在大西洋马德拉群岛本土的Sonchus (Asteraceae) 的质体:基因组结构,比较分析和家族遗传关系
Hye-Been Kim1,2, Dong-Geol Lee2, Seung-Chul Kim1
1Department of Biological Sciences, Sungkyunkwan University, Suwon, Republic of Korea.
PloS one
|June 22, 2023
概括
这项研究显示,马德拉 Sonchus 种类共享高度保存的塑体序列,支持来自加拿大群岛的单一,最近的起源. 需要进一步的研究来澄清更广泛的木质Sonchus联盟中的关系.
科学领域:
- 进化生物学是进化的生物学.
- 植物基因组学 植物基因组学
- 岛屿生物地理学岛屿生物地理学
背景情况:
- 木质的Sonchus联盟,包括6个属的31种,是马卡罗尼西亚群岛的特有物种.
- 四种Sonchus种类是马德拉特有的,表现出适应不同海拔的多样化生长形式.
- 之前的研究表明,在不到300万年前,马德拉从加那利群岛单独殖民,但塑体的进化仍然不清楚.
研究的目的:
- 为了研究马德拉 Sonchus 种群的塑体进化和遗传学关系.
- 确认单一植物并评估马德拉岛Sonchus的进化历史.
- 为了识别Sonchus塑体内的潜在突变热点.
主要方法:
- 来自四种马德拉 Sonchus 种群的塑体组合和表征.
- 遗传学分析以推断进化关系.
- 在相关的种类中对塑体序列进行比较分析.
主要成果:
- 在四种马德拉 Sonchus 种群中观察到高度保存的塑体序列,支持最近的单一起源.
- 在马德拉桑丘斯 (Madeiran Sonchus),其他马卡罗尼西亚桑丘斯 (Macaronesian Sonchus) 和太平洋丹德罗塞里斯 (Pacific Dendroseris) 物种之间也发现了保存的塑体.
- 确定了四个突变热点区域 (trnK-rps16,petN-psbM,ndhF-Ψycf1和ycf1) 和简单的序列重复模式.
结论:
- 这项研究提供了强有力的证据,证明了马德拉松的单一性.
- 这些发现支持马德拉最近从加拿大群岛的殖民事件.
- 马德拉桑丘斯 (Madeiran Sonchus) 在更广泛的木质桑丘斯 (Woody Sonchus) 联盟中的确切的遗传学位置需要进一步的研究.
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