Karyological traits related to phylogenetic signal and environmental conditions within the Hymenaea clade (Leguminosae, Detarioideae)

Autor(es)

Serbin, Giulia M. ^[1] ; Machado, Raquel Moura ^[1] ; Pinto, Rafael Barbosa ^[2] ; Felizola Diniz Filho, Jose Alexandre ^[3] ; Goulart de Azevedo Tozzi, Ana Maria ^[1] ; Forni-Martins, Eliana Regina ^[1] ; Mansano, Vidal de Freitas ^[4]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Inst Biol, Dept Biol Vegetal, Cidade Univ Zeferino Vaz, Rua Monteiro Lobato 255, BR-13083862 Campinas, SP - Brazil

^[2] Univ Fed Goias, Inst Ciencias Biol, Dept Bot, Programa Posgrad Biodiversidade Vegetal, Campus Samambaia, BR-74690900 Goiania, Go - Brazil

^[3] Univ Fed Goias, Inst Ciencias Biol, Dept Ecol, Campus Samambaia, BR-74690900 Goiania, Go - Brazil

^[4] Inst Pesquisa Jardim Bot Rio de Janeiro, DIPEQ, Rua Pacheco Leao 915, BR-22460030 Rio De Janeiro, RJ - Brazil

• Tipo de documento: Artigo Científico
• Fonte: PERSPECTIVES IN PLANT ECOLOGY EVOLUTION AND SYSTEMATICS; v. 39, AUG 2019.
• Citações Web of Science: 0

Resumo

The Hymenaea Glade is a lineage of the subfamily Detarioideae of Leguminosae. The Glade is currently composed of three genera: Guibourtia, Hymenaea, and Peltogyne. The genera Guibourtia and Hymenaea present an Amphi-Atlantic distribution, whereas Peltogyne is exclusively found in the Neotropics. Previous studies have focused on the phylogeny of the group but there are no studies that demonstrate mechanisms that could be involved in the evolution of this Amphi-Atlantic Glade. The present work is the largest cytogenetic analysis for the group published so far. We aimed to provide a study of karyotypic characteristics of the Hymenaea Glade, interpreted using the plastidial trnK phylogenetic reconstruction as background. We analyzed karyological characteristics such as chromosome number, chromosome size, centromeric position, CMA/DAPI patterns, and banding for 5S and 45S rDNA. With the present data available, multivariate analyses (PCA) and Phylogenetic Eigenvector Regression (PVR) demonstrated that centromeric asymmetry and number of 5S rDNA sites may present a strong phylogenetic signal, whereas number of CMA(+) sites is associated with geography/climate characteristics. The association of CMA bands and geography has been reported for other legumes of the Caesalpinia group. This study demonstrates that the use of statistical tools for analyzing karyotypic characteristics can result in more precise interpretation of evolutionary processes related to structural changes in chromosomes and how these changes can also be related to environmental conditions. (AU)

• Processo FAPESP: 10/52488-9 - Repatriamento das informações das coleções botânicas depositadas nos herbários K e P de representantes do clado Miletioide sens. lat (Leguminosae, Papilonoideae) ocorrentes
• Beneficiário: Ana Maria Goulart de Azevedo Tozzi
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Regular