基于塑体数据和核单拷贝基因,阐明了Cucurbitaceae,特别是Trichosanthes的系谱
Dong-Liang Lin1, Ying-Ying Wen1, Zhao-Qi Wang1
1State Key Laboratory of Plant Diversity and Specialty Crops, Institute of Botany, Chinese Academy of Sciences, Haidian, Beijing, 100093, China.
BMC plant biology
|July 19, 2025
概括
这项研究使用塑体和核数据解决了Cucurbitaceae家族树,揭示了Trichosanthes是过敏的,需要重新分类. 这些发现为经济上重要的植物家族的演变和多样化提供了新的见解.
科学领域:
- 植物系统学和植物遗传学
- 进化生物学 进化生物学
- 分子植物学分子植物学
背景情况:
- 黄瓜科 (Cucurbitaceae) 是一个重要的植物家族,其遗传关系尚未解决.
- 作为最大的属,Trichosanthes的低级分类仍然存在争议.
- 以前的遗传学研究已经产生了相互矛盾的结果,需要进一步调查.
研究的目的:
- 重建 Cucurbitaceae 的族系,重点关注 Trichosanthes 属.
- 为了澄清Cucurbitaceae家族及其主要属内的进化关系.
- 为未来的分类学和进化研究提供一个强大的遗传学框架.
主要方法:
- 使用塑体和1,244个单拷贝核基因 (SCN) 数据集的植物遗传学重建.
- 分析了137个种类 (质体) 和143个样本 (SCN),代表所有15个部落和众多属.
- 分子年龄测定以估计分歧时间和多样化模式.
主要成果:
- 质原体和SCN数据集在很大程度上一致,将Cucurbitaceae的骨干分解为九个类.
- 确定了第一个分支部落 (Actionstemmateae,Fevilleeae,Gomphogyneae,Zanonieae) 及其关系.
- 考古学家认为,科植物起源于白纪晚期 (大约. 94.186 MYA) 通过世纪的多样化;Trichosanthes起源于约. 30.089 MYA. 这是一年多的时间.
结论:
- 研究人员发现,Trichosanthes是一种类的植物,其中嵌着三种属,因此需要对其分类进行修订.
- 这项研究为几个部落的遗传学位置提供了新的见解,包括Indofevilleeae,Thladiantheae和Momordiceae.
- 在中期米奥森和普略森时期,三生植物迅速多样化,这可能是由于气候的最佳状态所导致的.
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