咨询与建议

看过本文的还看了

相关文献

该作者的其他文献

文献详情 >A Major QTL, Ghd8, Plays Pleio... 收藏

A Major QTL, Ghd8, Plays Pleiotropic Roles in Regulating Grain Productivity, Plant Height, and Heading Date in Rice

A Major QTL, Ghd8, Plays Pleiotropic Roles in Regulating Grain Productivity, Plant Height, and Heading Date in Rice

作     者:Wen-Hao Yan Peng Wang Hua-Xia Chen Hong-Ju Zhou Qiu-Ping Li Chong-Rong Wang Ze-Hong Ding Yu-Shan Zhang Si-Bin Yu Yong-Zhong Xing Qi-Fa Zhang 

作者机构:National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan) Huazhong Agricultural University Wuhan430070 China 

出 版 物:《Molecular Plant》 (分子植物(英文版))

年 卷 期:2011年第4卷第2期

页      面:319-330页

核心收录:

学科分类:120301[管理学-农业经济管理] 12[管理学] 1203[管理学-农林经济管理] 09[农学] 0901[农学-作物学] 

基  金:National Key Program on Basic Research Projects National Special Program for Research of Transgenic Plant of China, (2008ZX08009–001) National Natural Science Foundation of China, NSFC, (30830064, 30921091) Program for New Century Excellent Talents in University, NCET Huazhong Agricultural University, HZAU, (2009YB006) 

主  题:Near isogenic lines CCAAT-box binding protein ectopic expression flowering pathway yield formation 

摘      要:Rice yield and heading date are two distinct traits controlled by quantitative trait loci (QTLs). The dissection of molecular mechanisms underlying rice yield traits is important for developing high-yielding rice varieties. Here, we report the cloning and characterization of Ghd8, a major QTL with pleiotropic effects on grain yield, heading date, and plant height. Two sets of near isogenic line populations were developed for the cloning of GhdS. Ghd8 was narrowed down to a 20-kb region containing two putative genes, of which one encodes the OsHAP3 subunit of a CCAAT-box binding protein (HAP complex); this gene was regarded as the Ghd8 candidate. A complementary test confirmed the identity and pleiotropic effects of the gene; interestingly, the genetic effect of Ghd8 was dependent on its genetic background. By regulating Ehdl, RFT1, and Hd3a, Ghd8 delayed flowering under long-day conditions, but promoted flowering under short-day conditions. Ghd8 up-regulated MOC1, a key gene controlling tillering and branching; this increased the number of tillers, primary and secondary branches, thus producing 50% more grains per plant. The ectopic expression of Ghd8 in Arabidopsis caused early flowering by 10 d-a situation similar to the one observed by its homolog AtHAP3b, when compared to wild-type under long-day conditions; these findings indicate the conserved function of Ghd8 and AtHAP3b in flowering in Arabidopsis. Our results demonstrated the important roles of Ghd8 in rice yield formation and flowering, as well as its opposite functions in flowering between rice and Arabidopsis under long-day conditions.

读者评论 与其他读者分享你的观点

用户名:未登录
我的评分