Molecular systematics of the enigmatic 'phascolosoricine' marsupials of New Guinea
Molecular systematics of the enigmatic 'phascolosoricine' marsupials of New Guinea
复制标题
新几内亚神秘的“phascolosoricine”有袋动物的分子系统学
DOI：
--
复制
发表时间：
2004
期刊：
影响因子：
--
通讯作者：
M. Westerman
中科院分区：
文献类型：
--
作者：
C. Krajewski;G. Moyer;Justin T. Sipiorski;Matthew G. Fain;M. Westerman
先前对线粒体细胞色素-b和12S rRNA的DNA序列以及核鱼精蛋白P1基因的分析表明，新几内亚dascolsorex属和Neophascogale （phascolsoricines）是袋鼬（Dasyurus）和袋獾（Sarcophilus）的姐妹类群。这与一种普遍的看法背道而驰，即相角胞嘧啶在解剖学上是原始的，与其他的dasyurids只有远亲关系。我们报告了两个额外的线粒体位点（tRNAVal和16S rRNA）和核位点（光受体结合蛋白外显子1，β -纤维蛋白原内含子7）的DNA序列，这些位点来自phascolsorex dorsalis， Neophascogale lorentzii和其他三种dasyurid物种。这些序列和之前发表的序列组成了一个7053个核苷酸的数据集。系统发育分析表明，phasolosoricines形成了一个分支，高度确定为Dasyurus + Sarcophilus的姐妹。这一结果是由线粒体和核基因独立获得的，不能归因于分类群或基因取样偏差、成分异质性或使用过于简单的系统发育估计程序。一项对已发表的关于相梭氨酸关系的形态学数据的重新评估表明，尽管与分子结果的冲突是显著的，但它仅限于少数相关的牙齿特征，这些特征在它们的进化中表现出相当大的同质性。
Previous analyses of DNA sequences for mitochondrial cytochrome-b and 12S rRNA, along with the nuclear protamine P1 genes, suggested that the New Guinean dasyurid genera Phascolosorex and Neophascogale (phascolosoricines) form the sister groups of quolls (Dasyurus) and Tasmanian devils (Sarcophilus). This runs counter to a common perception that phascolosoricines are anatomically primitive and only distantly related to other dasyurids. We report the DNA sequences of two additional mitochondrial loci (tRNAVal and 16S rRNA) and nuclear loci (interphotoreceptor binding protein exon 1, beta-fibrinogen intron 7) from Phascolosorex dorsalis, Neophascogale lorentzii, and all but three other dasyurid species. These sequences, along with those previously published, comprise a dataset of 7053 nucleotides. Phylogenetic analyses indicate that phascolosoricines form a clade that is highly resolved as sister to Dasyurus + Sarcophilus. This result is obtained independently by mitochondrial and nuclear genes, and cannot be attributed to taxon- or gene-sampling bias, compositional heterogeneity, or the use of overly simplistic phylogenetic estimation procedures. A re-evaluation of published morphological data bearing on the relationships of phascolosoricines demonstrates that, although the conflict with molecular results is significant, it is limited to a small number of correlated dental features that show considerable homoplasy in their evolution.
影响因子：
10.7
作者：
Felsenstein, J;Churchill, GA
通讯作者：
Churchill, GA