杂交水稻亲本材料的产量主成分分析及品质鉴定

PCA analysis of yield-related traits and quality characteristics in 76 hybrid rice parents

为了了解当前长江上游地区杂交水稻亲本材料的产量综合表现以及对其稻米品质的评价,试验利用长江上游地区广泛应用的76份水稻亲本材料,调查了15个产量相关性状,同时对这些水稻的品质特性也进行了测定.结果表明,供试材料的单株产量与其中10个产量相关性状达到了显著或极显著水平;主成分分析表明在产量相关性状中共提取了4个主成分,分别为产量因子、粒型因子、结实率因子、结实率和粒型的联合因子.同时获得了各供试亲本材料在4个主成分中的得分及排名,筛选出了产量相关性状优良的亲本材料;供试亲本材料的RVA谱特征值间的相关性达到了显著或极显著水平,且与直链淀粉含量达到极显著水平.因此,通过本试验可为长江上游地区的杂交水稻亲本应用提供参考.

In order to reveal the rice yield and quality characteristics of 76 hybrid rice cultivars from upper Yangtze River, 15 yield-related traits, 3 physical/chemical quality indices and 6 RVA profiles were measured. The results showed that there were significant correlations between the yield per plant and others 10 yield-related traits.Four principal components were extracted by principal components analysis(PCA), including factors of yield,grain shape, seed setting rate and combinational factor of grain shape and seed setting rate. The parents of hybrid rice with good yield characters were selected. There were significant correlations among the eigenvalue of RVA profiles, and they were significantly correlated with amylose content(AC). Therefore, this test can provide a reference for the application studies of hybrid rice parents in the upper Yangtze River.