遗传距离在籼稻杂交亲本选配中的应用研究  

Studies on the Application of Genetic Distance in Parent Selection for Hybridization in Indica Rice Varieties

作　　者：张良韬 刘德金[2] 

机构地区：[1]福建省农业科学院稻麦研究所,福州350019 [2]福建农学院,福州350002

出　　处：《福建省农科院学报》1993年第3期8-14,共7页

摘　　要：本试验采用近年来我省推广品种(优良品系)和淘汰组合的亲本作试验材料,应用多元分析方法对亲本进行遗传距离研究。结果表明:1.遗传距离较大程度地反映了亲本间遗传差异。聚类分析发现,凡推广品种(优良品系)的双亲均分布在不同类群;淘汰组合的双亲半数以上在同一类群。类间杂交是育成品种的重要条件。2.推广品种(优良品系)双亲的遗传距离值大多数分布在(?)+S至(?)+3S范围,而淘汰组合双亲遗传距离值小于(?)。3.遗传距离与亲本的熟期类型具有密切的关系。熟期差异大的亲本间遗传距离都较大,聚类结果均分布在不同类群;熟期相同或相近的亲本易归入同一类。Twenty-two parents of some popularized and eliminated varieties of Fujian province in recent years were chosen as materials. The multivariate analysis was applied to measure genetic distance among parents. The results showed that: 1. The genetic distance reflect in large degree the genetic divergence among parents. Cluster analysis showed that the female and male parents of popularized varieties were classified into different clusters. Those parents of eliminated crosses were mostly classified into the same cluster. So the selection of parents from different clusters is a prerequisite of successful hybridization. 2. The analysis revealed that appropriate values of genetic distance among parents of the popularized varieties mostly ranged from D2+S to D2 + 3S and those of eliminated crosses were smaller than D2. 3. The genetic distance was clasely related to the maturity of analysed parents. Those parents with larger differences in maturity also differed greatly in genetic distance. The parents with same or similar maturities were easily to be grouped into the same cluster.

关 键 词：籼稻 亲本 遗传距离 选择 

分 类 号：S511.210.3[农业科学—作物学]