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| Progress on Dissecting Genetic Architecture and Formation Mechanism of Maize Ear Traits |
YIN Fang-bing1,2,WANG Cheng1,2,LONG Yan1,2,3,DONG Zhen-ying1,2,**( ),WAN Xiang-yuan1,2,3,**() |
1 Research Center of Biology and Agriculture, Shunde Graduate School, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
2 Zhongzhi International Institute of Agricultural Biosciences, Beijing 100192, China
3 Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding, Beijing International Science and Technology Cooperation Base of Bio-Tech Breeding, Beijing Solidwill Sci-Tech Co., Ltd., Beijing 100192, China |
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Abstract Ear is an important reproductive organ of maize. The development of ear determines the size of mature ear and the weight of single ear, and then directly affects the yield of maize. Ear traits include ear length, ear diameter, kernel row number, kernel number per row, ear weight, and kernel weight per ear, which are quantitative genetic traits controlled by multiple genes, and their genetic structures are different. It is effective to increase maize yield by analyzing the genetic basis of the traits of ear and optimizing the structure of ear. Through quantitative trait locus(QTL) mapping, genome-wide association study (GWAS) and other approaches, many loci related to ear traits have been identified, but at present, there are few ear-trait-related genes were cloned, and the consistent map of the identified genetic loci is not complete, so it is difficult to reveal the genetic structure of ear traits comprehensively. Based on the previous progress in genetic mapping of ear traits, the identified QTLs and significantly associated SNPs were integrated into the V4 version of maize B73 reference genome, and the genetic hotspots for ear traits were identified. The work is valuable for further analysis of the genetic structure of ear traits, cloning ear-trait-related genes and dissecting the molecular mechanism of ear development.
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Received: 31 October 2021
Published: 13 January 2022
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Corresponding Authors:
Zhen-ying DONG,Xiang-yuan WAN
E-mail: zydong@ustb.edu.cn;wanxiangyuan@ustb.edu.cn
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