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

olecular cytogenetics of Dictyoloma vandellianum A. Juss. and the ancestral karyotype of Rutacea

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Author(s):
Santos, Amanda [1] ; Silva, Ana Emilia Barros E. [2] ; Groppo, Milton [3] ; Guerra, Marcelo [1]
Total Authors: 4
Affiliation:
[1] Univ Fed Pernambuco, Lab Citogenet & Evolucao Plantas, Dept Bot, Ctr Biociencias, BR-50670901 Recife, PE - Brazil
[2] Univ Fed Paraiba, Lab Citogenet Plantas, Dept Biociencias, Ctr Ciencias Agr, BR-58397000 Areia, PB - Brazil
[3] Univ Sao Paulo, Dept Biol, Fac Filosofia Ciencias & Letras Ribeirao Preto, BR-14051901 Ribeirao Preto, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Acta Botanica Brasilica; v. 35, n. 4, p. 582-588, OCT-DEC 2021.
Web of Science Citations: 1
Abstract

Determination of the chromosome base number of a taxon is fundamental to understanding karyotypic variation and its implications for the evolution of that group. This usually requires careful evaluation of cytological literature and robust phylogenetic support. The base number for the family Rutaceae (x = 9 or x = 18) has long been the subject of debate. Here, we analyzed the banding pattern, rDNA sites, and genome size of Dictyoloma vandellianum, subfamily Cneoroideae, the sister group of the remaining Rutaceae, and revised critical points about the chromosome base number of the family. We found that this species has n = 9, which differs from the n = 18 possessed by other cytologically known Cneoroideae species. Thus, n = 9 occurs in the main clades of Rutaceae and is the most probable base number of the family. The hypothesis of x = 18 as the base number is no longer sustainable, although n = 18 is very common in Rutaceae. Moreover, the fluorescent banding pattern and the relatively large genome size (1C = 1.3 pg) of D. vandellianum suggest that its chromosomal organization is highly divergent from Aurantieae, the only large Rutaceae clade where species with n = 9 are greatly dominant. (AU)

FAPESP's process: 16/06260-2 - Integrative systematic studies in Neotropical families, with emphasis on Rutaceae, Asteraceae and Rubiaceae
Grantee:Milton Groppo Júnior
Support Opportunities: Regular Research Grants
FAPESP's process: 07/06336-0 - Phylogenetic and systematic studies in Rutaceae: cladistic analysis and position of Almeidea A.St.-Hil. within Galipeinae (Galipeae, Rutoideae) inferred from morphological and molecular data.
Grantee:Carla Poleselli Bruniera
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 06/03170-0 - Phylogenetic and systematic studies in Rutaceae: phylogeny and delimitation of Galipeinae (Galipeae) based on nuclear and plastidial DNA sequences
Grantee:Milton Groppo Júnior
Support Opportunities: Research Grants - Young Investigators Grants