Out of Tanganyika: genesis, explosive speciation, key-innovations and phylogeography of the haplochromine cichlid fishes.
Out of Tanganyika: genesis, explosive speciation, key-innovations and phylogeography of the haplochromine cichlid fishes.
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DOI：
10.1186/1471-2148-5-17
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发表时间：
2005-02-21
影响因子：
3.4
通讯作者：
Meyer A
中科院分区：
文献类型：
--
作者：
Salzburger W;Mack T;Verheyen E;Meyer A
东非慈鲷的适应性辐射以其惊人的多样性和惊人的快速物种形成速度而闻名。东非全部 2,500 种慈鲷中约 80% 以及维多利亚湖（约 500 种）和马拉维湖（约 1,000 种）的几乎所有慈鲷种类都是单倍体。在这里，我们提出了迄今为止最广泛的系统发育和系统发育地理学分析，其中包括约 100 个物种，并且基于约 2,000 bp 的线粒体 DNA。我们的分析表明，所有单倍体谱系最终都源自坦噶尼喀湖特有物种。我们发现单倍体的三个最古老谱系虽然广泛分布在非洲，但物种相对匮乏，而第四个新定义的谱系——“现代单倍体”——包含无与伦比的多样性，占世界约 25,000 种硬骨鱼物种的 7% 以上。现代单倍体的祖先很可能是一位河流通才，反复产生了现在在几个物种群体中发现的类似生态形态。此外，坦噶尼喀 Tropheini 源自该河流祖先，这表明它们成功地重新殖民了坦噶尼喀湖，并与已经建立的丽鱼适应性辐射平行形成了物种。与大多数其他已知的适应性辐射例子相比，这些通才祖先源自坦噶尼喀湖高度多样化和专业化的特有物种。对生活史特征的重建表明，在导致现代单倍体的祖先谱系中，雄性个体臀鳍上的特征性卵斑进化了。我们得出的结论是，坦噶尼喀湖是所有单倍体谱系的地理和遗传摇篮。在“现代单倍体”的复制适应性辐射的祖先中，出现了行为（母体口孵）、形态（卵斑点）和性选择（颜色多态性）的关键创新。这些可能——再加上大型湖泊栖息地多样性提供的生态机会——导致了它们的进化成功和爆炸性物种形成的倾向。
The adaptive radiations of cichlid fishes in East Africa are well known for their spectacular diversity and their astonishingly fast rates of speciation. About 80% of all 2,500 cichlid species in East Africa, and virtually all cichlid species from Lakes Victoria (~500 species) and Malawi (~1,000 species) are haplochromines. Here, we present the most extensive phylogenetic and phylogeographic analysis so far that includes about 100 species and is based on about 2,000 bp of the mitochondrial DNA. Our analyses revealed that all haplochromine lineages are ultimately derived from Lake Tanganyika endemics. We find that the three most ancestral lineages of the haplochromines sensu lato are relatively species poor, albeit widely distributed in Africa, whereas a fourth newly defined lineage – the 'modern haplochromines' – contains an unparalleled diversity that makes up more than 7% of the worlds' ~25,000 teleost species. The modern haplochromines' ancestor, most likely a riverine generalist, repeatedly gave rise to similar ecomorphs now found in several of the species flocks. Also, the Tanganyikan Tropheini are derived from that riverine ancestor suggesting that they successfully re-colonized Lake Tanganyika and speciated in parallel to an already established cichlid adaptive radiation. In contrast to most other known examples of adaptive radiations, these generalist ancestors were derived from highly diverse and specialized endemics from Lake Tanganyika. A reconstruction of life-history traits revealed that in an ancestral lineage leading to the modern haplochromines the characteristic egg-spots on anal fins of male individuals evolved. We conclude that Lake Tanganyika is the geographic and genetic cradle of all haplochromine lineages. In the ancestors of the replicate adaptive radiations of the 'modern haplochromines', behavioral (maternal mouthbrooding), morphological (egg-spots) and sexually selected (color polymorphism) key-innovations arose. These might be – together with the ecological opportunity that the habitat diversity of the large lakes provides – responsible for their evolutionary success and their propensity for explosive speciation.
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影响因子：
1.9
作者：
Bernatchez, L;Chouinard, A;Lu, GQ
通讯作者：
Lu, GQ
DOI：
10.1098/rspb.1998.0569
发表时间：
1998-12-07
影响因子：
4.7
作者：
Goodwin, NB;Balshine-Earn, S;Reynolds, JD
通讯作者：
Reynolds, JD
影响因子：
3.9
作者：
Baric, S;Salzburger, W;Sturmbauer, C
通讯作者：
Sturmbauer, C
影响因子：
4.1
作者：
Kocher, TD;Conroy, JA;Lockwood, SF
通讯作者：
Lockwood, SF
影响因子：
3.2
作者：
Lezzar, KE;Tiercelin, JJ;Klerkx, J
通讯作者：
Klerkx, J