Genome size variation and species diversity in salamanders

Genome size variation and species diversity in salamanders
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蝾螈的基因组大小变异和物种多样性

DOI:
10.1111/jeb.13412
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发表时间:
2016
期刊:
bioRxiv
影响因子:
--
通讯作者:
B. Sclavi
B. Sclavi
中科院分区:
--
文献类型:
--
作者:
J. Herrick;B. Sclavi

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蝾螈 (Urodela) 拥有最大的脊椎动物基因组之一,大小从 10 到 120 pg 不等。尽管基因组大小的变化通常是在没有选择压力的情况下随机发生的,但在特定的脊椎动物谱系中,基因组大小变化的非随机模式是明显的。一些报告表明物种丰富度和基因组大小之间存在关系,但这种关系的确切性质在不同分类群内部和之间仍不清楚。在这里,我们报告i)蝾螈进化枝中单倍体基因组大小(C值)与科分类水平上的物种丰富度之间存在负相关关系; ii) C值和物种丰富度与进化枝冠龄的相关性,但与多样化率无关; iii) C 值与地理区域或气候生态位率之间的密切关联。最后,我们报告了有尾目科和属水平进化枝的 C 值多样性和物种多样性之间的关系。
Salamanders (Urodela) have among the largest vertebrate genomes, ranging in size from 10 to 120 pg. Although changes in genome size often occur randomly and in the absence of selection pressure, non-random patterns of genome size variation are evident among specific vertebrate lineages. Several reports suggest a relationship between species richness and genome size, but the exact nature of that relationship remains unclear both within and across different taxonomic groups. Here we report i) a negative relationship between haploid genome size (C-value) and species richness at the family taxonomic level in salamander clades; ii) a correlation of C-value and species richness with clade crown-age but not with diversification rates; iii) strong associations between C-value and either geographical area or climatic niche rate. Finally, we report a relationship between C-value diversity and species diversity at both the family and genus level clades in urodeles.
DOI: 10.1186/s12862-016-0628-x
发表时间: 2016-03-22
影响因子: 3.4
作者:
Leaché AD;Banbury BL;Linkem CW;de Oca AN
通讯作者: de Oca AN
DOI: 10.1093/oxfordjournals.molbev.a003798
发表时间: 2001-02-01
影响因子: 10.7
作者:
Bensasson, D;Petrov, DA;Hewitt, GM
通讯作者: Hewitt, GM