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MeMYB26, a drought-responsive transcription factor in cassava (Manihot esculenta Crantz)

文献类型： 外文期刊

作者： Wang, Bin 1 ; Guo, Xin 2 ; Zhao, Pingjuan 2 ; Liao, Wenbin 2 ; Zeng, Changying 3 ; Li, Kai 1 ; Zhou, Yuxun 1 ; Xiao, Junh 1 ;

作者机构： 1.Donghua Univ, Coll Chem Chem Engn & Biotechnol, Shanghai 201620, Peoples R China

2.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Haikou 571199, Hainan, Peoples R China

3.Hainan Univ, Coll Trop Crops, Haikou 570228, Hainan, Peoples R China

4.Shanghai Biowing Appl Biotechnol Co Ltd, Shanghai 201620, Peoples R China

关键词： MYB; drought resistance; natural variation; candidate association study; coexpression interaction network

期刊名称：CROP BREEDING AND APPLIED BIOTECHNOLOGY （ 影响因子：1.282； 五年影响因子：1.493 ）

ISSN： 1984-7033

年卷期： 2021 年 21 卷 1 期

页码：

收录情况： SCI

摘要： Cassava (Manihot esculenta Crantz) is worldwide the sixth-largest food crop and highly drought resistant. The expression of the myeloblastosis (MYB) family protein MeMYB26 in cassava was previously reported to be significantly up-regulated under water deficit. To study the basic characterization, natural variations and potential functions of MeMYB26 for drought resistance in cassava, the protein was subjected to bioinformatics analysis, multiplex-PCR with next-generation sequencing and candidate association studies. The results indicated that MeMYB26 is a typical transcription factor, with two MYB DNA-binding and transcriptional activation domains. One stop-gained and five nonsynonymous variations in the genomic region of MeMYB26 were significantly associated with drought resistance traits. The results of the scale-free coexpression network showed that the MeMYB26 gene plays a critical role in plant stress resistance, growth and biomass development. It was concluded that MeMYB26 is a reliable candidate gene associated with drought tolerance and biomass storage in cassava.

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