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以从三交组合 1 0 -A/ 88-1 64 3 / /川育 1 2号后代中选育的 67个重组系及其亲本和品种绵阳 2 6号为供试材料 ,考察了最高小穗数、平均小穗数、平均单穗粒数、千粒重和平均单穗粒重等 5个产量性状 ,进行了主成分分析和遗传聚类分析。供试材料中 ,1 0 -A是导入黑麦异源基因创制的小麦新品系。结果表明 ,重组系各产量性状的变异程度和范围均较大 ,有大粒型、多粒型、穗重型和多小穗类型等优良品系。对产量贡献由大到小的主成分依次是重穗因子、大粒因子、粒数因子和小穗数因子。遗传聚类分析将这 67个重组系分为四类 ,即 1 0 -A型、88-1 64 3和川育 1 2号型以及两种重组类型。文中对这些重组系的利用途径和价值进行了讨论
Sixty-seven recombinant strains, their parents and their parents, Mianyang No.26, selected from offspring of 10-A / 88-1643 / Five spikelets per panicle, average spikelet number, average grain number per spike, 1000-grain weight and average grain weight per spike. Principal component analysis and genetic clustering analysis were carried out. Among the tested materials, 10-A was a new wheat line introduced with rye heterologous genes. The results showed that the variation degree and range of the yield traits in the recombined lines were all large, with the fine lines of large grain type, multiple grain type, spike weight type and multiple spikelet types. The principal components that contribute to the yield from largest to smallest are heavy spike factor, grain factor, grain factor and spikelet factor. Genetic clustering analysis divided the 67 recombinant lines into four groups, namely, 10-A type, 88-1643 and Chuan-Yu-12 and two recombinant types. The paper discusses the ways and values of these reorganizations