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首页> 外文期刊>Molecular phylogenetics and evolution >Evolutionary history of a prominent North American warbler clade: the Oporornis-Geothlypis complex.
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Evolutionary history of a prominent North American warbler clade: the Oporornis-Geothlypis complex.

机译：北美莺鸟进化枝的进化史：Oporornis-Geothlypis复合体。

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摘要

The avian genera Oporornis and Geothlypis are thought to represent a single lineage of closely related New World wood-warbler (AOU Family Parulidae) species. Phylogenetic relationships within this assemblage have not yet been addressed using molecular genetic methods. We used sequence data from three mitochondrial (mtDNA) genes (cytochrome b, ND2, and control region) to reconstruct an hypothesis of relationships for this group. Our ingroup sampling included 34 individuals representing all currently recognized Oporornis (4 spp.) and Geothlypis (9 spp.) species. Our results indicate that Geothlypis is paraphyletic with respect to Oporornis formosus. The four members of Oporornis do not form a clade but instead comprise a grade at the base of the Oporornis-Geothlypis topology. Two species within Geothlypis are polyphyletic. The Costa Rican form of G. aequinoctialis is embedded within the Neotropical G. semiflava complex, and the widespread North American form G. trichas consists of at least two groups, each having a closer affinity to other Geothlypis species than with each other. Five Geothlypis species differ from one another on average by about 2% uncorrected (cytochrome b) divergence, indicating a rapid and recent radiation within this genus. Our phylogenetic hypothesis for this assemblage indicates that morphological characters such as size and plumage brightness that have traditionally defined relationships with Geothlypis are not concordant with molecular data. Most members of Geothlypis are sedentary whereas all members of Oporornis are long-distance Nearctic migrants. Our topology suggests that Geothlypis is derived from a migrant, Oporornis-like ancestor that ceased migration and established itself as a sedentary breeding population in the Neotropics. We speculate that an ecological switch from forested to more open habitats at this time led to range expansion and diversification in this new lineage.
机译：禽类Oporornis和Geothlypis被认为代表了密切相关的新世界鸣鸟（AOU Family Parulidae）物种的单一血统。尚未使用分子遗传方法解决该组合中的系统发生关系。我们使用来自三个线粒体（mtDNA）基因（细胞色素b，ND2和控制区）的序列数据来重建该组关系的假设。我们的小组抽样包括34个个体，它们代表了所有目前公认的Oporornis（4 spp。）和Geothlypis（9 spp。）物种。我们的结果表明，Geothlypis与Oporornis formosus是共生的。 Oporornis的四个成员不构成分支，而是在Oporornis-Geothlypis拓扑的底部包括一个坡度。 Geothlypis内的两个物种是多系的。新热带亚种的G.semiflava复合体中嵌有哥斯达黎加形式的水母G. aquainoctialis，北美地区广泛分布的三亚种G. trichas至少由两组组成，每组与其他Geothlypis物种的亲和力更高。五个Geothlypis物种彼此之间平均相差约2％的未校正（细胞色素b）发散，表明该属中有最近的快速辐射。我们对这种组合的系统发育假说表明，形态特征（如大小和全身羽毛的亮度）在传统上与Geothlypis的关系与分子数据不一致。 Geothlypis的大多数成员都是久坐的，而Oporornis的所有成员都是长途的Nearctic移民。我们的拓扑结构表明，Geothlypis起源于迁徙的，类似Oporornis的祖先，该祖先停止迁徙并在新热带地区定居为久坐繁殖种群。我们推测，此时从森林转向更开放的生境的生态转变导致了这一新世系的范围扩展和多样化。

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