甘蓝型油菜种质资源遗传多样性和性状相关分析

Genetic Diversity and Correlation Analysis of Rapeseed Germplasm Resources

对95份来自不同国家和地区的甘蓝型油菜(Brassica napus L.)种质资源农艺性状和品质性状进行遗传多样性和相关性分析。结果表明,不同品种(系)间的性状差异显著;甘蓝型油菜的生物学特性多样性丰富,存在广泛变异,14个性状表现不同程度的差异,变异系数在6.66%～111.88%;对14个性状进行相关性分析,相关系数和偏相关系数均达极显著的有株高与有效分枝高度、主花序长度,全株角果数与有效分枝数、主花序角果数,有效分枝数与主花序长度,硫苷含量与芥酸含量,脂肪含量与蛋白质含量,脂肪含量与芥酸含量,相关系数分别为0.76、0.38、0.52、0.50、-0.30、0.80、-0.63、0.33,偏相关系数分别为0.90、0.73、0.46、0.47、-0.56、0.85、-0.57、0.58;主花序长度和有效分枝高度相关系数不显著,但偏相关系数极显著(-0.73)。

In order to utilize the rapeseed(Brassica napus L.)germplasm resources effectively and provide theoretical basis for the breeding new varieties,95 genetic resources from different countries were selected and analyzed by agronomic traits and quality traits for genetic diversity and correlation.Results showed that there were abound genetic diversity in these germplasm resources.The coefficient variations were from 6.66%to 111.88%.The correlation and the partial correlation analysis revealed that plant height was highly positive significant with the effective branching height and the length of main inflorescence.Effective pod number per plant was highly positive significant with first effective branch number and the pod number of main inflorescence.Effective branch number was highly negative significant with length of main inflorescence.It was highly positive significant between glucosinolate and erucic acid.Oil content was highly positive significant with erucic acid,but highly negative significant with protein.The correlation coefficients were 0.76、0.38、0.52、0.50、-0.30、0.80、-0.63、0.33,the partial correlation coefficients were 0.90、0.73、0.46、0.47、-0.56、0.85、-0.57、0.58.Length of main inflorescence and effective branching height are not significant correlation coefficient,but the partial correlation coefficient is highly negative significant.