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Gamete abortion locus detected by segregation distortion of isozyme locus Pgi1 in indica-japonica hybrids of rice (Oryza sativa L.)

文献类型： 外文期刊

作者： Lu, CG 1 ; Zou, JS 1 ; Ikehashi, H 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Nanjing 210014, Peoples R China

关键词： Oryza sativa L.;gamete abortion;gametophyte gene;pollen fertility;segregation distortion;wide cross

期刊名称：BREEDING SCIENCE （ 影响因子：2.086； 五年影响因子：2.632 ）

ISSN： 1344-7610

年卷期： 2000 年 50 卷 4 期

页码：

收录情况： SCI

摘要： In an attempt to stabilize the pollen fertility of indica-japonica hybrids of rice by the incorporation of segregation-distortion-neutral alleles, a locus causing distorted segregation of male gamete in indica-japonica hybrids was identified with an isozyme marker gene Pgi1 on chromosome 3. In seven F-2 populations of indica-japonica crosses and 25 F-3 lines from IR 36/Kamairazu, the japonica-type allele Pgi1-2 was transmitted via male gamete with a ratio of 0.29 to 0.38 instead of the normal one of 0.5 due to the presence of a gametophyte gene ga14. The recombination value between the locus ga14 and the marker gene Pgi1 was estimated to be 0.29 by using 57 F-3 lines of IR 36/Kamairazu. The male gamete transmission rate (k) of ga14-j was estimated to be 0.13 similar to0.22 against the ga18-i instead of the normal one of 0.5 based on the data from the F-2 and F-3 lines. The locus ga14 which reduced the frequency of male gametes harboring ga14-j in some indica-japonica hybrids was located in the order of Pgi1 similar to ga14-bc1 on chromosome 3.

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