Exploring genomic regions and genes modulating plant height and flag leaf morphology in rice
文献类型： 外文期刊
作者： Wang, Xianpeng 1 ; Chen, Lei 2 ; Zhao, Zhikun 1 ; Jiang, Ningjia 3 ; Khan, Najeeb Ullah 1 ; Hu, Qianfeng 1 ; Liu, Ruiqi 1 ; Liu, Zhenkun 3 ; Qian, Xuehan 1 ; Zhu, Xiaoyang 1 ; Sun, Xingming 1 ; Li, Jinjie 1 ; Zhang, Hongliang 1 ; Li, Danting 2 ; Xu, Peng 4 ; Pan, Yinghua 2 ; Li, Zichao 1 ; Zhang, Zhanying 1 ;
作者机构： 1.China Agr Univ, Coll Agron & Biotechnol, Frontiers Sci Ctr Mol Design Breeding, Key Lab Crop Heterosis & Utilizat MOE,Beijing Key, Beijing 100193, Peoples R China
2.Guangxi Acad Agr Sci, Rice Res Inst, Guangxi Key Lab Rice Genet & Breeding, Nanning, Guangxi, Peoples R China
3.China Agr Univ, Sanya Inst, Sanya, Peoples R China
4.Chinese Acad Sci, CAS Key Lab Trop Plant Resources & Sustainable Use, Xishuangbanna Trop Bot Garden, Menglun, Yunnan, Peoples R China
关键词：
plant height; flag leaf morphology; GWAS;
期刊名称：PLANT JOURNAL （ 影响因子：5.7； 五年影响因子：7.0 ）
ISSN： 0960-7412
年卷期： 2025 年 122 卷 1 期
页码：
收录情况： SCI
摘要： Plant height and flag leaf morphology critically affect plant yield because they determine above-ground plant biomass and photosynthate production. However, few genetic basis analyses and gene mining studies on plant height, flag leaf length, and flag leaf width have been performed, and there is little available information about the evolution and utilization of the underlying natural alleles. This study conducted a genome-wide association study (GWAS) using 689 rice accessions collected from diverse regions across the globe. The GWAS identified 73, 159, and 158 significant loci associated with plant height, flag leaf length, and flag leaf width, respectively. SD1HAP1 and NAL1A were also identified as superior alleles that could be used to improve plant architecture by reducing plant height and increasing flag leaf width, respectively. LEAF1 and its elite allele LEAF1G, which simultaneously modulated plant height and flag leaf morphology, were isolated, and the LEAF1 knockout lines showed reduced flag leaf length and plant height, whereas LEAF1G-complementary lines in the LEAF1A background had the opposite phenotypes. The results also showed that LEAF1G and SD1HAP1 evolved directly from wild rice and were mainly found in the Xian subgroup, whereas NAL1A might have originated from de novo mutation during domestication and was mainly found in the Geng subgroup. A joint haplotype analysis revealed that pyramiding SD1HAP1, NAL1A, and LEAF1G in Type I accessions optimized plant architecture, reduced plant height, and enlarged the flag leaves. In addition, genomic regions and genes that had been convergently selected for these traits were identified by combining a population genetics analysis with a GWAS. These findings provide valuable genetic targets for molecular breeding that will improve plant height and flag leaf morphology in rice.
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