Natural variation in GS5 plays an important role in regulating grain size and yield in rice
Natural variation in GS5 plays an important role in regulating grain size and yield in rice
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GS5 的自然变异在调节水稻籽粒大小和产量方面发挥着重要作用
DOI：
10.1038/ng.977
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发表时间：
2011-12-01
期刊：
影响因子：
30.8
通讯作者：
Zhang, Qifa
中科院分区：
文献类型：
--
作者：
Li, Yibo;Fan, Chuchuan;Zhang, Qifa
提高作物产量是植物科学研究的重要目标之一。籽粒大小是谷物产量的主要决定因素，是驯化和人工育种的目标性状。结果表明，水稻数量性状基因座GS5通过调控粒宽、灌浆和粒重来控制粒的大小。GS5编码一种推测为丝氨酸羧基肽酶，并作为籽粒大小的正调节因子，因此GS5的高表达与籽粒大小相关。对来自广泛地理范围的51份水稻材料的启动子区域进行测序，鉴定出三种单倍型似乎与粒宽有关。结果表明，GS5的自然变异有助于水稻的粒度多样性，并可能有助于提高水稻和其他作物的产量。
Increasing crop yield is one of the most important goals of plant science research. Grain size is a major determinant of grain yield in cereals and is a target trait for both domestication and artificial breeding. We showed that the quantitative trait locus (QTL) GS5 in rice controls grain size by regulating grain width, filling and weight. GS5 encodes a putative serine carboxypeptidase and functions as a positive regulator of grain size, such that higher expression of GS5 is correlated with larger grain size. Sequencing of the promoter region in 51 rice accessions from a wide geographic range identified three haplotypes that seem to be associated with grain width. The results suggest that natural variation in GS5 contributes to grain size diversity in rice and may be useful in improving yield in rice and, potentially, other crops.