INVESTIGADORES
FERRUCCI Maria silvia
artículos
Título:
Genome size evolution in Sapindaceae at subfamily level: A case of study of independence in relation to kariological and palynological traits
Autor/es:
COULLERI, J.P.; URDAMPILLETA, J. D.,; FERRUCCI, M. S.
Revista:
BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Lugar: Londres; Año: 2014 vol. 174 p. 589 - 600
ISSN:
0024-4074
Resumen:
Sapindaceae s.l. is a moderately large family of trees, shrubs, and lianas.Current knowledge on genome size and how it varies in this family is scarce.This research aims at characterizing DNA content in 39 species of Sapindaceae,mainly in the Paullinieae s.s. tribe, by analysing the variation in genome sizerelative to karyotypical and palynological features. Nuclear DNA amount wasmeasured by flow cytometry, and linear regression analyses were conducted toanalyse the relationship between genome size variation and various karyotypicand palynological features. Genome size varied 9-fold among species, rangingfrom 1C = 0.305 pg (Lophostigma plumosum) to 2.71 pg (Cardiospermumheringeri). The low regression coefficients obtained suggest that genomesize mainly varies independently of karyotypic and palynological features.Regarding karyotype evolution, constant chromosome number, but variable genomesize in Houssayanthus, Paullinia and Serjania suggest thatstructural changes are more important than numerical change. By contrast, in Cardiospermumand Urvillea, variation in both chromosome number and genome sizesupports the suggestion that both numerical and structural changes areimportant in the karyotype evolution of these genera.