当前位置: X-MOL 学术Syst. Biol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Reticulate Evolution Helps Explain Apparent Homoplasy in Floral Biology and Pollination in Baobabs (Adansonia; Bombacoideae; Malvaceae)
Systematic Biology ( IF 6.5 ) Pub Date : 2019-11-06 , DOI: 10.1093/sysbio/syz073
Nisa Karimi 1 , Corrinne E Grover 2 , Joseph P Gallagher 2, 3 , Jonathan F Wendel 2 , Cécile Ané 1, 4 , David A Baum 1, 5
Affiliation  

Baobabs (Adansonia) are a cohesive group of tropical trees with a disjunct distribution in Australia, Madagascar, and continental Africa, and diverse flowers associated with two pollination modes. We used custom targeted sequence capture in conjunction with new and existing phylogenetic comparative methods to explore the evolution of floral traits and pollination systems while allowing for reticulate evolution. Our analyses suggest that relationships in Adansonia are confounded by reticulation, with network inference methods supporting at least one reticulation event. The best supported hypothesis involves introgression between A. rubrostipa and core Longitubae, both of which are hawkmoth pollinated with yellow/red flowers, but there is also some support for introgression between the African lineage and Malagasy Brevitubae, which are both mammal-pollinated with white flowers. New comparative methods for phylogenetic networks were developed that allow maximum-likelihood inference of ancestral states and were applied to study the apparent homoplasy in floral biology and pollination mode seen in Adansonia. This analysis supports a role for introgressive hybridization in morphological evolution even in a clade with highly divergent and geographically widespread species. Our new comparative methods for discrete traits on species networks are implemented in the software PhyloNetworks.

中文翻译:

网状进化有助于解释猴面包树(Adansonia;Bombacoideae;锦葵科)的花卉生物学和授粉中的表观同质性

猴面包树(Adansonia)是一组有凝聚力的热带树木,分布于澳大利亚、马达加斯加和非洲大陆,以及与两种授粉模式相关的多种花卉。我们使用定制的靶向序列捕获结合新的和现有的系统发育比较方法来探索花卉性状和授粉系统的进化,同时允许网状进化。我们的分析表明 Adansonia 中的关系被网状结构混淆,网络推理方法至少支持一个网状结构事件。最受支持的假设涉及 A. rubrostipa 和核心 Longitubae 之间的基因渗入,两者都是用黄色/红色花朵授粉的天蛾,但也有一些支持非洲谱系和马达加斯加 Brevitubae 之间的基因渗入,它们都是哺乳动物授粉的白色花朵。开发了用于系统发育网络的新比较方法,允许对祖先状态进行最大似然推断,并应用于研究 Adansonia 中花卉生物学和授粉模式中的明显同质性。该分析支持渐进杂交在形态进化中的作用,即使在具有高度分化和地理分布广泛的物种的进化枝中也是如此。我们对物种网络离散性状的新比较方法在 PhyloNetworks 软件中实现。该分析支持渐进杂交在形态进化中的作用,即使在具有高度分化和地理分布广泛的物种的进化枝中也是如此。我们对物种网络离散性状的新比较方法在 PhyloNetworks 软件中实现。该分析支持渐进杂交在形态进化中的作用,即使在具有高度分化和地理分布广泛的物种的进化枝中也是如此。我们对物种网络离散性状的新比较方法在 PhyloNetworks 软件中实现。
更新日期:2019-11-06
down
wechat
bug