| Texto completo | |
| Autor(es): |
Schneider, Marielle Cristina
[1]
;
Zacaro, Adilson Ariza
[2]
;
Ferreira, Amilton
[3]
;
Cella, Doralice Maria
[3]
Número total de Autores: 4
|
| Afiliação do(s) autor(es): | [1] Univ Fed Sao Paulo, Dept Ciencias Biol, Sao Paulo - Brazil
[2] Univ Fed Vicosa, Dept Biol Geral, Vicosa, MG - Brazil
[3] Univ Estadual Paulista, Dept Biol, Inst Biociencias, Sao Paulo - Brazil
Número total de Afiliações: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF INSECT SCIENCE; v. 10, JUL 2 2010. |
| Citações Web of Science: | 1 |
| Resumo | |
Within the Orthopteran species, those of the suborder Ensifera have been rarely studied from the cytogenetic point of view, mainly due to the difficulties for taxonomic identification of its species. The Gryllidae is the second largest family of this suborder and possesses some genera, such as Anurogryllus, that occur only on the American continents. The aim of this work was to determine the karyotype characteristics, the meiotic chromosome behaviour, and the nucleolar organizer region (NOR) pattern of Anurogryllus sp (Orthoptera: Gryllidae). In the analyzed sample, high levels of numerical, morphological, and NORs polymorphisms were detected. Within five distinct karyotypes that were found, the basic karyotype of Anurogryllus sp. showed 2n(male) = 22 + X0 with acrocentric autosomes and a metacentric X sex chromosome; furthermore, a conspicuous secondary constriction related to the NOR was present along the entire short arm on pair 5. The other four types of karyotypes arose from centric fusions between elements of pairs 1/3, 2/6, 4/7 and a NOR partial translocation from pair 5 onto the long arm terminal region of one element of the fused pair 2/6. Such intraspecific variability and the consequences of high levels of polymorphism are discussed, leading to conjectures about the mechanisms that led to these chromosome rearrangements. (AU) | |
| Processo FAPESP: | 06/53275-3 - Diferenciação evolutiva entre os cromossomos holocêntricos e monocêntricos em algumas espécies de escorpiões da fauna brasileira, detectada pela análise ultraestrutural do complexo sinaptonêmico e regiões associadas, heterocromatina constitutiva e região organizadora de nucléolo |
| Beneficiário: | Marielle Cristina Schneider |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |