Agriculture and Agri-Food Canada, 107 Science Place, Saskatoon, SK, S7N0X2, Canada.
Department of Plant Sciences, University of Saskatchewan, 51 Campus Drive, Saskatoon, SK, S7N5A8, Canada.
G3 (Bethesda). 2020 Apr 9;10(4):1297-1308. doi: 10.1534/g3.119.400957.
(L.) Crantz an oilseed crop of the Brassicaceae family is gaining attention due to its potential as a source of high value oil for food, feed or fuel. The hexaploid domesticated has limited genetic diversity, encouraging the exploration of related species for novel allelic variation for traits of interest. The current study utilized genotyping by sequencing to characterize 193 accessions belonging to seven different species collected primarily from the Ukrainian-Russian region and Eastern Europe. Population analyses among accessions with a 2n = 40 karyotype identified three subpopulations, two composed of domesticated and one of species. Winter type lines were identified as admixtures of and Eighteen genotypes of related unexpectedly shared only two subgenomes with , suggesting a novel or cryptic sub-species of with 19 haploid chromosomes. One accession (2n = 26) was found to comprise the first two subgenomes of suggesting a tetraploid structure. The defined chromosome series among germplasm, including the newly designated diploid née , suggested an evolutionary trajectory for the formation of the hexaploid genome and re-defined the underlying subgenome structure of the reference genome.
亚麻荠（L.）是十字花科的一种油料作物，由于其作为高附加值食用油、饲料或燃料的潜力而备受关注。已驯化的六倍体亚麻荠遗传多样性有限，这鼓励我们探索相关物种，以获取感兴趣性状的新型等位基因变异。本研究利用测序基因型分析对主要来自乌克兰-俄罗斯地区和东欧的 7 个不同物种的 193 个材料进行了分析。对具有 2n = 40 核型的材料进行群体分析，鉴定出三个亚群，其中两个由驯化的 组成，一个由 物种组成。冬季型 品系被鉴定为 和 的混合物。18 个相关 的基因型出人意料地仅与 共享两个亚基因组，这表明 存在一个新的或隐匿的亚种，具有 19 条单倍体染色体。一个 （2n = 26）品系包含了 的前两个亚基因组，这表明它具有四倍体结构。所定义的 种质材料的染色体系列，包括新指定的 二倍体 ，为 六倍体基因组的形成提供了一个进化轨迹，并重新定义了参考基因组的亚基因组结构。
