摘要
采用主成分分析,把甘蓝型油菜49个杂交组合的12个主要农艺性状和品质性状归纳为5个主成分,即产油因子、角果因子、长度因子、种质因子、粒质因子,它们约占总遗传变异量的90%。根据各主成分遗传贡献率的大小,以主成分为单位选育高产、优质油菜品种,应首先注意选择全株角果总数和主序角果数较多的、产油量高的杂种,结合选择主序较长的后代材料,然后选择分枝数较多的双低优系。根据上述选择原则,已选出10个产油量高、综合性状较好的杂交组合。
Ten agronomic and 2 quality characters of 49 hybrids from a 7×7 diallel cross in Brassica napus were analyzed by using the method of principal component analysis. The results showed that all 12 characters of the hybrids could be divided into 5 principal components, i.e. yield and oil factor, silique factor, main raceme length factor, glucosinolate germplasm factor, and seed size and quality factor, these together accounting for nearly 90% of the total genetic variation. For the breeding of a new cultivar with high yield and good quality characters, these principles are to be followed in terms of the genetic contribution of the principal components: fristly, choose the hybrids with more total silique per plant and silique of main reaceme, and higher yield and oil content: next select the progenies with longer main raceme; and finally retain good quality lines with more branches. To date, 10 hybrids were selected which proved to be high in yield and oil content and appreciated better character combination.
出处
《华中农业大学学报》
CAS
CSCD
北大核心
1993年第5期427-432,共6页
Journal of Huazhong Agricultural University
关键词
农艺性状
品质性状
油菜
杂种
Brassica napus L., principal component analysis, agronomical character, qualitative character
