| Registro completo |
| Provedor de dados: |
Genet. Mol. Biol.
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| País: |
Brazil
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| Título: |
Chromosomal localization of the 18S-28S and 5S rRNA genes and (TTAGGG)n sequences of butterfly lizards (Leiolepis belliana belliana and Leiolepis boehmei, Agamidae, Squamata)
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| Autores: |
Srikulnath,Kornsorn
Uno,Yoshinobu
Matsubara,Kazumi
Thongpan,Amara
Suputtitada,Saowanee
Apisitwanich,Somsak
Nishida,Chizuko
Matsuda,Yoichi
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| Data: |
2011-01-01
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| Ano: |
2011
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| Palavras-chave: |
Chromosomal mapping
FISH
Interstitial telomeric site
Leiolepidinae
Ribosomal RNA gene
Telomeric sequence
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| Resumo: |
Chromosomal mapping of the butterfly lizards Leiolepis belliana belliana and L. boehmei was done using the 18S-28S and 5S rRNA genes and telomeric (TTAGGG)n sequences. The karyotype of L. b. belliana was 2n = 36, whereas that of L. boehmei was 2n = 34. The 18S-28S rRNA genes were located at the secondary constriction of the long arm of chromosome 1, while the 5S rRNA genes were found in the pericentromeric region of chromosome 6 in both species. Hybridization signals for the (TTAGGG)n sequence were observed at the telomeric ends of all chromosomes, as well as interstitially at the same position as the 18S-28S rRNA genes in L. boehmei. This finding suggests that in L. boehmei telomere-to-telomere fusion probably occurred between chromosome 1 and a microchromosome where the 18S-28S rRNA genes were located or, alternatively, at the secondary constriction of chromosome 1. The absence of telomeric sequence signals in chromosome 1 of L. b. belliana suggested that its chromosomes may have only a few copies of the (TTAGGG)n sequence or that there may have been a gradual loss of the repeat sequences during chromosomal evolution.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000400009
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| Editor: |
Sociedade Brasileira de Genética
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| Relação: |
10.1590/S1415-47572011005000042
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| Formato: |
text/html
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| Fonte: |
Genetics and Molecular Biology v.34 n.4 2011
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| Direitos: |
info:eu-repo/semantics/openAccess
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