Please use this identifier to cite or link to this item:
|Title:||Chromosomal characteristics of a Brazilian whip spider (Amblypygi) and evolutionary relationships with other arachnid orders|
Araujo, Douglas de
Carvalho, Leonardo S.
Cella, Doralice Maria
Schneider, Marielle Cristina [UNIFESP]
Univ Estadual Paulista
Universidade Federal de Mato Grosso do Sul (UFMS)
Univ Fed Piaui
Universidade Federal de São Paulo (UNIFESP)
Sex chromosome system
|Citation:||Genetics and Molecular Research. Ribeirao Preto: Funpec-editora, v. 12, n. 3, p. 3726-3734, 2013.|
|Abstract:||We analyzed mitotic and meiotic cells of a Brazilian amblypygid, Heterophrynus longicornis, using conventional and molecular cytogenetic techniques (Giemsa staining, C-banding, Ag-NOR, and FISH with rDNA probe). This is the first study that focuses solely on amblypygid chromosomes; it was undertaken to add data on cytogenetic knowledge of this group and contribute to the understanding of chromosome evolution in the Arachnida. We found 2n = 66 for male and female individuals, monocentric chromosomes, and absence of morphologically differentiated sex chromosomes. C-banding showed heterochromatin in the pericentromeric region of most chromosomes. Mitotic and meiotic nuclei submitted to silver impregnation and FISH revealed, respectively, Ag-NORs and ribosomal genes in the terminal region of two chromosome pairs. Most chromosome features that we observed in H. longicornis are shared with species of other arachnid orders; however, the absence of morphologically differentiated sex chromosomes in amblypygid contrasts with the remarkable variety of sex chromosome systems recorded for the Araneae. Consequently, we conclude that analysis of species of the Tetrapulmonata clade is useful for understanding the trends of sex chromosome evolution in this arachnid group.|
|Appears in Collections:||Em verificação - Geral|
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.