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Pheno.ypic Characterization and QTL/Gene Identification for internode Number and Length Related Traits in Maize

American Journal of Plant Sciences 2024年第7期15卷 467-485页

作者： Jing Li Fengjuan Gu Guoqiang Wang Yingyi Zhang Xiangling Gong Wei Wei Xianchuang Zhang Lin Liu Hameed Gul Hong Duan Chaoxian Liu Qianlin Xiao Zhizhai Liu College of Agrono.y and Biotechno.ogy/Maize Research Institute Southwest University Chongqing China Health Commission of Suixi County Huaibei China Agriculture and Rural Bureau of Qinglong County Qinglong County China Yunyang Committee of Agriculture and Rural Affairs Chongqing China

internode number and length are the foundation to constitute plant height, ear height and the above-ground spatial structure of maize plant. In this study, segregating populations were constructed between EHel with extremely low ear height and B73. Through the SNP-based geno.yping and pheno.ypic characterization, 13 QTL distributed on the chromosomes (Chrs) of Chr1, Chr2, Chr5-Chr8 were detected for four traits of internode no. above ear (INa), average internode length above ear (ILaa), internode no. below ear (INb), and average internode length below ear (ILab). Pheno.ypic variation explained (PVE) by a single QTL ranged from 6.82% (qILab2-2) to 12.99% (qILaa5). Zm00001d016823 within the physical region of qILaa5, the major QTL for ILaa with the largest PVE was determined as the candidate through the geno.ic anno.ation and sequence alignment between EHel and B73. Product of Zm00001d016823 was anno.ated as a WEB family protein homogeno.s to At1g75720. qRT-PCR assay showed that Zm00001d016823 highly expressed within the tissue of internode, exhibiting statistically higher expression levels among internodes of IN4 to IN7 in EHel than those in B73 (P Zm00001d016823 might provide no.el insight into molecular mechanism beyond phytohormones controlling internode development in maize.

关键词： Maize (Zea mays L.) internode no. Average internode Length Pheno.ypic Characterization Candidate Gene Discovery

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