ARS-USDA and Department of Agronomy, Purdue University, 47907, West Lafayette, IN, USA.
Theor Appl Genet. 1985 Nov;71(1):74-8. doi: 10.1007/BF00278257.
Linolenic acid content of the oil from F1, F2, and F3 seeds was compared with the parental values from a cross between a soybean cultivar with high (7.0%) and a mutant line with low (3.4%) linolenate (18∶3). Linolenic acid content of F1 seeds was intermediate to that of selfed seeds from the two parents and values from reciprocal crosses were essentially the same. This demonstrated that in this cross, linolenic acid content of the oil was controlled by the embryo rather than by the maternal parent. The distribution of linolenic acid in F2 seeds from F1 plants was trimodal and extended across the range of parental values. High and low linolenate F2 plants bred true for 18∶3 content and the F3 distribution of seeds from F2 plants with intermediate levels of 18∶3 was similar to the F2 distribution. The data were consistent with a model for two alleles with additive effects at a single locus controlling percent linolenic acid in these progenies. The simply-inherited alleles for low linolenate could be readily transferred to agronomically superior soybean cultivars, which would improve the fatty acid composition of the oil.
比较了 F1、F2 和 F3 代种子油中的亚油酸含量与高（7.0%）和低（3.4%）亚麻酸突变体杂交（18∶3）的亲本品系的亚油酸含量。F1 代种子的亚油酸含量介于双亲自交种子之间，正反交的数值基本相同。这表明在该杂交中，油中亚油酸含量受胚而不是母本的控制。F1 代植物的 F2 代种子中亚油酸的分布呈三峰分布，横跨双亲的范围。高和低亚麻酸 F2 代植物对 18∶3 含量表现为纯合，F2 代中具有中间水平 18∶3 的种子的 F3 分布与 F2 分布相似。这些数据与一个模型一致，该模型在单个基因座上用两个等位基因控制这些后代中亚麻酸的百分含量，具有加性效应。易于将低亚麻酸的简单遗传等位基因转移到农艺性状优良的大豆品种中，从而改善油的脂肪酸组成。
