寒地野生大豆资源农艺性状的相关性和主成分分析

评价和筛选优异野生大豆农艺性状可为大豆育种提供种质资源。本研究对204份寒地野生大豆资源9个农艺性状进行主成分分析,结果表明:农艺性状变异系数的变幅为14.0%~71.4%,多样性指数的变幅为1.46~2.06;筛选出27份特异材料,有8份材料聚集了2个以上特异性状;单株粒重与其它的性状(无效荚数除外)之间均存在显著的相关性;百粒重和其它的性状(节间距除外)之间均存在显著或极显著的相关性;有效荚数和其它的性状(分枝数除外)之间均存在显著或极显著的相关性;单株粒数和其它的性状(分枝数和无效荚数除外)之间均存在着显著或极显著的相关性;主成分分析发现,前3个主成分累计贡献率大于73%,能有效地解释野生大豆农艺性状的总变异。

Correlation and principal component analysis for agronomic traits of wild soybean in cold region

In order to select promising traits among wild soybean germplasm as hybrid parents in soybean breeding,we conducted a principal component analysis for 9 agronomic traits in 204 genotypes of wild soybean.The results showed that variation coefficient ranged from 14.0%to 71.4%,and diversity index ranged from 1.46 to 2.06.Twenty-seven specific genotypes were screened out,and eight genotypes were with more than 2 specific traits.Significant correlations existed between seed weight per plant and other traits(except unproductive pods).Significant correlations existed between 100-seed weight and other traits(except internode length).Significant correlations existed between productive pods per plant and other traits(except branch number).Significant correlation existed between seeds per plant and other traits(except branch number and unproductive pods).Principal component analysis showed that the first three principal components were with more than 73%of cumulative contribution,effectively explaining the total variation of agronomic traits of wild soybean.