南非大鼠(猪三胞菌)的系统地理学评估:初步见解

IF 2.4 2区 生物学 Q1 ZOOLOGY
W. Coetzer
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引用次数: 0

摘要

大藤鼠(Thryonomys swinderianus)是一种非洲啮齿动物,在撒哈拉以南地区分布广泛。在许多非洲国家,该物种被视为重要的蛋白质来源。这些啮齿动物也经常被视为一种有害物种,它们经常袭击农业环境中的农田。迄今为止,还没有关于南部非洲斯温氏弓形虫的系统发育研究发表。因此,本文首次报道了该物种在南非分布范围内的系统发育评估。30个样本来自当地博物馆的收藏,其中一个是由一名公众直接提交的,他在南非东开普省已知分布范围以西发现了一具被鉴定为swinderianus的啮齿动物尸体。先前在西非研究该物种时使用的两个线粒体位点被用于本次研究,以评估整个南非分布的猪螺旋体种群遗传多样性和系统发育结构。还与西非的序列数据进行了比较。为了进一步研究南非亚种群的进化历史,我们进行了散度时间估计。与西非数据集相比,在南非亚种群中观察到类似的遗传多样性估计值。来自南非东部地区的标本显示出更高的遗传多样性,可能表明最初的殖民地点来自非洲东部。根据贝叶斯推断,两个不同的系统发育分支被确定,形成了不同的西非和南非群体。分化估计表明,与之前报道的相似,猪尾螺最近的共同祖先(MRCA)年龄相近。MRCA对南非群体的估计确定了一个可能的更新世中期到晚期的迁徙事件,从东非到南部非洲。然而,需要在整个非洲分布范围内进一步进行精细采样,以便根据需要为未来不同亚种群的保护管理规划提供更准确的评估。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A phylogeographic assessment of South African greater cane rats (Thryonomys swinderianus): Preliminary insights
The greater cane rat (Thryonomys swinderianus) is an African rodent with a wide Sub-Saharan distribution range. This species is viewed as an important protein source in many African countries. These rodents are also regularly viewed as a pest species who frequently raid croplands in agricultural settings. No phylogenetic work has to date been published on T. swinderianus from southern Africa. This paper therefore reports the first phylogenetic assessment on the species across the South African distribution range. Thirty samples were sourced from local museum collections, with one direct submission by a member of the public who found a rodent carcass identified as T. swinderianus west of its known distribution range in the Eastern Cape Province of South Africa. Two mitochondrial loci previously used in West African studies of this species were used in the current study to asses T. swinderianus population genetic diversity and phylogenetic structure across the South African distribution. A comparison to sequence data from West Africa was also performed. A divergence time estimation was conducted to further investigate the evolutionary history of the South African sub-population. Similar genetic diversity estimates were observed for the South African sub-population when compared to the West African datasets. Specimens from the eastern parts of South Africa showed higher genetic diversity estimates, possibly indicative of an initial colonisation site from eastern Africa. Two distinct phylogenetic clades were identified by Bayesian inference, forming distinct West African and South African groups. The divergence estimates showed similar ages for the T. swinderianus most recent common ancestor (MRCA) as previously reported. The MRCA estimates for the South African group identified a possible middle to late Pleistocene migratory event from eastern African into southern Africa. Further fine scale sampling across the African distribution range is however needed to provide more accurate assessments for future conservation management planning for the different sub-populations, as needed.
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来源期刊
CiteScore
4.00
自引率
19.00%
发文量
42
审稿时长
>12 weeks
期刊介绍: Research fields covered by VERTEBRATE ZOOLOGY are ta‍xo‍no‍my, mor‍pho‍logy, an‍at‍omy, phy‍lo‍ge‍ny (mo‍le‍cu‍lar and mor‍pho‍lo‍gy-based), hi‍sto‍ri‍cal bio‍geo‍gra‍phy, and pa‍lae‍on‍to‍lo‍gy of ver‍te‍bra‍tes.
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