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

Autor(es)

Romero-da-Cruz, V, Maria ; Guimaraes, Rafael ^{[1, 2]} ; Devecchi, Marcelo F. ^[3] ; Pirani, Jose R. ^[3] ; Forni-Martins, Eliana R. ^[1]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: Rev. bras. Bot.; JUL 2021.
• Citações Web of Science: 1

Resumo

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)

• Processo FAPESP: 14/18002-2 - Sapindales: filogenia e diversificação na região neotropical
• Beneficiário: José Rubens Pirani
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 16/06572-4 - Sequências repetitivas em Sapindales: impacto evolutivo em uma escala global
• Beneficiário: María Victoria Romero da Cruz
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado