Spermatogenesis and nucleolar activity in Triatoma klugi (Triatomine, Heteroptera)
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
01/01/2008
|
Resumo |
Triatoma klugi is a Chagas disease vector in the Rio Grande do Sul State. Triatominae chromosomes are holocentric and sex chromosomes segregation is post-reductional. In this paper we describe the karyotype of male T. klugi and a meiotic analysis including the nucleolar behavior during spermatogenesis. Testis cells were analyzed after lacto-acetic orcein and silver nitrate staining. Two autosomes and the heterochromosomes presented nucleolar activity (Ag-NORs) during diplotene-diakinesis. The analysis of metaphase I and II revealed a karyotype with 2n = 20+XY. In metaphase I a prominent nucleolar mass was observed in the cell periphery and small silver grains were detected in metaphase II. During anaphase, the chromosomes segregated in parallel and a typical holocentric late migration behavior was observed. The restoration of the nucleolus was an important feature in this phase. During telophase nucleolar masses persisted and in early spermiogenesis the spermatids presented a small peripheral mass until elongation. The present study is a contribution to the study of chromatin behavior and nucleolar persistence in meiosis. |
Formato |
438-444 |
Identificador |
http://dx.doi.org/10.1590/S1415-47572008000300008 Genetics and Molecular Biology. Ribeirao Pret: Soc Brasil Genetica, v. 31, n. 2, p. 438-444, 2008. 1415-4757 http://hdl.handle.net/11449/21510 S1415-47572008000300008 WOS:000256957500008 S1415-47572008000300008.pdf |
Idioma(s) |
eng |
Publicador |
Soc Brasil Genetica |
Relação |
Genetics and Molecular Biology |
Direitos |
openAccess |
Palavras-Chave | #Triatoma klugi #Triatomine #Cytogenetic #Nucleolus #Karyotype #Meiosis |
Tipo |
info:eu-repo/semantics/article |