Genetical studies on genic male sterile mutant obtained through breeding of isogenic translocation line of Taichung 65 in rice, Oryza sativa L
Genetical studies on genic male sterile mutant obtained through breeding of isogenic translocation line of Taichung 65 in rice, Oryza sativa L
复制标题
水稻台中65同基因易位系育成雄性不育突变体的遗传研究
DOI：
10.1270/jsbbs1951.41.451
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发表时间：
1991
期刊：
影响因子：
2.4
通讯作者：
C. Shinjyo
中科院分区：
文献类型：
--
作者：
Shigetoshi Sato;C. Shinjyo
在台中65 B10F2群体中分离到花药缺乏花粉粒的雄性不育突变体，携带互换染色体1-3a。利用雄性不育植株进行遗传研究，探讨其遗传方式。将台中65及其具有标记基因或1-3a染色体互换的等基因系与突变体杂交。结果表明，雄性不育受单隐性基因控制，与雄性不育基因ms-9等位。该基因不依赖于断点1-3a，而在第6连锁群中与Ur（波状轴）和Cl（簇状小穗）两个标记基因连锁。三个基因的序列为Cl-ms-9-Ur。与台中65相比，雄不育植株的茎和上两个节间的长度显著缩短。虽然类似的雄性不育突变体出现在早期回交代B3F2中，但雄性不育性不太可能维持到B10F2。因此，台中65似乎容易发生基因突变。
Male sterile mutants lacking pollen grains in anthers segregated in the B10F2 population of Taichung 65 carrying interchange chromosome 1-3a. Genetical studies were carried out using the male sterile plants to examine the mode of inheritance. Taichung 65 and its isogenic lines having marker genes or interchange chromosome 1-3a were crossed with the mutant. The results showed that the male sterility is controlled by a single recessive gene, and is allelic to the genic male-sterile gene, ms-9. The gene was independent of the breakpoint 1-3a, while it was linked to two marker genes, Ur (Undulate rachis) and Cl (Clustered spikelet) in the sixth linkage group. The order of the three genes was estimated to be Cl-ms-9-Ur. The length of the culm and upper two internodes in the male sterile plants was significantly reduced, compared with that of Taichung 65. Although similar male sterile mutants occurred in an early backcross generation B3F2, it is unlikely that the male sterility was maintained until B10F2. Therefore, it appears that Taichung 65 is prone to undergo gene mutations.