scholarly journals Methods for evaluating protein and oil in soybeans and mass selection by seed size and specific gravity in soybean populations

1967 ◽  
Author(s):  
Walter Ronald Fehr
Keyword(s):  
Specific Gravity ◽  
Seed Size ◽  
Mass Selection

Improving the Quality of a Groundnut Population in Zambia by Bulk Selection of Seed

1974 ◽  
Vol 10 (3) ◽  
pp. 185-192 ◽  
Author(s):  
R. L. Thomas ◽  
A. J. Prior ◽  
J. E. Grafius
Keyword(s):  
Seed Size ◽  
Total Yield ◽  
Substantial Improvement ◽  
Mass Selection ◽  
Large Seed ◽  
Mean Size ◽  
Pedigree Selection ◽  
Positive Correlations ◽  
Selection Of

SUMMARYSubstantial improvement is reported in a quality measure, large seed size, after only one generation of mass selection from a bulk ‘Chalimbana’ population of Zambian land races of the inbred species Arachis hypogaea L. There were large positive correlations between seed size as planted and the subsequent mean size harvested. Large seed also tended to produce an increased proportion of 2- rather than 3-seeded pods, further improving both crop uniformity and quality. Total yield was unaffected, or possibly even slightly enhanced, by planting larger kernels. The circumstantial advantages of mass as opposed to pedigree selection methods are discussed.

SPECIFIC GRAVITY OF SEEDS AS A MASS SELECTION CRITERIAN IN CASHEW

1985 ◽  
pp. 277-277
Author(s):  
M.A. MENON ◽  
P.N. RAVINDRAN ◽  
B.P. NAIR
Keyword(s):  
Specific Gravity ◽  
Mass Selection

Associated changes in the attributes of wheat populations mass-selected for seed size

1973 ◽  
Vol 24 (2) ◽  
pp. 179
Author(s):  
GM Bhatt ◽  
NF Derera
Keyword(s):  
Seed Size ◽  
Kernel Hardness ◽  
Correlated Response ◽  
Mass Selection ◽  
Wheat Protein ◽  
Agronomic Characters ◽  
Economic Significance ◽  
Flour Protein ◽  
Protein Flour ◽  
Selection For

Evaluation of wheat populations mass-selected for seed size was made [or agronomical and quality characters in F2 and FQ generations of the crosses. Estimates of means and variances for these characters and their correlation with seed size were obtained to study the correlated response to selection for seed size. The expression of quality characters (test weight, milling extract, wheat protein, flour protein, and kernel hardness) was found to be independent of the expression of seed size in all the crosses studied. In the case of agronomic characters, however, the crosses behaved differently so far as the correlated response was concerned. It was concluded that in the crosses studied, mass selection for seed size could be practiced with certain associated advantages and without adverse response for most of the characters of economic significance in wheat.

Effects of Seed Size and Weight on Witchweed (Striga asiatica) Seed Germination, Emergence, and Host-Parasitization

Weed Science ◽  
1984 ◽  
Vol 32 (2) ◽  
pp. 202-205 ◽  
Author(s):  
Faiz F. Bebawi ◽  
Robert E. Eplee ◽  
Rebecca S. Norris
Keyword(s):  
Zea Mays ◽  
Seed Germination ◽  
Specific Gravity ◽  
Seed Size ◽  
Root Weight ◽  
Infested Soil ◽  
Striga Asiatica ◽  
Corn Plants

Seed size and weight significantly affected witchweed [Striga asiatica(L.) Kuntze =S. luteaLour. ♯4STRLU] seed germination, witchweed emergence, and host-parasitization. Witchweed seed were divided into four groups for testing; large (> 149 microns in diameter) and heavy (specific gravity greater than one) (LH), large and light (specific gravity less than one) (LL), small (< 125 microns in diameter) and heavy (SH), and small and light (SL). Germination percentages were 87, 84, 58, and 26 for LH, LL, SH, and SL, respectively. Corn (Zea maysL.) was planted in pots containing soil infested with these four seed categories. The total number of witchweed plants (submerged plus emerged) per pot containing LH, LL, SH, and SL witchweed seed was 65, 12, 0, and 0, respectively, and the number of witchweed plants that emerged was 19, 4, 0, and 0 per pot. There were no significant differences in shoot weights of corn grown in the pots either between kinds of witchweed seed infesting the soil or between plants grown in infested soil and plants grown in soil that did not contain witchweed seed. Roots of corn plants grown in soil infested with LH seed were significantly heavier than those grown in soil infested with any other seed class and heavier than those from soil that did not contain witchweed seed. No other seed class significantly affected root weight.

Influence of Seed Quality Upgrading by Processing Machines in Soybean var. DSb-21

2021 ◽  
Author(s):  
Vishwanath . ◽  
Ravi Hunje ◽  
Pavan Shinde
Keyword(s):  
Specific Gravity ◽  
Seed Size ◽  
Seed Quality ◽  
Mechanical Damage ◽  
Soybean Seed ◽  
Processing Unit ◽  
Seedling Vigour ◽  
Seed Processing ◽  
Gravity Separator ◽  
Size Grading

Background: Soybean is the “Miracle crop” of the 21st century due to its nutritional value and multiple uses. Maintenance of soybean seed quality is a major issue as it is more vulnerable to mechanical damage from harvesting to next sowing. Seed processing.by use of individual or combination of machineries will help in getting physically pure, uniform, healthy sound seeds with enhanced planting value. With the advent of new improved varieties, it is advisable to find out the individual or combination of seed processing machines like air screen cleaner, specific gravity and spiral separator to find out the effective and economical seed processing to get maximum recovery with up-graded quality of seeds.Methods: The seeds of soybean var. DSb-21 were used for seed size grading using different sieve sizes and the good seeds obtained from different size grading were processed through specific gravity separator and the good seeds obtained from specific gravity separator were further processed through spiral separator and the processed seeds obtained from these machine combinations were used to assess the seed quality. The seed processing was carried out at Seed Processing Unit and seed quality studies were carried out in the Seed Quality and Research Laboratory, Seed Unit, University of Agricultural Sciences, Dharwad during 2017-18. The experiment was laid in completely randomized design.Result: The influence of sequential processing through seed size grader followed by specific gravity separator and spiral separator on seed quality revealed that, the good seeds obtained from spiral separator after seed grading with recommended sieve size 3.75 mm recorded higher recovery (76.95%), seed germination (89.00%), seedling vigour index (3567) and lower seed mechanical damage (11.67%) followed by 4.00 mm (74.80%, 87.33%, 3418 and 12.33%, respectively) and 4.80 mm (65.64%, 85.00%, 3209 and 13.67%, respectively).

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