Natural Variations in SLG7 Regulate Grain Shape in Rice
文献类型: 外文期刊
第一作者: Miao, Jun
作者: Miao, Jun;Peng, Xiurong;Leburu, Mamotshewa;Yuan, Fuhai;Gu, Houwen;Gao, Yun;Tao, Yajun;Gong, Zhiyun;Yi, Chuandeng;Gu, Minghong;Yang, Zefeng;Liang, Guohua;Gu, Haiyong;Zhu, Jinyan
作者机构:
关键词: rice;quantitative trait loci;grain shape;cell elongation
期刊名称:GENETICS ( 影响因子:4.562; 五年影响因子:4.845 )
ISSN:
年卷期:
页码:
收录情况: SCI
摘要: Rice (Oryza sativa) grain shape, which is controlled by quantitative trait loci (QTL), has a strong effect on yield production and quality. However, the molecular basis for grain development remains largely unknown. In this study, we identified a novel QTL, Slender grain on chromosome 7 (SLG7), that is responsible for grain shape, using backcross introgression lines derived from 9311 and Azucena. The SLG7 allele from Azucena produces longer and thinner grains, although it has no influence on grain weight and yield production. SLG7 encodes a protein homologous to LONGIFOLIA 1 and LONGIFOLIA 2, both of which increase organ length in Arabidopsis. SLG7 is constitutively expressed in various tissues in rice, and the SLG7 protein is located in plasma membrane. Morphological and cellular analyses suggested that SLG7 produces slender grains by longitudinally increasing cell length, while transversely decreasing cell width, which is independent from cell division. Our findings show that the functions of SLG7 family members are conserved across monocots and dicots and that the SLG7 allele could be applied in breeding to modify rice grain appearance.
分类号: R394
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