Hybridization: a 'double-edged sword' for Neotropical plant diversity
Hybridization: a 'double-edged sword' for Neotropical plant diversity
复制标题
杂交：新热带植物多样性的“双刃剑”
DOI：
10.1093/botlinnean/boab070
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发表时间：
2022
影响因子：
2.4
通讯作者：
Schley R
中科院分区：
文献类型：
--
作者：
Schley R
杂交可以促进进化多样化和灭绝，并在植物进化中发挥了关键作用，在一些温带植物区系中，已知有25%的物种杂交。然而，在物种丰富的新热带区植物群中，杂交在多样性进化中的作用仍然不清楚。我们的审查审查研究杂交种子植物从整个新热带区，并探讨其结果对新热带区植物进化。我们回顾了每生物群系的基础上的研究和杂交的进化结果的频谱是显而易见的整个新热带生物群系和类群。这些影响范围从短期的影响，如扩大生态幅度的杂交后代与超亲表型和遗传沼泽，通过长期的影响，如新的谱系的产生。在这些研究中，出现了某些主题，例如安第斯公园物种丰富的植物辐射之间的普遍杂交，这表明杂交在快速多样化事件中的作用。最后，我们强调，杂交是相对欠研究的新热带区植物群，尽管其显着的物种丰富度。基因组技术的出现可以促进杂交及其在未充分研究的生物群落和植物群中的作用的研究。越来越多的基因组资源的可用性，最终将允许热带和温带植物区系之间的比较，从而揭示了跨越纬度生物多样性梯度杂交的进化影响。
Hybridization can facilitate both evolutionary diversification and extinction and has had a critical role in plant evolution, withc.25% of species known to hybridize in some temperate floras. However, in the species-rich Neotropical flora, the role of hybridization in the evolution of diversity remains unclear. Our review examines studies of hybridization in seed plants from across the Neotropics and explores its outcomes on Neotropical plant evolution. We review studies on a per-biome basis and a spectrum of evolutionary outcomes from hybridization are evident across Neotropical biomes and taxa. These range from short-term impacts, such as the broadening of ecological amplitude in hybrid progeny with transgressive phenotypes and genetic swamping, through to long term impacts, such as the generation of new lineages. Among these studies certain themes emerge, such as the pervasive hybridization among species-rich plant radiations from the Andean páramos, suggesting a role for hybridization in rapid diversification events. Finally, we highlight that hybridization is relatively understudied in the Neotropical flora, despite its remarkable species richness. The advent of genomic techniques can facilitate the study of hybridization and its effects in understudied biomes and plant groups. The increasing availability of genomic resources will eventually allow comparisons between tropical and temperate floras and therefore shed light on the evolutionary impacts of hybridization across the latitudinal biodiversity gradient.