Chromosome evolution in Neotropical butterflies.
Chromosome evolution in Neotropical butterflies.
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DOI：
10.1111/j.1601-5223.2013.00008.x
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发表时间：
2013-06
期刊：
影响因子：
2.7
通讯作者：
A. Saura;B. von Schoultz;A. Saura;K. Brown
中科院分区：
文献类型：
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作者：
A. Saura;B. von Schoultz;A. Saura;K. Brown
本文列出了新热带弄蝶科65种和粉蝶科104种或亚种的染色体数目。在弄蝶科中，Pyrrhopygini族的众数n = 28，Eudaminae和Pyrgini族的众数n = 31，而弄蝶亚科的众数n = 29。在粉蝶科中，Coliadinae有一个很强的模式n = 31，在粉蝶亚科中，Anthocharidini几乎固定为n = 15，而粉蝶族的变化与n = 26是最常见的染色体数目。双斑蝶亚科有很大的变异。我们讨论了这些结果的背景下，染色体数目超过1400新热带区蝴蝶种和亚种来自约3000人口发表在这里和早期的一系列文件。总体结果表明，许多新热带区类群的核型不稳定，有几个衍生的众数或根本没有，而世界其他地区的鳞翅目昆虫几乎都有n = 29-31的众数。可能染色体数目的变化在生物相互作用驱动的物种形成过程中变得固定。种群的细分和结构化促进了核型的变化。稳定染色体数目的因素包括相同数目的物种之间的杂交、迁移、性选择以及可能的染色体在细胞核内的分布。
We list the chromosome numbers for 65 species of Neotropical Hesperiidae and 104 species or subspecies of Pieridae. In Hesperiidae the tribe Pyrrhopygini have a modal n = 28, Eudaminae and Pyrgini a modal n = 31, while Hesperiinae have n = around 29. Among Pieridae, Coliadinae have a strong modal n = 31 and among Pierinae Anthocharidini are almost fixed for n = 15 while Pierini vary with n = 26 as the most common chromosome number. Dismorphiinae show wide variation. We discuss these results in the context of chromosome numbers of over 1400 Neotropical butterfly species and subspecies derived from about 3000 populations published here and in earlier papers of a series. The overall results show that many Neotropical groups are characterized by karyotype instability with several derived modal numbers or none at all, while almost all taxa of Lepidoptera studied from the other parts of the world have one of n = 29-31 as modal numbers. Possibly chromosome number changes become fixed in the course of speciation driven by biotic interactions. Population subdivision and structuring facilitate karyotype change. Factors that stabilize chromosome numbers include hybridization among species sharing the same number, migration, sexual selection and possibly the distribution of chromosomes within the nucleus.