【摘要】 利用系统聚类法,对84份国内甘蓝型油菜种质资源的10个农艺性状进行聚类分析,研究其遗传亲缘关系,合理利用品种资源,结果表明:84份材料分为4个类群,其中,第Ⅱ类群有75个品种(系),又可分为2个亚群,第Ⅱ-1、2亚群可再分为3个和4个品种(系)组。4个类群的农艺性状有较大差异,第Ⅱ-2亚类群生育期较短,但单株产量最高。从中发现了长荚、大粒、早熟和角密等特异材料。更多还原

【Abstract】 In order to study the genetic relationship and use resourses rationally in breeding,systemic clustering analysis was conducted based on 10 agronomic traits of 84 germplasm resourses in Brassica napus.The results showed that 84 cultivars(lines) were devided into 4 classes.Class Ⅱ included 75 cultivars(lines) and was devided into 2 subclasses again.Subclass Ⅱ-1 and Ⅱ-2 were devided into 3 and 4 groups respectively.4 classes had quite different agronomic traits.Growth period of subclass Ⅱ-2 was 197.4 days only longer than class Ⅳ,but it′s yield per plant was highest.Specific materials such as long pod,big grain,early material and big density of pod were found in resoures.更多还原