在Russula小区Xerampelinae中,有三种新物种得到了基因和表型一致性的支持
Chance R Noffsinger1, Katarína Adamčíková2, Ursula Eberhardt3
1Department of Ecology and Evolutionary Biology, University of Tennessee, 1416 Circle Drive, Knoxville, Tennessee 37996.
Mycologia
|February 16, 2024
概括
这项研究揭示了真菌子科Xerampelinae的新见解,确定了三种新物种,并澄清了现有的地理分布. 遗传学分析突出显示,在这个Russula群体中,有显著的区域特有性.
科学领域:
- 菌类学 菌类学是指菌类学.
- 菌类分类法 菌类分类法 菌类分类法
- 人类遗传学 是一个学科.
背景情况:
- 罗苏拉属内的真菌子系Xerampelinae的特点是独特的气味,棕色背景和绿色的硫酸铁反应.
- 在Xerampelinae中,传统的物种划分依赖于形态学和有限的分子数据,导致许多描述的种类.
- 以前的分类学工作描述了59个欧洲和19个北美种类,表明复杂物种多样性的潜力.
研究的目的:
- 提供欧洲和北美Xerampelinae成员的第一个多部位遗传学分析.
- 为了澄清物种界限,并评估Xerampelinae子部分内的多样性.
- 识别新物种并了解Xerampelinae.生物地理分布.
主要方法:
- 使用两个核核核糖体DNA (nrDNA) 位点和两个蛋白质编码基因进行多位子系遗传学分析.
- 对核rDNA内部转录间隔区域ITS1-5.8S-ITS2 (ITS条形码) 的分析,以获得更高的分辨率.
- 将遗传学发现与物种描述的形态学分析相结合.
主要成果:
- 多部位分类支持Xerampelinae中的17个物种级分类.
- 更具包容性的ITS条形码分析表明,物种丰富度更高,约有23个种类.
- 确定了三种新的物种,Russula lapponica,R. neopascua和R. olympiana,它们的分布受到限制.
- 确认R. subrubens (欧洲到北美) 和R. serissima (北美到欧洲) 的跨大西洋存在.
- 大多数Xerampelinae物种的分布受到限制,这表明了重要的区域特有性,包括R. xerampelina是欧亚的.
结论:
- 遗传学分析显示,Xerampelinae中存在复杂的物种多样性,超过了之前的估计.
- 该研究确定了三种新物种,并澄清了其他几种物种的分类学地位和分布.
- 显著的区域特有性是Xerampelinae的一个关键特征,影响了我们对真菌生物地理学的理解.
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