Advanced search
Start date
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Chromosome numbers in Homalolepis Turcz. and their significance in Simaroubaceae evolution

Full text
Romero-da-Cruz, V, Maria ; Guimaraes, Rafael [1, 2] ; Devecchi, Marcelo F. [3] ; Pirani, Jose R. [3] ; Forni-Martins, Eliana R. [1]
Total Authors: 5
[1] Univ Estadual Campinas, Inst Biol, Dept Plant Biol, UNICAMP, POB 6109, BR-13083970 Campinas, SP - Brazil
[2] Fed Univ Ceara UFC, Sci Ctr, Dept Biol, BR-60440900 Fortaleza, Ceara - Brazil
[3] Romero-da-Cruz, Maria, V, Univ Sao Paulo, Dept Bot, SPF Herbarium, Rua Matao 277, BR-05508900 Sao Paulo - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Rev. bras. Bot.; JUL 2021.
Web of Science Citations: 1

Homalolepis was described by Turczaninow in 1848 and reestablished by Devecchi et al. in 2018, enclosing mostly the extra-Amazonian species previously included in two sections of Simaba Aubl.. We performed the first cytogenetic analysis in Homalolepis and, by surveying chromosome numbers of other Simaroubaceae representatives, reconstructed the evolution of chromosome numbers in the family, using ChromEvol software. The four Homalolepis species showed 2n = 32 and two or four CMA(+) bands. In situ hybridization showed a diverse distribution of ribosomal DNA sites (5S and 18S), positioned on the same chromosome pair in H. floribunda (A. St.-Hil.) Devecchi \& Pirani or on different chromosome pairs in H. arenaria (Devecchi \& Pirani) Devecchi \& Pirani. The basic chromosome number here indicated for Simaroubaceae is x = 12, from which chromosome numbers of other genera were derived by ascending dysploidy, with polyploidy occurring in Ailanthus Desf. only. Homalolepis presents x = 16, derived by ascending disploidy. (AU)

FAPESP's process: 14/18002-2 - Sapindales: phylogeny and diversification in the Neotropical Region
Grantee:José Rubens Pirani
Support type: Research Projects - Thematic Grants
FAPESP's process: 16/06572-4 - Repetitive sequences in Sapindales: evolutionary impact on a global scale
Grantee:María Victoria Romero da Cruz
Support type: Scholarships in Brazil - Post-Doctorate