中国水稻科学

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水稻亚种间杂种不育性的遗传分析

申宗坦;徐云碧   

  1. 浙江农业大学,杭州310029
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1992-09-05 发布日期:1992-09-05

Genetic Analysis for the Hybrid Sterility of Intersubspecific Crosses in Rice

Shen Zongtan; Xu Yunbi   

  • Received:1900-01-01 Revised:1900-01-01 Online:1992-09-05 Published:1992-09-05

摘要: 利用4个亚种间亲和性品种(ICV)配制单交(F1和F2)及三交组合,研究了水稻籼粳杂种不育性(亚种间亲和性) 的遗传。结果表明: 籼稻IR58和二九丰之间、粳稻秀水117和T8340之间存在不育座位的分散(或不等位)分布。不同类型三交组合结实率的变异表明,亚种间亲和性基因具有重组和累加效应,无论F1结实率高低,其F2群体均存在较大的育性分离,含有3个ICV的三交组合F1亦如此,这种分离可能是由于亲本中不育座位分数分布及基因重组的结果。3对糯-非糯近等基因系与ICV 的三交组合分析表明,亚种间亲和性基因与糯质基因间不存在明显的连锁关系, 认为籼粳亚种间F1的不育性(亚种间亲和性)由多基因控制,基因的加性和上位性效应可分别用于解释两种类型的亲和性——一般(广谱)亲和性和特殊(狭谱)亲和性。

关键词: 遗传, 亲和性, 基因分散分布, 籼粳交, 不育性

Abstract: To examine the genetic mechanism of indica-japonica hybrid F1 sterility of rice, single crosses (F1 and F2) and three-varietal crosses (TVC) were made, using 4 intersubspeciflc compatible varieties (ICV) as parents. The results indicated that there were some dispersed (nonallelic) sterility loci between indica IR 58 and Erjiufeng and between japonica Xiushui 117 and T8340. The variation of fertility within each TVC of different types revealed the recombination and accumulation effects of IC genes. The great segregation of sterility was found in both F2 populations, from either high or low fertile F1s, and the TVCs from three ICVs, which could be attributed to the dispersive distribution and recombination of sterility loci of parents. By use of three pairs of waxy and isogenic nonwaxy lines to make TVCs with ICVs, a further research indicated that there was no evidence of linkage relationship between wide compatible genes and waxy gene. A polygenic system with more than one locus was considered to be responsible for the F1 sterility (compatibility). Two kinds of gene actions, additive and epistasis, could be respectively used to explain the two kinds of compatibilities, general (wide) and special (narrow) compatibilities.

Key words: Genetic analysis, Hybrid sterility, compatibility, Gene dispersed distribution, Indica-japonica crossing