Analysis of the apparent w_4 locus in soybean line P.I. 81.763

摘要

Flower color of soybean [Glycine max (L) Merr.] is influenced by the epistatic gene interaction of several loci, including W_1, W_3, W_4, W_m and W_p. Dominant alleles at the W_1 and W_4 loci indicate the presence of anthocyanin biosynthesis, producing purple pigmentation in flowers and hypocotyls (Groose et aj., 1988; Hartwig and Hinson, 1962). White flowers arise due to absence of anthocyanin caused by genotypes homozygous recessive at the W_1 locus. The intensity of pigmentation is modified by theW_3 locus (Groose and Palmer, 1991) so that the genotype W_1-, W_3-, W_4_ produces dilute-purple and the genotype W_1, W_1-, w_3w_3, w_4W_4 conditions near-white flower phenotypes (Groose et al., 1988). In addition, magenta flowers arise from the genotype W_1-, w_3w_3, W_4-, w_mw_m (Buzzell et al., 1977) and pink flowers are conditioned from the W_1-, w_3w_3, W_4-, w_pw_p genotype (Stephens and Nickell, 1992).