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Progress on Genetic Analysis and Molecular Dissection on Maize Plant Height and Ear Height |
MA Ya-jie1,2,GAO Yue-xin1,2,LI Yi-ping1,2,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 Plant height and ear height are important agronomic traits of maize, which directly affect the nutrient utilization efficiency and lodging resistance of the plant, and ultimately affect the yield of maize. Plant height and ear height are typical quantitative traits, and quantitative trait loci (QTL) mapping and genome-wide association study (GWAS) have been used to mine the related genetic loci. Some key genes regulating plant height and ear height were cloned by fine-mapping or by using mutants. However, due to the differences in type and size of mapping populations, type and density of the markers and statistical methods used by different research groups, the identified QTL was divergent significantly, and it was difficult to reveal the genetic structure of plant height and ear height of maize by single study. The identified QTLs were mainly based on genetic maps at early stages, and the versions of maize reference genome were updated several times, which hampered the efficient utilization of previously identified QTLs. Here, the mapping information of plant height and ear height was normalized and integrated into the V4 version of the maize inbred line B73 reference genome, and a consistent physical map for plant height and ear height was constructed. Furthermore, the mapping hotspots of plant height and ear height were identified by combining the results from independent studies. The cloned genes regulating both traits were also summarized. This study is of great significance for the in-depth dissection of the genetic structure of plant height and ear height, as well as for aiding gene cloning and marker-assisted selection in molecular breeding.
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Received: 01 November 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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Sawers R J H, Linley P J, Gutierrez-Marcos J F, et al. The Elm1 (ZmHy2) gene of maize encodes a phytochromobilin synthase. Plant Physiology, 2004, 136(1): 2771-2781.
doi: 10.1104/pp.104.046417
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