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Maturity and Pubescence Color Are Associated in Short‐Season Soybean
Author(s) -
Cober E. R.,
Voldeng H. D.,
Morrison M. J.
Publication year - 1997
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/cropsci1997.0011183x003700020019x
Subject(s) - biology , germplasm , locus (genetics) , maturity (psychological) , botany , horticulture , genetics , gene , psychology , developmental psychology
Soybean [ Glycine max (L.) Merr.] pubescence characteristics may affect maturity in short‐season germplasm. The objective of this study was to investigate the association of pubescence color and density with maturity in short‐season soybean germplasm. In Exp. 1, 106 F 2 ‐derived quadruplets differing in pubescence color and density were developed from crosses between a F 3:4 progeny row, with dense pubescence and segregating for pubescence color, and four grey‐ and four tawny‐pubescent lines with normal pubescence density. These 424 lines were evaluated for maturity for 4 yr at Ottawa, ON. Grey‐pubescent lines matured an average of 8.6 d later than tawny‐pubescent lines. Dense‐pubescent lines matured an average of 2.6 d later than lines with normal pubescence density. In Exp. 2, crosses were made between five grey‐ and five tawny‐pubescent parents and the maturity of 1397 homozygous grey‐ or tawny‐pubescent F 3 progeny rows was observed. Grey‐pubescent progeny rows matured an average of 8.6 d later than tawny‐pubescent progeny rows. One tawny‐pubescent parent produced progeny in which maturity was not associated with pubescence color. In short‐season ( e 1 e 1 ) soybean germplasm, tawny pubescence is associated with early maturity. Since the E 1 maturity locus is linked to the T pubescence color locus, there may be a third allele at the E 1 locus or alternatively there may be a second maturity locus linked to pubescence color.