for 10 days in five root media in a growth chamber to determine differences in seminal root growth and the effect of root medium on seminal root growth. Differences were obtained between the cultivars for number of seminal root axes, maximum depth of penetration of the ...
DOI:
10.2135/cropsci1978.0011183X001800040042x

3. Empirical Models for the Analysis of Unreplicated Lattice-Split-Plot Cultivar Trials

Author:
P. L. Cornelius
Source:
Crop science 1978 v.18 no.4 pp. 627-633
ISSN:
0011-183X
Subject:
Zea mays; corn; cultivars; empirical models; fertilizers; plant density; regression analysis
Abstract:
... “Lattice-split-plot“ designs have been devised for the evaluation of a large number, k². of cultivars, the subplot factor, at several levels of another factor which constitutes the main-plot factor. Examples of possible mainplot factors are plant density levels or fertilizer treatments. The arrangement of cultivars within a main plot is that of a lattice design, each plot corresponding to a lattic ...
DOI:
10.2135/cropsci1978.0011183X001800040026x

4. Esterase Isoenzyme Differences in Seed Extracts among Soybean Cultivars

Author:
R. C. Payne; T. J. Koszykowski
Source:
Crop science 1978 v.18 no.4 pp. 557-559
ISSN:
0011-183X
Subject:
plant physiology; plant biochemistry; field crops
Abstract:
... Seed extracts of 44 soybean [Glycine max (L.) Merr.] cultivars were analyzed by polyacrylamide disc electrophoresis for esterase activity. Five esterase isoenzymes were consistently detected in all of the cultivars. There were quantitative differences among cultivars in the activity of the two isoesterases having higher Rf values. These differences should serve as aids in identifying soybean culti ...
DOI:
10.2135/cropsci1978.0011183X001800040007x

5. Evaluation of Grain Sorghum R Lines with a Single-Cross vs. Inbred Line Testers

Author:
W. M. Ross; K. D. Kofoid
Source:
Crop science 1978 v.18 no.4 pp. 670-672
ISSN:
0011-183X
Subject:
plant genetics; plant breeding
Abstract:
... Forty-two Sorghum bicolor (L.) Moench ‘Martin’-‘Wheatland’ three-way crosses and their related single crosses were grown at Mead, Nebr. in 1975 and 1976 to identify superior fertility restoring (R) lines, evaluate the three female testers, and detect possible epistatic effects. The means of the three sets of hybrids differed significantly for date of bloom, plant height, but not grain yield. The m ...
DOI:
10.2135/cropsci1978.0011183X001800040036x

6. Factors Associated with Differential Response of Oat Cultivars to Iron Stress

Author:
J. C. Brown; M. E. McDaniel
Source:
Crop science 1978 v.18 no.4 pp. 551-556
ISSN:
0011-183X
Subject:
chlorosis; cultivars; oats; Texas
Abstract:
... Oat (Arena byzantina C. Koch) cultivars developed differential Fe chlorosis symptoms when grown in field trials on alkaline soils in south Texas. To determine why they differed, ‘TAM 0-312’ (Fe-inefficient), ‘Coker 227’ (Fe-efficlent), and ‘TAM 0-301’ and ‘73C1952’ (intermediate in Fe response) oats were tested in alkaline soils and in nutrient solutions. Physiologically, Coker 227 responded more ...
DOI:
10.2135/cropsci1978.0011183X001800040006x

7. Genetic Variability of Leaf Nutrient Concentration in Oil Palm

Author:
Geok-Yong Tan; J. A. Rajaratnam
Source:
Crop science 1978 v.18 no.4 pp. 548-550
ISSN:
0011-183X
Subject:
Elaeis guineensis; ash content; fertilizers; genetic variation; leaf analysis; leaves; nitrogen content; nutrient content; phenotype; Malaysia
Abstract:
... The objective of this study was to determine the genetic variation of leaf nutrient concentration of eight elements (N, P, K, Mg, Ca, Mn, B, and Cu) and ash content of oil palm (Eₗₐₑᵢₛ gᵤᵢₙₑₑₙₛᵢₛ Jacq.) leaves from 20 single crosses grown in Malaysia. Measurements of general combining ability for both the paternal and maternal lines were significantly different for N, P, and Cu, while only the pat ...
DOI:
10.2135/cropsci1978.0011183X001800040005x

8. Genetic Variation Within Cotton For Seed N and Amino Acid Content

Author:
William R. Meredith; C. D. Elmore; E. E. King
Source:
Crop science 1978 v.18 no.4 pp. 577-580
ISSN:
0011-183X
Subject:
plant genetics; plant breeding; plant physiology; plant biochemistry; field crops
Abstract:
... The objective of this study was to investigate the genetic variability for seed N and amino acid content among currently available cottons (Gossypium hirsutum L.). In 1974 and 1975, 35 cultivars and strains were grown in two replications at Stoneville, Miss. Significant genetic variability was detected for N and eight amino acids in dehulled cottonseed. Seed N ranged from 5.0% for ‘Delfos 9169’ to ...
DOI:
10.2135/cropsci1978.0011183X001800040013x

9. Haploid and Diploid Callus from Cotton Anthers

Author:
Jerry Barrow; Frank Katterman; Dale Williams
Source:
Crop science 1978 v.18 no.4 pp. 619-622
ISSN:
0011-183X
Subject:
Gossypium barbadense; Gossypium hirsutum; anther culture; callus; chromosome number
Abstract:
... We have initiated and subcultured large quantities of callus tissue from the anthers of two species of cotton, Gossypium barbadense L. and G. hirsutum L. A liquid medium was developed and cell suspension cultures were generated from anther-derived callus from G. hirsutum. Cytological examination was made only on anther callus from G. hirsutum and the preponderance of the tissue was diploid (2n=4x= ...
DOI:
10.2135/cropsci1978.0011183X001800040024x

10. Identifying Turgor Responses of Water-Stressed Cotton to Rapid Changes in Net Radiation Using Spectral Analysis

Author:
Jerry M. Davis; Morris G. Huck
Source:
Crop science 1978 v.18 no.4 pp. 605-612
ISSN:
0011-183X
Subject:
plant physiology; plant biochemistry; field crops
Abstract:
... The kinetics of stem shrinkage and swelling in response to changes in the radiation loading of field-grown cotton (Gossyplum hirsutum L.) plants were examined by time series spectral analysis. This technique involves determination in the frequency domain of the relationship between two time series events. The type and degree of relationship a.re assessed by computing the squared coherency, phase, ...
DOI:
10.2135/cropsci1978.0011183X001800040021x

11. Inheritance of Resistance to Pea Seed-borne Mosaic Virus in Lentils

Author:
N. I. Haddad; F. J. Muehlbauer,; R. O. Hampton
Source:
Crop science 1978 v.18 no.4 pp. 613-615
ISSN:
0011-183X
Subject:
plant viruses
Abstract:
... The USDA collection of lentils (Lens culinaris Medic.) was screened for resistance to pea seed-borne mosaic virus (PSbMV); PI lines 212610, 251786, 297745, and 368648 were found to be immune. After inoculation and an incubation period the virus was not recoverable by local lesion assay from the resistant lines, nor did the ,resistant lines develop symptoms or transmit the virus through seeds from ...
DOI:
10.2135/cropsci1978.0011183X001800040022x

12. Inheritance of Some Agronomic Characters in a Cross of Safflower

Author:
B. Ehdaie; A. Ghaderi
Source:
Crop science 1978 v.18 no.4 pp. 544-547
ISSN:
0011-183X
Subject:
plant genetics; plant breeding
Abstract:
... Parents, F₁, F₂, and backcross generations (BC₁ and BC₂) of a cross of safflower, Cₐᵣₜₕₐₘᵤₛ ₜᵢₙcₜₒᵣᵢᵤₛ L., were planted at two locations in Iran (Safiabad and Ahvaz). Data were collected on yield/plant, heads/plant, seeds/head, seed weight, flowering time, and height. Location effects were either significant or highly significant for all traits except for heads/plant. Generation differences were e ...
DOI:
10.2135/cropsci1978.0011183X001800040004x

13. Inheritance of a Second Gene for Brachytic Stem in Soybeans

Author:
H. R. Boerma; B. G. Jones
Source:
Crop science 1978 v.18 no.4 pp. 559-560
ISSN:
0011-183X
Subject:
plant genetics; plant breeding
Abstract:
... The inheritance of a second gene for the control of the brachytic stem trait in soybeans, Glycine max (L.) Merr., was studied. This recessive gene, designated sb₂, was found in the brachytic-stemmed line, PI 227224, when it was crossed with the normal-stemmed cultivar, ‘Davis.’ Classification of plants in the F₁, F₂, and F₃ generations indicated two recessive gene pairs were involved in the expres ...
DOI:
10.2135/cropsci1978.0011183X001800040008x

14. Inhibition of Cowpea Seedling Growth by Methionine Analogs

Author:
Dan W. Dessauer; L. Curtis Hannah
Source:
Crop science 1978 v.18 no.4 pp. 593-597
ISSN:
0011-183X
Subject:
plant genetics; plant breeding; plant physiology; plant biochemistry; field crops
Abstract:
... The effects of reported methionine analogs on seedling growth of cowpea (Vigna unguiculata L.) were studied. L-methionine-DL-sulfoximine (MS) was the most toxic, followed in order by ethionine, a-methyl methionine (MM), and norleucine. Application of methionine protected seedlings from the inhibitory effects of ethionine and MM. Simultaneous addition of lysine and threonine in nutrient solution di ...
DOI:
10.2135/cropsci1978.0011183X001800040018x

15. Interspecific Hybridization in Trifolium L. Section Trifolium Zoh. III. Partially Fertile Hybrids of T. sarosiense Hazsl. ✕ 4x T. alpestre L.

Author:
K. H. Quesenberry; N. L. Taylor
Source:
Crop science 1978 v.18 no.4 pp. 536-540
ISSN:
0011-183X
Subject:
Trifolium pratense; autotetraploidy; backcrossing; diploidy; florets; germination; greenhouses; hybrids; interspecific hybridization; pollen viability; pollination
Abstract:
... Interspecific hybrids of Trifolium sarosiense Hazsl. ✕ 2x and 4x T. alpestre L. were produced by hand pollination in a greenhouse. Pollinations of 530 florets of T. sarosiense (2n = 6x = 48) ✕ T- alpestre (2n = 2x = 16) and 806 florets of the reciprocal produced only five and 10 seeds, respectively. Plants grown from these seeds were weak and chlorotic, and all putative hybrids died before floweri ...
DOI:
10.2135/cropsci1978.0011183X001800040002x

16. Long-Term Preservation of Sorghum Seed as Affected by Seed Moisture, Temperature, and Atmospheric Environment

Author:
L. N. Bass; P. C. Stanwood
Source:
Crop science 1978 v.18 no.4 pp. 575-577
ISSN:
0011-183X
Subject:
plant products; field crops
Abstract:
... Longevity of stored seed is affected by a number of controllable environmental factors. Sorghum bicolor (L.) Moench. seeds were stored in sealed metal cans to test the effects and interactions of three moisture levels, six atmospheric conditions, and five temperature regimes over a 16-year period. Vacuum, and atmospheres of air, nitrogen, carbon dioxide, helium, and argon were not significantly di ...
DOI:
10.2135/cropsci1978.0011183X001800040012x

17. Nitrate Reductase as a Factor Affecting N Assimilation During the Grain Filling Period in Spring Wheat

Author:
Steve R. Simmons; Dale N. Moss
Source:
Crop science 1978 v.18 no.4 pp. 584-586
ISSN:
0011-183X
Subject:
plant physiology; plant biochemistry; field crops
Abstract:
... In 1976 we investigated whether or not nitrate reductase (NR) enzyme activity in shoots of two spring wheat (Triticum aestivum L. em Thell) cultivars limits N assimilation during the grain filling (post anthesis) period. Twice weekly after anthesis NR activities in the flag leaf blade, flag leaf sheath, and first leaf blade below the flag leaf were estimated on field-grown plants with an in vivo a ...
DOI:
10.2135/cropsci1978.0011183X001800040015x

18. Photoperiod and Critical Duration for Flower Induction in Soybean

Author:
S. Shanmugasundaran; Samson C. S. Tsou
Source:
Crop science 1978 v.18 no.4 pp. 598-601
ISSN:
0011-183X
Subject:
plant physiology; plant biochemistry; field crops
Abstract:
... A photoperiod sensitive (sensitive) soybean [Glycine max (L.) Merr.] line and photoperiod in sensitive (insensitive) line were used to determine the critical seedling stage before possible floral induction and the length of photoinduction required for anthesis. Seedlings of each entry were grown in pots and subjected to either a 10- hour or 16-hour photoperiod. Beginning 3 days after emergence, tw ...
DOI:
10.2135/cropsci1978.0011183X001800040019x

19. Photoperiodic Alteration of Dry Matter Partitioning and Seed Yield in Soybeans

Author:
C. David Raper; Judith F. Thomas
Source:
Crop science 1978 v.18 no.4 pp. 654-656
ISSN:
0011-183X
Subject:
plant physiology; plant biochemistry; field crops
Abstract:
... Soybeans [Glycine max (L) Merr. ‘Ramsom’] were grown in controlled environment rooms to evaluate the effects of photoperiod during the seed-fill period on dry motter partitioning and seed yield at maturity. Plants were grown in sand culture with a complete trient solution and at day/night temperatures of 22/18, 26/22, and 30/26 C. Initially, plants were grown under non-inductive long-day photoperi ...
DOI:
10.2135/cropsci1978.0011183X001800040032x

20. Photosynthate Partitioning in Sugarbeet

Author:
F. W. Snyder; G. E. Carlson
Source:
Crop science 1978 v.18 no.4 pp. 657-661
ISSN:
0011-183X
Subject:
plant physiology; plant biochemistry; field crops
Abstract:
... Partitioning of photosynthate to various parts of a crop has a marked influence on economic yield. We used the sugarbeet (Beta vulgaris L.) to investigate quantitatively the effect of this partitioning on growth. Plants were grown for 21 days in the growth chamber. Partitioning was measured indirectly by using the Taproot- Leaf Weight Ratio (TLWR), where TLWR = Taproot fresh weight + Leaf lamina f ...
DOI:
10.2135/cropsci1978.0011183X001800040033x