Genome-Wide Association Mapping Identifies Novel Panicle Morphology Loci and Candidate Genes in Sorghum
文献类型： 外文期刊
作者： Wang, Lihua 1 ; Upadhyaya, Hari D. 2 ; Zheng, Jian 1 ; Liu, Yanlong 1 ; Singh, Shailesh Kumar 2 ; Gowda, C. L. L. 2 ;
作者机构： 1.Anhui Sci & Technol Univ, Coll Agr, Chuzhou, Peoples R China
2.Int Crops Res Inst Semi Arid Trop, Gene Bank, Patancheruvu, India
3.ICAR Indian Agr Res Inst, Div Genet, New Delhi, India
4.Sichuan Acad Agr Sci SAAS, Inst Agr Resources & Environm, Chengdu, Peoples R China
5.Univ Louisiana Lafayette, Dept Biol, Lafayette, LA 70504 USA
关键词： sorghum; panicle morphology; association mapping; mini core; candidate genes
期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.754； 五年影响因子：6.612 ）
ISSN： 1664-462X
年卷期： 2021 年 12 卷
页码：
收录情况： SCI
摘要： Panicle morphology is an important trait in racial classification and can determine grain yield and other agronomic traits in sorghum. In this study, we performed association mapping of panicle length, panicle width, panicle compactness, and peduncle recurving in the sorghum mini core panel measured in multiple environments with 6,094,317 single nucleotide polymorphism (SNP) markers. We mapped one locus each on chromosomes 7 and 9 to recurving peduncles and eight loci for panicle length, panicle width, and panicle compactness. Because panicle length was positively correlated with panicle width, all loci for panicle length and width were colocalized. Among the eight loci, two each were on chromosomes 1, 2, and 6, and one each on chromosomes 8 and 10. The two loci on chromosome 2, i.e., Pm 2-1 and Pm 2-2, were detected in 7 and 5 out of 11 testing environments, respectively. Pm 2-2 colocalized with panicle compactness. Candidate genes were identified from both loci. The rice Erect Panicle2 (EP2) ortholog was among the candidate genes in Pm 2-2. EP2 regulates panicle erectness and panicle length in rice and encodes a novel plant-specific protein with unknown functions. The results of this study may facilitate the molecular identification of panicle morphology-related genes and the enhancement of yield and adaptation in sorghum.
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