Combining Ability Analysis of Yield-Related Traits of Two Elite Rice Restorer Lines in Chinese Hybrid Rice
文献类型： 外文期刊
作者： Wang, Shiguang 1 ; Wu, Haoxiang 1 ; Lu, Zhanhua 1 ; Liu, Wei 1 ; Wang, Xiaofei 1 ; Fang, Zhiqiang 1 ; He, Xiuying 1 ;
作者机构： 1.Guangdong Acad Agr Sci, Rice Res Inst, Guangzhou 510640, Peoples R China
2.Minist Agr & Rural Affairs, Coconstruct Minist & Prov, Key Lab Genet & Breeding High Qual Rice Southern C, Guangzhou 510640, Peoples R China
3.Guangdong Key Lab New Technol Rice Breeding, Guangzhou 510640, Peoples R China
4.Guangdong Rice Engn Lab, Guangzhou 510640, Peoples R China
关键词： hybrid rice; Yuenongsimiao; restorer of fertility; GCA; SCA
期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.6； 五年影响因子：6.2 ）
ISSN： 1661-6596
年卷期： 2023 年 24 卷 15 期
页码：
收录情况： SCI
摘要： Hybrid rice breeding is an important strategy for enhancing grain yield. Breeding high-performance parental lines and identifying combining abilities is a top priority for hybrid breeding. Yuenongsimiao (YNSM) and its derivative variety Yuehesimiao (YHSM) are elite restorer lines with a high ability of fertility restoration, from which 67 derived hybrid combinations have been authorized to different degrees in more than 110 instances in China. In this study, we found that YNSM and YHSM contained three candidate restorer-of-fertility (Rf) genes, Rf3, Rf4, and Rf5/Rf1a, that might confer their restoration ability. Subsequently, we investigated heterosis and combining ability of YNSM and YHSM using 50 F-1 hybrids from a 5 x 10 incomplete diallelic mating design. Our results indicated that hybrid combinations exhibited significant genetic differences, and the additive effects of the parental genes played a preponderant role in the inheritance of observed traits. The metrics of plant height (PH), 1000-grain weight (TGW), panicle length (PL), and the number of spikelets per panicle (NSP) were mainly affected by genetic inheritance with higher heritability. Notably, the general combining ability (GCA) of YHSM exhibited the largest positive effect on the number of grains per panicle (NGP), NSP, PL, and TGW. Thus, YHSM had the largest GCA effect on yield per plant (YPP). In addition, the GCA of YNSM exhibited a positive impact on YPP, mainly due to the critical contribution of seed setting percentage (SSP). Moreover, YNSM and YHSM exhibited negative GCA effects on PH, implying that YNSM and YHSM could effectively enhance plant lodging resistance by reducing the plant height of the derived hybrids. Remarkably, among the hybrids, Yuanxiang A/YNSM (YXA/YNSM), Shen 08S/Yuemeizhan (S08S/YMZ), and Quan 9311A/YHSM (Q9311A/YHSM) represent promising new combinations with a higher specific combining ability (SCA) effect value on YPP with a value more than 3.50. Our research thus highlights the promising application for the rational utilization of YNSM and YHSM in hybrid rice breeding.
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