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Protein and Oil Percentage of Temperate Soybean Genotypes Evaluated in Tropical Environments 1
Author(s) -
Cianzio S. Rodriguez,
Cavins J. F.,
Fehr W. R.
Publication year - 1985
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/cropsci1985.0011183x002500040006x
Subject(s) - temperate climate , biology , tropics , sowing , gene–environment interaction , agronomy , genotype , selection (genetic algorithm) , microbiology and biotechnology , botany , ecology , gene , biochemistry , artificial intelligence , computer science
Breeding for seed protein and oil content of soybean [ Glycine max (L.) Merr.) genotypes adapted to temperate climates would require less time if selection could be practiced in tropical locations during the winter. The primary objective of the study was to determine the effectiveness of selection in tropical environments for seed composition of genotypes adapted to the northern United States. Twenty random F 4 ‐derived lines from each of two crosses were evaluated in six plantings at Isabela, PR, and in one planting at Ames, IA, during each of 2 years. Protein, oil, and protein + oil percentage were determined for individual plants and for plots harvested in bulk. The genotype ✕ planting interactions were not significant for any of the traits, except for oil percentage in one cross. Phenotypic and rank correlations for performance of the genotypes in Iowa and Puerto Rico ranged from 0.75 to 0.92 and were highly significant. for each of the three traits, ranking of entries among the Puerto Rico environments was similar to the ranking between the Iowa environments. The results indicated that plantings in tropical locations can be used effectively to select for protein, oil, and protein + oil percentage among soybean lines adapted to temperate environments.