白菜型油菜种子芥酸、油酸和硫苷含量的变异及相关性

为筛选及鉴定优异育种资源,为白菜型油菜育种提供基础材料,利用近红外方法测定84份白菜型油菜的芥酸、油酸和硫苷含量,并分析三者之间的相关性。结果表明:芥酸和油酸含量呈极显著负相关,芥酸和硫苷含量呈极显著正相关,油酸和硫苷含量呈极显著负相关;对群体材料进行主成分分析,并提取因子1和因子2进行作图,其中因子1和2分别能解释73.7%和23.2%的表型变异;经聚类分析,有79份材料聚集形成群Ⅰ,另外有5份特殊变异材料偏离群体。白菜型油菜群体的芥酸、油酸和硫苷含量的变异丰富且存在显著相关性,通过聚类分析筛选出5份(32号、45号、46号、50号、59号)优异的白菜型油菜育种材料。

Variation and Correlation of Erucic Acid,Oleic Acid and Glucosinolate Contents in Brassica rapa Seeds

To screen and identify fine breeding resources,and provide basic materials for B.rapa breeding,near infrared method was employed to determine the contents of erucic acid,oleic acid and glucosinolate,and then the correlation among them were analyzed.Results:Erucic acid content extremely significantly negatively correlated with oleic acid content,while extremely significantly positively correlated with glucosinolate content,and oleic acid content extremely significantly negatively correlated with glucosinolate content.PCA analysis showed that factor 1 and factor 2 could explain 73.7％ and 23.2％ phenotypic variation,respectively.79 B.rapa accessions clustered into group Ⅰ and the rest five B.rapa accessions (Number 32,45,32,45,46,50 and 59) were scattered.Conclusion:The contents of erucic acid,oleic acid and glucosinolate were of rich variation and significant correlation,five fine B.rapa breeding materials (Number 32,45,32,45,46,50 and 59) were screened through cluster analysis.