期刊
GENETICS
卷 201, 期 4, 页码 1591-+出版社
GENETICS SOCIETY AMERICA
DOI: 10.1534/genetics.115.181115
关键词
rice; quantitative trait loci; grain shape; cell elongation
资金
- Key Program of Basic Research of China [2013CBA01405]
- National Natural Science Foundation of China [31471458, 31271679]
- Key Science and Technology Support Program of Jiangsu Province [BE2015341]
- Natural Science Foundation of Jiangsu Province [BK20150010, BK20130725]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据