Evolution of Philodendron (Araceae) species in Neotropical biomes
Evolution of Philodendron (Araceae) species in Neotropical biomes
复制标题
新热带生物群落中喜林芋（天南星科）物种的进化
作者：
Letícia Loss;C. Sakuragui;M. L. Soares;C. G. Schrago
喜林芋是天南星科植物中第二大多样性属，是热带单子叶植物科，沿着其在新热带地区的广泛地理分布而具有显著的形态多样性。虽然近年来对喜林芋属植物的进化进行了研究，但其种间的系统发育关系仍不清楚。此外，迄今为止进行的分析表明，包括所有美国代表的一个密切相关的属，Homalomena，在喜林芋分支。因此，有必要对这些谱系的系统发育和时间尺度进行彻底评估，以阐明这个新热带大属的进化克里思和模式，并揭示喜林芋沿着亚马逊和大西洋雨林以及南美洲开阔的干旱森林进化的生物地理历史。为此，我们估计了68种蔓绿绒属植物的分子亲缘关系，这是迄今为止收集的最大样本，旨在研究进化亲和力。我们还进行了祖先重建物种分布沿着生物群落。最后，我们将这些结果与蔓绿绒和千年健谱系多样化的推断时间尺度进行了比较。我们的估计表明，美国千年健是姐妹分支到喜林芋。喜林芋的早期多样化发生在早中新世到中中新世的亚马逊森林，随后分别在大西洋森林和热带稀树草原景观中殖民。根据喜林芋最后一个共同祖先的时代，该属的物种通过快速辐射而多样化，导致其在新热带地区广泛分布。
Philodendron is the second most diverse genus of the Araceae, a tropical monocot family with significant morphological diversity along its wide geographic distribution in the Neotropics. Although evolutionary studies of Philodendron were conducted in recent years, the phylogenetic relationship among its species remains unclear. Additionally, analyses conducted to date suggested the inclusion of all American representatives of a closely-related genus, Homalomena, within the Philodendron clade. A thorough evaluation of the phylogeny and timescale of these lineages is thus necessary to elucidate the tempo and mode of evolution of this large Neotropical genus and to unveil the biogeographic history of Philodendron evolution along the Amazonian and Atlantic rainforests as well as open dry forests of South America. To this end, we have estimated the molecular phylogeny for 68 Philodendron species, which consists of the largest sampling assembled to date aiming the study of the evolutionary affinities. We have also performed ancestral reconstruction of species distribution along biomes. Finally, we contrasted these results with the inferred timescale of Philodendron and Homalomena lineage diversification. Our estimates indicate that American Homalomena is the sister clade to Philodendron. The early diversification of Philodendron took place in the Amazon forest from Early to Middle Miocene, followed by colonization of the Atlantic forest and the savanna-like landscapes, respectively. Based on the age of the last common ancestor of Philodendron, the species of this genus diversified by rapid radiations, leading to its wide extant distribution in the Neotropical region.
影响因子：
10.7
作者：
dos Reis, Mario;Yang, Ziheng
通讯作者：
Yang, Ziheng