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首页> 美国卫生研究院文献>Genes >Chromosome Painting in Neotropical Long- and Short-Tailed Parrots (Aves Psittaciformes): Phylogeny and Proposal for a Putative Ancestral Karyotype for Tribe Arini
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Chromosome Painting in Neotropical Long- and Short-Tailed Parrots (Aves Psittaciformes): Phylogeny and Proposal for a Putative Ancestral Karyotype for Tribe Arini

机译：新热带长尾鹦鹉和短尾鹦鹉（AvesPsittaciformes）的染色体绘画：系统发育和关于部落阿里尼人假定祖先核型的建议

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Most Neotropical Psittacidae have a diploid number of 2n = 70, and a dichotomy in chromosome patterns. Long-tailed species have biarmed macrochromosomes, while short-tailed species have telo/acrocentric macrochromosomes. However, the use of chromosome painting has demonstrated that karyotype evolution in Psittacidae includes a high number of inter/intrachromosomal rearrangements. To determine the phylogeny of long- and short-tailed species, and to propose a putative ancestral karyotype for this group, we constructed homology maps of Pyrrhura frontalis (PFR) and Amazona aestiva (AAE), belonging to the long- and short-tailed groups, respectively. Chromosomes were analyzed by conventional staining and fluorescent in situ hybridization using whole chromosome paints of Gallus gallus and Leucopternis albicollis. Conventional staining showed a karyotype with 2n = 70 in both species, with biarmed macrochromosomes in PFR and telo/acrocentric chromosomes in AAE. Comparison of the results with the putative avian ancestral karyotype (PAK) showed fusions in PFR of PAK1p/PAK4q (PFR1) and PAK6/PAK7 (PFR6) with a paracentric inversion in PFR6. However, in AAE, there was only the fusion between PAK6/7 (AAE7) with a paracentric inversion. Our results indicate that PFR retained a more basal karyotype than long-tailed species previously studied, and AAE a more basal karyotype for Neotropical Psittacidae analyzed so far.
机译：多数新热带假单胞菌科的二倍体数为2n = 70，并且染色体模式二分法。长尾物种具有双臂大染色体，而短尾物种具有端粒/近端大染色体。但是，使用染色体绘画已证明，在Psittacidae中的核型进化包括大量的染色体间/染色体内重排。为了确定长尾和短尾物种的系统发育，并为该群体提出一个推测的祖先核型，我们构建了长尾和短尾的Pyrrhura frontalis（PFR）和Amazona aestiva（AAE）的同源图。组分别。通过传统的染色和荧光原位杂交技术，使用了鸡鸡和白粉虫的全染色体涂料来分析染色体。常规染色显示两个物种的核型均为2n = 70，PFR中为双臂大染色体，而AAE中为端粒/近端中心染色体。将结果与推定的鸟类祖先核型（PAK）进行比较，结果显示PAK1p / PAK4q（PFR1）和PAK6 / PAK7（PFR6）的PFR融合，而PFR6则发生了同心反转。但是，在AAE中，只有PAK6 / 7（AAE7）与副中心反转融合。我们的结果表明，到目前为止，PFR保留了比以前研究的长尾物种更多的基础核型，而AAE到目前为止分析的新热带鹦鹉嘴类保留了更多的基础核型。

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