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Haplotypes of qGL3 and their roles in grain size regulation with GS3 alleles in rice

文献类型： 外文期刊

作者： Zhang, Y. D. 1 ; Zhu, Z. 1 ; Zhao, Q. Y. 1 ; Chen, T. 1 ; Yao, S. 1 ; Zhou, L. H. 1 ; Zhao, L. 1 ; Zhao, C. F. 1 ; Wang, C. 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Food Crops, Nanjing, Jiangsu, Peoples R China

2.Yangzhou Univ, Jiangsu Coinnovat Ctr Modern Prod Technol Grain C, Yangzhou 225009, Jiangsu, Peoples R China

关键词： Rice;Haplotype;Grain size;qGL3;GS3

期刊名称：GENETICS AND MOLECULAR RESEARCH （ 影响因子：0.764； 五年影响因子：0.912 ）

ISSN： 1676-5680

年卷期： 2016 年 15 卷 1 期

页码：

收录情况： SCI

摘要： Grain size is an important trait that directly influences rice yield. The qGL3 and GS3 genes are two putative regulators that play a role in grain size determination. A single rare nucleotide substitution (C. A) at position 1092 in exon 10 of qGL3 might be responsible for variations in grain size. However, little is known about the haplotype variations of qGL3 and their interactions with GS3 during the regulation of grain length and grain weight. In this study, qGL3 haplotype variations were examined in 61 Indica varieties, and the effects of qGL3 and GS3 on grain trait variation in 110 lines were evaluated. Six qGL3 haplotypes were identified, and qGL32 was a major haplotype in Indica varieties. Moreover, qGL3-6, a reported key single nucleotide polymorphism, was validated. Our results showed that the mutants qgl3 and gs3 (loss-of-function mutation types of qGL3 and GS3, respectively) had significant effects on grain length and grain weight. However, no significant effects associated with differences in the regulation of grain thickness were observed. The genetic effects of qgl3 on grain phenotypes were stronger than those of gs3. In addition to increased grain length, qgl3 had an evident role in grain width increases. In contrast, gs3 played an opposite role in grain width regulation. These results provided novel insights into grain size control and the functions of qgl3 and gs3 in rice yield improvement.

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