首页> 美国卫生研究院文献>BMC Genetics >Cytogenetic analysis of Phyllomedusa distincta Lutz 1950 (2n = 2x = 26) P. tetraploidea Pombal and Haddad 1992 (2n = 4x = 52) and their natural triploid hybrids (2n = 3x = 39) (Anura Hylidae Phyllomedusinae)
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Cytogenetic analysis of Phyllomedusa distincta Lutz 1950 (2n = 2x = 26) P. tetraploidea Pombal and Haddad 1992 (2n = 4x = 52) and their natural triploid hybrids (2n = 3x = 39) (Anura Hylidae Phyllomedusinae)

机译:1950(2n = 2x = 26)P.tetraploidea Pombal和Haddad1992(2n = 4x = 52)及其天然三倍体杂种(2n = 3x = 39)(AnuraHylidaePhyllomedusinae)的细胞遗传学分析)

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摘要

BackgroundNatural polyploidy has played an important role during the speciation and evolution of vertebrates, including anurans, with more than 55 described cases. The species of the Phyllomedusa burmeisteri group are mostly characterized by having 26 chromosomes, but a karyotype with 52 chromosomes was described in P. tetraploidea. This species was found in sintopy with P. distincta in two localities of São Paulo State (Brazil), where triploid animals also occur, as consequence of natural hybridisation. We analyse the chromosomes of P. distincta, P. tetraploidea, and their triploid hybrids, to enlighten the origin of polyploidy and to obtain some evidence on diploidisation of tetraploid karyotype.
机译:背景自然多倍体在包括无脊椎动物在内的脊椎动物的形成和进化过程中发挥了重要作用,描述的病例超过55个。缅甸疫杆菌(Phyllomedusa burmeisteri)组的种属主要特征是具有26条染色体,但在四倍体假单胞菌中描述了具有52条染色体的核型。该物种在圣保罗州(巴西)的两个地方与分离的体育杆菌一起被发现,这是自然杂交的结果,三倍体动物也在那里出现。我们分析了P.distancea,P.tetraploidea及其三倍体杂种的染色体,以启发多倍体的起源并获得有关四倍体核型二倍体化的一些证据。

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