在中国的Trigonotis的族系 - - 特别提及它的小坚果形态和塑基因组
Xue-Min Xu1, Dan-Hui Liu2, Shi-Xin Zhu1
1School of Life Sciences, Zhengzhou University, Zhengzhou, 450001, China.
Plant diversity
|August 21, 2023
概括
这项研究表明,主要在亚洲发现的Trigonotis属的小坚果形态学和叶绿体基因组可以用来划分物种. 基于这些特征的遗传学分析将Trigonotis分为两个不同的分类,澄清了进化关系.
科学领域:
- 植物学和植物分类学.
- 分子遗传学分子遗传学
- 植物形态学植物形态学
背景情况:
- *Trigonotis*属包括近60个物种,在中国有显著的度和特有性.
- 之前对*Trigonotis*的分类学和遗传学研究受到小样本大小和少数DNA标记物的限制,导致尚未解决的物种界限,特别是在坚果形态方面.
- 子形态是 * Trigonotis * 分类学的一个关键特征,但它的变化和与进化历史的关系需要进一步调查.
研究的目的:
- 综合分析39种*Trigonotis*种群的小坚果形态和完整的叶绿体基因组.
- 通过使用可靠的分子数据来解决Trigonotis*属内的遗传关系.
- 为了研究小坚果形态学与质细胞衍生后遗传学分类之间的相关性.
主要方法:
- 详细检查和分析39种*Trigonotis*种群中的小坚果形态.
- 测序和分析来自29种*Trigonotis*种群的34个完整的叶绿体基因组.
- 用完整的叶绿体基因组数据推断进化关系的植物遗传学重建.
主要成果:
- 在 *Trigonotis* 中,子形态被分为两个主要组:半球或斜面四面体与 carpopodiums,以及没有 carpopodiums 的倒置四面体.
- *Trigonotis*的叶绿体基因组表现出典型的四部分结构,具有保存的基因顺序和在非编码区域的高多样性,包括14个已识别的热点.
- 基于叶绿体基因组的遗传学分析强烈支持将Trigonotis分为两个不同的分类,直接与两个小坚果形态群相关.
结论:
- 这项研究确立了小坚果形态学与基于叶绿体的遗传学之间的明确联系,为*Trigonotis*分类提供了坚实的框架.
- 这些发现解决了以前的分类学争议,并更准确地了解了Trigonotis属的进化历史.
- 这项研究为未来的Boraginaceae家族的分类学,遗传学和进化研究提供了基础.
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