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Genomic Comparison and Population Diversity Analysis Provide Insights into the Domestication and Improvement of Flax

文献类型： 外文期刊

作者： Zhang, Jianping 1 ; Qi, Yanni 1 ; Wang, Limin 1 ; Wang, Lili 4 ; Yan, Xingchu 5 ; Dang, Zhao 1 ; Li, Wenjuan 1 ; Zhao, We 1 ;

作者机构： 1.Gansu Acad Agr Sci, Inst Crop Res, Lanzhou, Gansu, Peoples R China

2.Chinese Acad Agr Sci, Inst Bast Fiber Crops, Changsha, Hunan, Peoples R China

3.Chinese Acad Agr Sci, Ctr Southern Econ Crops, Changsha, Hunan, Peoples R China

4.Biomarker Technol Corp, Beijing, Peoples R China

5.Chinese Acad Agr Sci, Oil Crops Res Inst, Wuhan, Hubei, Peoples R China

6.Chinese Acad Agr Sci, Inst Biotechnol, Beijing, Peoples R China

期刊名称：ISCIENCE （ 影响因子：5.458； 五年影响因子：5.458 ）

ISSN：

年卷期： 2020 年 23 卷 4 期

页码：

收录情况： SCI

摘要： Flax has been cultivated for its oil and fiber for thousands of years. However, it remains unclear how the modifications of agronomic traits occurred on the genetic level during flax cultivation. In this study, we conducted genome-wide variation analyses on multiple accessions of oil-use, fiber-use, landraces, and pale flax to identify the genomic variations during flax cultivation. Our findings indicate that, during flax domestication, genes relevant to flowering, dehiscence, oil production, and plant architecture were preferentially selected. Furthermore, regardless of origins, the improvement of the modern oil-use flax preceded that of the fiber-use flax, although the dual selection on oil-use and fiber-use characteristics might have occurred in the early flax domestication. We also found that the expansion of MYB46/MYB83 genes may have contributed to the unique secondary cell wall biosynthesis in flax and the directional selections on MYB46/MYB83 may have shaped the morphological profile of the current oil-use and fiber-use flax.

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