Abstract: Thermo-sensitive Genic Male Sterile Rice (TGMS) lines Annong S-1, Hengnong S-1 and W6154S were used to study their genetics and stability in fertility transformation. All the three TGMS lines had a stable fertility transformation; and the genes responsible for the fertility of the three TGMS lines might be non-allelic. The fertility of Annong S-1 and Hengnong S-1 was controlled by a couple of recessive genes, the genetic mode of the fertility of W6154S could not be defined according to the segregation ratio of F₂ and BF₁; W6154S did not have a stable (even) population in fertility, the percentage of stained pollens were different among plants, panicles and spikelets. The expression of genes responsible for fertility of W6154S and Annong S-1 was influenced by the genetic background; the sterile plants selected from the combinations of W6154S still showed fertility segregation.

Key words: Fertility transformation, Genetics, Stability, Thermo-sensitive Genic Male Sterile Rice

摘要： 以安农S-1、衡农S-1和W6154S为材料，研究了温敏核不育水稻的遗传与稳定性。三个不育系各世代的育性转换特性是稳定的，不受年份、地点的影响；三个不育系的育性基因可能是非等位的，安农S-1、衡农S-1的育性由一对隐性基因控制，W6154S的遗传模式尚难确定；W6154S的群体育性不太整齐，单株、单穗以及颖花之间的育性有所差异，安农S-l和W6154S的育性基因表达受遗传背景的影响，W6154S的后代不育株有育性分离。

关键词: 遗传, 稳定性, 温敏核不育, 水稻, 育性转换