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Genome-wide Analysis of MYB Gene Family in Potato Provides Insights into Tissue-specific Regulation of Anthocyanin Biosynthesis

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Horticultural Plant Journal 2021年第2期7卷 129-141页

作者： Yumei Li Jun Liang Xiangzhi Zeng Han Guo Youwei Luo Philip Kear Shouming Zhang Guangtao Zhu Faculty of Information Engineering and Automation Kunming University of Science and TechnologyKunming650500China Yunnan Key Lab for Potato Biology The CAAS-YNNU Joint Academy of Potato SciencesYunnan Normal UniversityKunming650500China Agricultural Genomics Institute at Shenzhen Chinese Academy of Agricultural SciencesShenzhenGuangdong518124China Yunnan Dehong Dai and Jinpo Nationality Institute of Agricultural Sciences DehongYunnan678400China International Potato Center(CIP) CIP China Center for Asia PacificBeijing100081China

The MYB transcription factor is one of the largest gene families in plants,playing an important role in regulating plant growth,development,response to stress,senescence,and especially the anthocyanin *** this study,A total of 217 MYB genes,including 901R-MYBs,124 R2R3-MYBs,and 3 R1R2R3-MYBs have been identified from the potato *** 1R-MYB and R2R3-MYB family members could be divided into 20 and 35 subgroups *** of gene structure and protein motifs revealed that members within the same subgroup presented similar exon/intron and motif organization,further supporting the results of phylogenetic *** is an ideal plant to reveal the tissue-specific anthocyanins biosynthesis regulated by MYB,as the anthocyanins could be accumulated in different tissues,showing colorful *** pairs of colored and colorless tissues,stigma,petal,stem,leaf,and tuber flesh,were applied to the transcriptomic analysis.A total of 70 MYB genes were found to be differentially expressed between colored and colorless tissues,and these differentially expressed genes were suspected to regulate the biosynthesis of anthocyanin of different ***-expression analysis identified numerous potential interactive regulators of anthocyanins biosynthesis,involving 39 MYBs,24 bHLHs,2 WD-repeats,and 29 biosynthesis ***-wide association study(GWAS)of tuber flesh color revealed amajor signal at the end of Chromosome 10,which was co-localized with reported I gene(StMYB88),controlling tuber peel *** of DEGs(differentially Expression Genes)revealed that both StMYB88 and StMYB89 were closely related to regulating anthocyanin biosynthesis of tuber *** work offers a comprehensive overview of the MYB family in potato and will lay a foundation for the functional validation of these genes in the tissue-specific regulation of anthocyanin biosynthesis.

关键词： potato MYB transcription factor anthocyanin differentially expressed co-expression tuber flesh

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