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Maturity and Pubescence Color Are Associated in Short-Season Soybean

Plant Res. Ctr., Agric. & Agri-Food Canada, Ottawa, ON Canada, K1A 0C6

^* Corresponding author (coberer{at}em.agr.ca).

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 F₂-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 F₃ 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 (e₁e₁) soybean germplasm, tawny pubescence is associated with early maturity. Since the E₁ maturity locus is linked to the T pubescence color locus, there may be a third allele at the E₁ locus or alternatively there may be a second maturity locus linked to pubescence color.

Received for publication March 4, 1996.

This article has been cited by other articles:

				E. R. Cober and H. D. Voldeng A New Soybean Maturity and Photoperiod-Sensitivity Locus Linked to E1 and T Crop Sci., May 1, 2001; 41(3): 698 - 701. [Abstract] [Full Text] [PDF]