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A transcriptomic view of the ability of nascent hexaploid wheat to tolerate aneuploidy

文献类型： 外文期刊

作者： Zeng, Deying 1 ; Guan, Jiantao 3 ; Luo, Jiangtao 4 ; Zhao, Laibin 1 ; Li, Yazhou 1 ; Chen, Wenshuai 1 ; Zhang, Lianqua 1 ;

作者机构： 1.Sichuan Agr Univ Chengdu, State Key Lab Crop Gene Explorat & Utilizat South, Wenjiang 611130, Sichuan, Peoples R China

2.Sichuan Agr Univ Chengdu, Triticeae Res Inst, Wenjiang 611130, Sichuan, Peoples R China

3.Chinese Acad Agr Sci, Inst Crop Sci, Beijing 100081, Peoples R China

4.Sichuan Acad Agr Sci, Crop Res Inst, Chengdu 610066, Sichuan, Peoples R China

关键词： Homoeolog buffering; Aneuploidy; Polyploid; Synthetic wheat

期刊名称：BMC PLANT BIOLOGY （ 影响因子：4.215； 五年影响因子：4.96 ）

ISSN： 1471-2229

年卷期： 2020 年 20 卷 1 期

页码：

收录情况： SCI

摘要： Background In contrast to most animal species, polyploid plant species are quite tolerant of aneuploidy. Here, the global transcriptome of four aneuploid derivatives of a synthetic hexaploid wheat line was acquired, with the goal of characterizing the relationship between gene copy number and transcript abundance. Results For most of the genes mapped to the chromosome involved in aneuploidy, the abundance of transcripts reflected the gene copy number. Aneuploidy had a greater effect on the strength of transcription of genes mapped to the chromosome present in a noneuploid dose than on that of genes mapped elsewhere in the genome. Overall, changing the copy number of one member of a homeologous set had little effect on the abundance of transcripts generated from the set of homeologs as a whole, consistent with the tolerance of aneuploidy exhibited by allopolyploids, whether in the form of a chromosomal deficit (monosomy) or chromosomal excess (trisomy). Conclusions Our findings shed new light on the genetic regulation of homeoallele transcription and contribute to a deeper understanding of allopolyploid genome evolution, with implications for the breeding of polyploid crops.

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