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The role of S1-g allele from Oryza glaberrima in improving interspecific hybrid sterility between O. sativa and O. glaberrima

文献类型： 外文期刊

作者： Deng, Xianneng 1 ; Zhou, Jiawu 1 ; Xu, Peng 1 ; Li, Jing 1 ; Hu, Fengyi 1 ; Tao, Dayun 1 ;

作者机构： 1.YAAS, Food Crops Res Inst, Kunming 650205, Peoples R China

2.China Agr Univ, Beijing 100193, Peoples R China

关键词： near isogenic line;hybrid sterility;Oryza sativa;Oryza glaberrima

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： 2010 年 60 卷 4 期

页码：

收录情况： SCI

摘要： The HYBRID STERILITY I gene allele from Oryza glaberrima (SI-g) frequently causes sterility in F-1 hybrids with O. saliva allele S1-a. We tested the hypothesis that O. saliva lines homozygous for the O. glaberrima sterile gene alleles would be more compatible with O. glaberrima than similar lines with O. sativa alleles. The S1-g allele was introgressed from O. glaberrima into three O. saliva backgrounds using marker aided selection. These Si-g lines and one check line (Dianjingyou 1) were used as males in interspecific hybridization with numerous cultivars of O. glaberrima and as the recurrent parents in backcrosses. Both the pollen grain fertility and egg fertility of progenies of S1-g lines were higher than those without S1-g in F-1 and BC1F1 progenies. Spikelet fertility of BC2F1 progenies with S1-g gave similar results. The results indicated that O. saliva lines carrying S1-g allele from O. glaberrima can be used as bridge parents to significantly improve the fertility of hybrids between O. glaberrima and O. sativa.

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