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用多个遗传标记重新评估澳大利亚的四角蜂无刺蜂的杂交

James P Hereward¹, Tobias J Smith¹, Ros Gloag²

¹School of the Environment The University of Queensland Brisbane Queensland Australia.

Ecology and evolution

|February 3, 2025

概括

对澳大利亚三种无刺蜂物种的基因分析没有发现最近杂交的证据. 先进的SNP标记器清楚地区分了物种,与早期的发现相矛盾,并强调了高分辨率遗传工具对于精确的物种划界的重要性.

科学领域:

动物学动物学
遗传学是一个遗传学.
进化生物学进化生物学

背景情况:

澳大利亚昆士兰州东南部的*Tetragonula*属的神秘无刺蜂种 (*T. carbonaria*, *T. davenporti*和 *T. hockingsi*) 之前已经报告过杂交.
之前使用微卫星标记物的研究表明,这些物种之间偶尔会发生杂交事件.

研究的目的:

重新检查三种神秘的 * Tetragonula * 无刺蜂物种的杂交报告.
通过使用先进的遗传标记物来确定这些密切相关物种之间的当代基因流量的程度.

主要方法:

分析1745个单核酸多态 (SNP) 用于物种歧视.
核基因 (*EF1alpha*, *Opsin*) 和线粒体16S rRNA基因的测序.
核和线粒体基因组分离的评估.

主要成果:

在SNP中,可靠地区分了三种*Tetragonula*物种,没有显示当代杂交的证据.
观察到较低的核分歧 (0.7%-1%),保留了*EF1alpha*序列,但在*Opsin*中存在特定物种的多态性.
与核基因组相比,线粒体基因组显示出明显更高的分歧 (21.6%-23.6%),没有线粒体核异常.
在这三种物种的大多数个体中发现了核基因 * EF1alpha * 的相同的amplicon序列.

结论:

昆士兰州东南部的*Tetragonula*物种之间没有持续的基因流动.
尽管有形态相似之处和较低的核分歧,但这些物种仍然在繁殖上孤立.
高分辨率的SNP标记器在估计当代杂交时提供了更高的准确性,这可能导致其他研究中报告率较低.

关键词:

梅里波尼尼尼 (Meliponini) 是一个岛屿.基因流是指基因的流动.遗传标记物是一种基因标记物.混合化,混合化,混合化.种类的物种种类的物种.没有刺的蜜蜂蜂.

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