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Mass Selection by Seed Size and Specific Gravity in Soybean Populations 1
Author(s) -
Fehr W. R.,
Weber C. R.
Publication year - 1968
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1968.0011183x000800050014x
Subject(s) - biology , selection (genetic algorithm) , heritability , specific gravity , botany , zoology , agronomy , microbiology and biotechnology , evolutionary biology , mineralogy , chemistry , artificial intelligence , computer science
Three cycles of mass selection for seed size and specific gravity were evaluated for their effect on the protein and oil composition of F 6 ‐F 8 heterogeneous soybean populations from two crosses. An approximately linear change in seed size was observed with each selection cycle. Effective progress was obtained for protein content in cycle 1 of both crosses, but the effectiveness of subsequent cycles differed between crosses. Selection was effective for oil content in cycle 1, but progress in subsequent cycles differed between large and small seed populations of both crosses. Maximum progress for high protein and low oil was obtained by selecting for large seed and high specific gravity. Selection for small seed and low specific gravity resulted in maximum progress for high oil and low protein. Heritability was .93, .87, .77, and .73 for seed size, specific gravity, protein, and oil, respectively.