Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Av. P. H. Rolfs s/n, Vicosa, Minas Gerais, 36570-000, Brazil.
Environmental Genomics Group, Christian-Albrechts University of Kiel, and the Max Planck Institute for Evolutionary Biology, Plön, Germany.
J Plant Res. 2024 May;137(3):377-393. doi: 10.1007/s10265-024-01523-6. Epub 2024 Feb 19.
The tree genus Dimorphandra (Fabaceae), which contains 26 species divided into three subgenera, was studied using DNA sequence data from six chloroplast genome regions (cpDNA) and the nuclear internal transcribed spacer (ITS). The analyses, which included Bayesian phylogenies and haplotype networks, ancestral area reconstructions, and ecological niche modeling, allowed for exploring the evolutionary history of Dimorphandra. Within the subgenus Phaneropsia, the cpDNA sequence data were more closely-related to species from the genus Mora, while the ITS sequence data displayed a closer phylogenetic relationship with the subgenus Pocillum. This incongruence may be due to incomplete lineage sorting associated with ancient polymorphisms. The Amazonian Dimophandra lineages were highly polymorphic and divergent, while those from the Cerrado and the Atlantic Forest had low levels of polymorphisms. The Amazon likely gave rise to the Dimophandra lineage that produced the Cerrado species, while a Cerrado lineage likely gave rise to the Atlantic Forest species. Habitat shifts were identified as a key factor in shaping the late evolutionary history of Dimorphandra.
树属二歧曼陀罗（豆科），包含 26 种，分为三个亚属，使用来自六个叶绿体基因组区域（cpDNA）和核内转录间隔区（ITS）的 DNA 序列数据进行了研究。这些分析包括贝叶斯系统发育和单倍型网络、祖地重建和生态位建模，以探索二歧曼陀罗的进化历史。在 Phaneropsia 亚属内，cpDNA 序列数据与 Mora 属的物种更为密切相关，而 ITS 序列数据与 Pocillum 亚属具有更密切的系统发育关系。这种不一致可能是由于与古老多态性相关的不完全谱系分选所致。亚马逊河的 Dimophandra 谱系高度多态和分化，而塞拉多和大西洋森林的谱系则具有较低的多态性。亚马逊可能是产生塞拉多物种的 Dimophandra 谱系的起源地，而塞拉多的谱系可能是产生大西洋森林物种的起源地。生境转移被确定为塑造二歧曼陀罗晚期进化历史的关键因素。
