Improving bridge effect to overcome interspecific hybrid sterility by pyramiding hybrid sterile loci from Oryza glaberrima
文献类型： 外文期刊
作者： Li, Jing 1 ; Zhou, Jiawu 1 ; Xu, Peng 1 ; Yang, Ying 1 ; Deng, Xianneng 1 ; Deng, Wei 1 ; Zhang, Yu 1 ; Lv, Yonggang 1 ; Pu, Qiuhong 1 ; Tao, Dayun 1 ;
作者机构： 1.Food Crops Res Inst, Yunnan Acad Agr Sci YAAS, Yunnan Seed Lab, Yunnan Key Lab Rice Genet Improvement, Kunming 650200, Peoples R China
期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.6； 五年影响因子：4.9 ）
ISSN： 2045-2322
年卷期： 2023 年 13 卷 1 期
页码：
收录情况： SCI
摘要： In order to evaluate the genetic effect caused by hybrid sterile loci, NILs with O. glaberrima fragment at six hybrid sterile loci under O. sativa genetic background (single-locus-NILs) were developed; two lines harboring two hybrid sterile loci, one line harboring three hybrid sterile loci were further developed. A total of nine NILs were used to test cross with O. sativa recurrent parent, and O. glaberrima accessions respectively. The results showed that the sterility of pollen grains in F(1 )hybrids deepened with the increase of the number of hybrid sterile loci, when the nine lines test crossed with O. sativa recurrent parent. The F-1 hybrids were almost completely sterile when three hybrid sterile loci were heterozygeous. On the other hand, the single-locus-NILs had limited bridge effect on improving pollen grain fertility of interspecific hybrids. Compared single-locus-NILs, the multiple-loci-NILs showed increasing effect on pollen fertility when test crossing with O. glaberrima accessions. Further backcrossing can improve the fertility of pollen grain and spikelet of interspecific hybrids. The optimal solution to improve the fertility of interspecific hybrid can be utilization of pyramiding bridge parent plus backcrossing. This report has potential for understanding the nature of interspecific hybrid sterility, and overcoming the interspecific hybrid F1 pollen grain sterility between O. sativa and O. glaberrima.
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