Genomic Comparison and Population Diversity Analysis Provide Insights into the Domestication and Improvement of Flax
Genomic Comparison and Population Diversity Analysis Provide Insights into the Domestication and Improvement of Flax
复制标题
基因组比较和种群多样性分析为亚麻的驯化和改良提供了见解
DOI：
10.1016/j.isci.2020.100967
复制
发表时间：
2020-04-24
期刊：
影响因子：
5.8
通讯作者：
Liu, Touming
中科院分区：
文献类型：
--
作者：
Zhang, Jianping;Qi, Yanni;Liu, Touming
数千年来人们一直种植亚麻以获取其油和纤维。然而，目前尚不清楚亚麻种植过程中农艺性状的改变是如何在基因水平上发生的。在这项研究中，我们对油用亚麻、纤维用亚麻、地方品种和浅色亚麻的多个种质进行了全基因组变异分析，以鉴定亚麻栽培过程中的基因组变异。我们的研究结果表明，在亚麻驯化过程中，优先选择与开花、开裂、产油和植物结构相关的基因。此外，无论起源如何，现代油用亚麻的改进先于纤维用亚麻的改进，尽管在早期亚麻驯化过程中可能发生了油用和纤维使用特性的双重选择。我们还发现，MYB46/MYB83 基因的扩展可能有助于亚麻独特的次生细胞壁生物合成，并且 MYB46/MYB83 的定向选择可能塑造了当前油用和纤维用亚麻的形态特征。
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.