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
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摘要: 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，Ｎ１２Ｓ与Ｎ１８Ｓ的不育基因完全等位，Ｗ７４１５Ｓ与５４６０Ｓ之间，安农Ｓ－１与Ｗ７４１５Ｓ、Ｎ１２Ｓ（Ｎ１８Ｓ）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。Ｗ６１５４Ｓ与所有其他６个不育系，衡农－１Ｓ与所有其他６个不育系，５４６０Ｓ与Ｗ７４１５Ｓ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，以及光温敏不育系的转育利用问题进行了探讨。Abstract: 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.
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