X-chromosomal window into the evolutionary history of the guenons (Primates: Cercopithecini).
X-chromosomal window into the evolutionary history of the guenons (Primates: Cercopithecini).
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X 染色体窗口了解长尾猴（灵长类动物：Cercopithecini）的进化史。
DOI：
10.1016/j.ympev.2005.01.009
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
Disotell,ToddR
中科院分区：
文献类型：
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作者：
Tosi,AnthonyJ;Detwiler,KateM;Disotell,ToddR
对长尾猴的分子研究表明，树栖的长尾猴在长尾猴族中形成了一个单系群。然而，这些树栖同源物之间的进化关系仍然没有得到很好的解决。目前的工作标志着第一次尝试通过长核序列的系统发育分析来重建该组的历史。我们调查了19个长尾猴和7个外群分类群，寻找与人类Xq13.3部分同源的一个约9.3kb的X染色体DNA片段。这些序列的简约性和最大似然分析一致恢复两个强有力的支持模式内的树栖长尾猴分支：（1）cephus和mitis种组的成员的聚类，和（2）单系聚合，包括莫纳，疏忽，和diana种组。虽然长尾猴偶尔在野外杂交，不同物种组的杂交形式不聚集在一起的姐妹类群的X染色体树，这表明这里推断的两个分支是不是网状模式，由于最近的基因流。这些分支最有可能是祖先杂交或真正的系统发育历史的结果。我们主张后一种解释，因为同样的两个聚合（cephus/mitis和莫纳/neglectus/diana）被恢复，尽管支持较弱，由一些较早的分析。最后，X染色体分歧日期估计的一些节点中的长尾猴辐射。在11.5（±1.3）MYA时，长尾猴和papionin谱系的分歧似乎是一个特别可靠的估计，因为它是从线粒体和X染色体研究中推断出来的，每一个都使用不同的化石校准点。
Molecular studies of the guenons suggest that the arboreal Cercopithecus species form a monophyletic group within the tribe Cercopithecini. However, the evolutionary relationships among these arboreal congeners remain poorly resolved. The present work marks the first attempt to reconstruct the history of this group through the phylogenetic analysis of long nuclear sequences. We surveyed 19 guenons and seven outgroup taxa for a ∼9.3kb fragment of X-chromosomal DNA homologous to a portion of human Xq13.3. Parsimony and maximum likelihood analyses of these sequences consistently recover two strongly-supported patterns within the arboreal Cercopithecus clade: (1) a clustering of members of the cephus and mitis species groups, and (2) a monophyletic aggregate including the mona, neglectus, and diana species groups. Although guenons occasionally hybridize in the wild, interbreeding forms of different species groups do not cluster together as sister-taxa in the X-chromosomal tree, suggesting that the two clades inferred here are not reticulate patterns due to recent gene flow. These clades are most likely the result of either ancestral hybridization or true phylogenetic history. We advocate the latter explanation because the same two aggregates (cephus/mitis and mona/neglectus/diana) are recovered, albeit with weak support, by a number of earlier analyses. Finally, X-chromosomal divergence dates are estimated for a number of nodes in the guenon radiation. The divergence of guenon and papionin lineages at 11.5 (±1.3) MYA appears to be a particularly robust estimate since it is inferred from both mitochondrial and X-chromosomal studies, each using different fossil calibration points.