春小麦重组自交系品质性状与产量、生理性状相关性分析

Correlation Analysis of Quality Traits,Yield and Physiological Traitsin Recombinant Self-Incompatible Lines of Spring Wheat

以‘宁春4号’与‘宁春27号’为亲本杂交构建重组自交系的128份家系为材料,测定该群体的产量、叶面积指数、碳同位素分辨率、面筋含量等20个性状,分析各性状间的相关性。结果表明,该群体有丰富的变异类型,各性状离散程度较大,存在较大程度的超亲遗传。相关性分析表明生理性状与品质性状间有较强相关性,冠层温度、碳同位素分辨率对品质与产量性状影响较大;产量性状与品质性状大都呈正相关。以差异极显著的20个性状进行主成分分析,选取特征向量累积贡献率达87%的性状,分别是沉降值、稳定时间、湿面筋含量、硬度指数、粗蛋白含量、不实小穗数、穗粒数、吸水率、株高、结实小穗数、冠层温度、千粒质量与碳同位素分辨率;基于各性状聚类共分为9个类群,第九类群材料高产优质且农艺水分利用效率较高,为今后育种工作提供重要材料。

In this study,we created a recombinant self-incompatible line by crossing 128 family lines of‘Ningchun 4’with‘Ningchun 27’.We analyzed 20 traits such as yield,leaf area index,carbon isotope resolution,and gluten content to examine their interrelationships.The results indicated substantial variation within the population,wide dispersion for each trait,and a significant degree of superparental inheritance.Correlation analysis indicated a robust correlation between physiological and quality traits,with canopy temperature,carbon isotope discrimination,and both quality and yield traits exerting significant influence;the yield traits exhibited positive correlations with quality traits.Principal component analysis of 20 traits,with eigenvectors contributing cumulatively to 87%,led to the selection of specific traits,including settling value,stabilization time,wet gluten content,hardness index,crude protein content,number of infertile spikelets,number of grains,water absorption rate,plant height,number of fruiting spikelets,canopy temperature,thousand kernel mass,and carbon isotope discrimination.These traits were subsequently categorized into nine clusters.The ninth cluster exhibited high yield and quality,along with superior agronomic water use efficiency,providing valuable resources for future breeding.