Phylogenetic network of Linum species as revealed by non-coding chloroplast DNA sequences
Phylogenetic network of Linum species as revealed by non-coding chloroplast DNA sequences
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DOI：
10.1007/s10722-009-9502-7
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发表时间：
2010-06-01
影响因子：
2
通讯作者：
Allaby, Robin G.
中科院分区：
文献类型：
--
作者：
Fu, Yong-Bi;Allaby, Robin G.
作物野生近缘种是作物改良和适应不断变化的环境的新基因的宝贵来源。我们根据叶绿体 DNA 序列的四个非编码区，评估了代表 16 个物种的 29 个亚麻种质之间的系统发育关系，其中包括栽培亚麻及其祖先苍白亚麻。我们获得了一个 cpDNA 网络，显示这 16 个 Linum 物种根据之前定义的分类部分进行了适当的连接；这些联系反映了根据早期形态学和细胞学数据确定的相同进化途径。这些关系也支持了早期的假设，即栽培亚麻可能是对浅色亚麻植物的单一驯化的后代，显然是为了石油用途。详细的物种网络不仅对于理解亚麻物种的进化关系具有重要意义，而且对于对栽培亚麻的外来基因库进行分类也很有用，作为正在进行的亚麻改良新遗传多样性探索的一部分。
Crop wild relatives are invaluable sources of novel genes for crop improvement and adaptation to changing environments. We assessed phylogenetic relationships among 29 Linum accessions representing 16 species, including cultivated flax and its progenitor pale flax, based on four non-coding regions of chloroplast DNA sequences. We obtained a cpDNA network showing that these 16 Linum species are appropriately connected based on previously defined taxonomic sections; these connections reflect the same evolutionary pathways as determined from earlier morphological and cytological data. These relationships also support an earlier hypothesis that cultivated flax is probably descended from a single domestication of pale flax plants, apparently for oil usage. The detailed species network not only is significant for understanding evolutionary relationships of Linum species, but also useful for classifying exotic gene pools of cultivated flax as a part of the ongoing exploration of new genetic diversity for flax improvement.