通过DNA条形码来划分物种界限,揭示了Stelliferinae (Sciaenidae) 中未经描述的多样性
Tárcia Fernanda da Silva1, Iracilda Sampaio2, Arturo Angulo3
1Laboratory of Fish Microbiology, Institute of Coastal Studies, Federal University of Para (UFPA), Braganca, Para, Brazil.
PloS one
|December 28, 2023
概括
使用DNA条形编码对Stelliferinae鱼类的分子分析揭示了30-32个不同的血统,这表明该亚科中存在大量尚未发现的物种多样性,并强调需要进行分类学修订.
科学领域:
- 鱼类学 鱼类学 鱼类学
- 分子系统学 分子系统学
- 生物多样性研究 生物多样性研究
背景情况:
- 科 (Stelliferinae) 子族,是科 (Sciaenidae) 家族的一部分,包括五个属的51个物种.
- 之前的研究支持了Stelliferinae的单性,但缺乏关于基因间关系和物种多样性的共识.
研究的目的:
- 利用DNA条形码和分子方法来验证Stelliferinae亚家族内的物种划分.
- 调查潜在的神秘物种并评估整体物种多样性.
主要方法:
- 测序细胞氧化酶C子单元I (COI) 基因用于DNA条形码.
- 种类划分算法的应用:自动条码差距发现 (ABGD),通用混合耶鲁凝聚 (GMYC) 和贝叶斯式鱼类树过程 (bPTP).
主要成果:
- 多种方法的一致结果划分了30-32个分子操作分类学单位 (MOTU),与已知的物种大致一致.
- 已识别的物种 (例如,Stellifer menezesi和Stellifer gomezi) 代表一个单一的MOTU.
- 在其他物种 (例如,Odontoscion dentex,Bairdiella chrysoura) 中检测到了不同的血统,这表明了神秘的多样性.
结论:
- 这项研究表明,在Stelliferinae亚家族中存在未被描述的多样性.
- 遗传分歧和哈普洛型谱系支持神秘物种的存在.
- 强化了对Stelliferinae进行全面的分类学审查的必要性.
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