籼型光温敏核不育基因的等位性研究

The Allelism of Photo Thermo Sensitive Genic Male Sterile Genes of Indica Rice

将 4种不同种质的 7个籼型光温敏核不育水稻在可育期内相互杂交 ,将其杂交组合的F1、F2 代在广州长日高温条件下种植 ,观察其育性表现 ,并进行等位性测验 结果表明 ,N1 2S与N1 8S的不育基因完全等位 ,W741 5S与5 46 0S之间 ,安农S - 1与W741 5S、N1 2S(N1 8S)之间光温敏不育基因部分等位 ,即它们两两之间存在 1对位点相同的不育基因 W6 1 5 4S与所有其他 6个不育系 ,衡农 - 1S与所有其他 6个不育系 ,5 46 0S与W741 5S之外的其他 5个不育系 ,不育基因均完全不等位 文章还对不育基因等位性划分标准 。

Fertility of F 1 and F 2 generation of the crosses among seven indica photo thermo sensitive genic male sterile (PTGMs) lines of four different sources was analyzed in the season of high temperature with long daylight in Guangzhou from 1993 to 1995.Results indicated that sterile lines N12S and N18S possessed two pairs of recessive alleles for male sterility . W7415S and 5460S,AnnongS 1, W7415S and N12S(N18S) were partially allelic ,meaning that they possessed one pair of allelomorphs. But the sterile genes of W6154S,Hengnong 1S were nonallelic to that of the other six of PTGMs ,5460S was nonallelic to the other five PTGMs except W7415S. Meanwhile, the differentiation from partial allelism to complete allelism, and the utilization of the photo thermo sensitive genic male sterile germplasm in hybrid rice breeding were also discussed in this paper.