Journal ArticleDOI
A QTL for rice grain width and weight encodes a previously unknown RING-type E3 ubiquitin ligase
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TLDR
The cloning and characterization of GW2 is reported, a new QTL that controls rice grain width and weight and suggests that GW2 negatively regulates cell division by targeting its substrate(s) to proteasomes for regulated proteolysis.Abstract:
Grain weight is one of the most important components of grain yield and is controlled by quantitative trait loci (QTLs) derived from natural variations in crops. However, the molecular roles of QTLs in the regulation of grain weight have not been fully elucidated. Here, we report the cloning and characterization of GW2, a new QTL that controls rice grain width and weight. Our data show that GW2 encodes a previously unknown RING-type protein with E3 ubiquitin ligase activity, which is known to function in the degradation by the ubiquitin-proteasome pathway. Loss of GW2 function increased cell numbers, resulting in a larger (wider) spikelet hull, and it accelerated the grain milk filling rate, resulting in enhanced grain width, weight and yield. Our results suggest that GW2 negatively regulates cell division by targeting its substrate(s) to proteasomes for regulated proteolysis. The functional characterization of GW2 provides insight into the mechanism of seed development and is a potential tool for improving grain yield in crops.read more
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Plant nitrogen assimilation and use efficiency.
TL;DR: The limiting factors in plant metabolism for maximizing NUE are different at high and low N supplies, indicating great potential for improving the NUE of current cultivars, which were bred in well-fertilized soil.
Journal ArticleDOI
Natural variation in Ghd7 is an important regulator of heading date and yield potential in rice
Weiya Xue,Yongzhong Xing,Xiaoyu Weng,Yu Zhao,Weijiang Tang,Lei Wang,Hongju Zhou,Sibin Yu,Caiguo Xu,Xianghua Li,Qifa Zhang +10 more
TL;DR: It is shown that the quantitative trait locus (QTL) Ghd7, isolated from an elite rice hybrid and encoding a CCT domain protein, has major effects on an array of traits in rice, including number of grains per panicle, plant height and heading date.
Journal ArticleDOI
A map of rice genome variation reveals the origin of cultivated rice
Xuehui Huang,Nori Kurata,Xinghua Wei,Zi-Xuan Wang,Zi-Xuan Wang,Ahong Wang,Qiang Zhao,Yan Zhao,Kunyan Liu,Hengyun Lu,Wenjun Li,Yunli Guo,Yiqi Lu,Congcong Zhou,Danlin Fan,Qijun Weng,Chuanrang Zhu,Tao Huang,Lei Zhang,Yongchun Wang,Lei Feng,Hiroyasu Furuumi,Takahiko Kubo,Toshie Miyabayashi,Xiaoping Yuan,Qun Xu,Guojun Dong,Qilin Zhan,Canyang Li,Asao Fujiyama,Atsushi Toyoda,Tingting Lu,Qi Feng,Qian Qian,Jiayang Li,Bin Han,Bin Han +36 more
TL;DR: In-depth analyses of the domestication sweeps and genome-wide patterns reveal that Oryza sativa japonica rice was first domesticated from a specific population of O. rufipogon around the middle area of the Pearl River in southern China, and was subsequently developed from crosses between japonicas rice and local wild rice as the initial cultivars spread into South East and South Asia.
Journal ArticleDOI
Control of grain size, shape and quality by OsSPL16 in rice
Shaokui Wang,Kun Wu,Qingbo Yuan,Xueying Liu,Zhengbin Liu,Xiaoyan Lin,Ruizhen Zeng,Haitao Zhu,Guojun Dong,Qian Qian,Guiquan Zhang,Xiangdong Fu +11 more
TL;DR: It is shown that a quantitative trait locus GW8 is synonymous with OsSPL16, which encodes a protein that is a positive regulator of cell proliferation that promotes cell division and grain filling, with positive consequences for grain width and yield in rice.
Journal ArticleDOI
Genome-wide association study of flowering time and grain yield traits in a worldwide collection of rice germplasm.
Xuehui Huang,Yan Zhao,Yan Zhao,Xinghua Wei,Canyang Li,Ahong Wang,Qiang Zhao,Wenjun Li,Yunli Guo,Liuwei Deng,Chuanrang Zhu,Danlin Fan,Yiqi Lu,Qijun Weng,Kunyan Liu,Taoying Zhou,Yufeng Jing,Lizhen Si,Guojun Dong,Guojun Dong,Tao Huang,Tingting Lu,Qi Feng,Qian Qian,Jiayang Li,Bin Han,Bin Han +26 more
TL;DR: This study shows that the integrated approach of sequence-based GWAS and functional genome annotation has the potential to match complex traits to their causal polymorphisms in rice.
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Eric S. Lander,David Botstein +1 more
TL;DR: In this paper, a set of analytical methods that modify and extend the classical theory for mapping such quantitative trait loci (QTLs) are described, and explicit graphs are provided that allow experimental geneticists to estimate, in any particular case, the number of progeny required to map QTLs underlying a quantitative trait.
Journal ArticleDOI
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TL;DR: It is shown that a QTL that increases grain productivity in rice, Gn1a, is a gene for cytokinin oxidase/dehydrogenase (OsCKX2), an enzyme that degrades the phytohormone cytokinIn.