甘蓝型油菜主要农艺性状的主成分分析

为了研究甘蓝型油菜各农艺性状之间的相互关系,提高油菜新品种的选育效率,对229份DH纯系材料进行农艺性状（包括株高、分枝高度、一次分枝数、主花序长度、主花序角果数、单株经济学产量和单株生物学产量等）的相关性和主成分分析。结果表明,株高、分枝高度、主花序长度、单株生物学产量和单株经济学产量等5个性状偏向于父本,而一次分枝数和主花序角果数偏向于母本。相关性分析显示,株高、分枝高度、主花序角果数、单株经济学产量和单株生物学产量之间均呈现极显著正相关,一次分枝数与株高和分枝高度之间呈负相关。主成分分析可将农艺性状综合为株高因子、一次分枝数因子、主花序角果数因子和分枝高度因子,累计贡献率达90.0%,基本涵盖了农艺性状的全部信息。

Principal Component Analysis of Main Agronomic Traits in Brassica napus Population

To study the relationship among agronomic traits of Brassica napus and improve the breeding efficiency of new varieties, the correlation analysis and principal component analysis of agronomic traits were carried out for 229 DH materials, those traits included plant height, height of branch, number of first effective branches, height of main inflorescence, number of main inflorescence pods, economic yield per plant and biological yield per plant. The results showed that: plant height, height of branch, height of main inflorescence, economic yield per plant and biological yield per plant were partial to male parent, but the number of first effective branches and the number of main inflorescence pods were partial to female parent. The correlation analysis indicated that plant height, height of branch, number of main inflorescence pods, economic yield per plant and biological yield per plant were significantly and positively correlated, and the number of first effective branches was negatively correlated with plant height and branch height. Through the principal component analysis, the rapeseed quality traits could be integrated into plant height, number of first effective branches, and number of main inflorescence pods and branch height, with the total cumulative contribution rate of 90.0%, which basically covered the full information of the agronomic traits of Brassica napus.