新热带细尾蛇科鱼类(Ostariophysi,Characiformes)多样化的核型变化的宏观进化后果。

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Accounts of Chemical Research Pub Date : 2023-10-01 Epub Date: 2023-08-11 DOI:10.1007/s10709-023-00191-z
Uedson Pereira Jacobina, Alany Itala Pontes, Lucas Costa, Gustavo Souza
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引用次数: 0

摘要

在新热带地区,淡水鱼类种类最多的科之一是单系细尾蛇科。在核型上,该家族在染色体数量上表现出高度多样性(2n = 54至64)。然而,很少有人讨论染色体变化是否与该家族的分支发生事件有关。在本研究中,我们评估了染色体变化在细尾蛇科进化多样化中的作用。我们的系统发育取样包括36个物种,并揭示了三个主要分支。祖先染色体数目重建揭示了2n的基本数目 = 54和在大多数衍生谱系中高频率的上升异倍体事件。我们的生物地理学重建表明,该家族起源于48-38 Mya的亚马逊地区,在15至8 Mya之间独立殖民了其他盆地。我们没有发现特定的染色体变化或多样化率的增加与新环境的定殖有关。另一方面,在中新世,Serrasalmus属和Pygocentrus属的多样化率增加,与2n的停滞有关 = 60.我们的数据表明,染色体重排可能在响尾蛇科的主要分支发生事件中发挥了重要的进化作用,揭示了它们可能是其多样化的进化驱动因素。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Macroevolutionary consequences of karyotypic changes in the neotropical Serrasalmidae fishes (Ostariophysi, Characiformes) diversification.

Macroevolutionary consequences of karyotypic changes in the neotropical Serrasalmidae fishes (Ostariophysi, Characiformes) diversification.

In the Neotropical region, one of the most diverse families of freshwater fishes is the monophyletic Serrasalmidae. Karyotypically, the family shows high diversity in chromosome numbers (2n = 54 to 64). However, little is discussed about whether the chromosomal changes are associated with cladogenetic events within this family. In the present study, we evaluated the role of chromosomal changes in the evolutionary diversification of Serrasalmidae. Our phylogenetic sampling included 36 species and revealed three main clades. The ancestral chromosome number reconstruction revealed the basic number 2n = 54 and a high frequency of ascending dysploid events in the most derived lineages. Our biogeographic reconstruction suggests an Amazonian origin of the family at 48-38 Mya, with independent colonization of other basins between 15 and 8 Mya. We did not find specific chromosomal changes or increased diversification rates correlated with the colonization of a new environment. On the other hand, an increase in the diversification rate was detected involving the genus Serrasalmus and Pygocentrus in the Miocene, correlated with the stasis of 2n = 60. Our data demonstrate that chromosomal rearrangements might have played an important evolutionary role in major cladogenetic events in Serrasalmidae, revealing them as a possible evolutionary driver in their diversification.

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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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