22份陇南冬小麦新品系品质性状的相关性分析和聚类分析OA

To clarify the quality characteristics of newly developed wheat lines in the Longnan region,this study measured and systematically analyzed eight core quality traits,including grain bulk density,crude protein content,and wet gluten content,in 22 advanced-generation sta-ble winter wheat lines.The results indicated substantial variation in quality traits among the lines,with the extensograph area showing the high-est coefficient of variation(24.88%).According to national wheat quality standards,72.73%and 45.45%of the lines met the criteria for strong-gluten wheat with respect to bulk density and wet gluten content,respectively.Correlation analysis revealed extremely significant positive correlations among bulk density,crude protein content,wet gluten content,and dough extensibility traits.Hierarchical cluster analysis grouped the 22 lines into six clusters at a Euclidean distance of 7.Each cluster exhibited distinct quality profiles,with Cluster III(W20,W22)dem-onstrating superior overall performance and strong potential for use in strong-gluten wheat breeding.This study comprehensively evaluated the quality trait architecture of newly developed winter wheat lines in Longnan,providing a scientific basis for subsequent cultivar improvement and parental selection.