College of Landscape Architecture and Life Science/Institute of Special Plants, Chongqing University of Arts and Sciences, Chongqing 402168, China.
Genes (Basel). 2022 Nov 27;13(12):2220. doi: 10.3390/genes13122220.
Understanding the striking diversity of the angiosperms is a paramount issue in biology and of interest to biologists. The Millettiod legumes is one of the most hyper-diverse groups of the legume family, containing many economically important medicine, furniture and craft species. In the present study, we explore how the interplay of past climate change, ecological opportunities and functional traits' evolution may have triggered diversification of the Millettiod legumes. Using a comprehensive species-level phylogeny from three plastid markers, we estimate divergence times, infer habit shifts, test the phylogenetic and temporal diversification heterogeneity, and reconstruct ancestral biogeographical ranges. We found that three dramatic accumulations of the Millettiod legumes occurred during the Miocene. The rapid diversification of the Millettiod legumes in the Miocene was driven by ecological opportunities created by the emergence of new niches and range expansion. Additionally, habit shifts and the switch between biomes might have facilitated the rapid diversification of the Millettiod legumes. The Millettiod legumes provide an excellent case for supporting the idea that the interplay of functional traits, biomes, and climatic and geographic factors drives evolutionary success.
理解被子植物惊人的多样性是生物学中的一个首要问题，也是生物学家感兴趣的问题。Millettiod 豆科植物是豆科植物中最具高度多样性的群体之一，包含许多具有经济重要性的药用、家具和工艺品物种。在本研究中，我们探讨了过去气候变化、生态机会和功能性状进化的相互作用如何引发 Millettiod 豆科植物的多样化。我们使用来自三个质体标记的综合种水平系统发育关系，估计了分歧时间，推断了习性转变，检验了系统发育和时间多样性异质性，并重建了祖先生物地理范围。我们发现，Millettiod 豆科植物在中新世发生了三次急剧的聚集。中新世 Millettiod 豆科植物的快速多样化是由新生态位的出现和范围扩张所创造的生态机会驱动的。此外，习性转变和生物群落之间的转换可能促进了 Millettiod 豆科植物的快速多样化。Millettiod 豆科植物为支持以下观点提供了一个极好的例子，即功能性状、生物群落以及气候和地理因素的相互作用推动了进化的成功。
