Polymorphic organization of constitutive heterochromatin in Equus asinus (2n = 62) chromosome 1
Raimondi, Elena (Università di Pavia. Dipartimento di Genetica e Microbiologia Adriano Buzzati-Traverso)
Piras, Francesca M. (Università di Pavia. Dipartimento di Genetica e Microbiologia Adriano Buzzati-Traverso)
Nergadze, Solomon G. (Università di Pavia. Dipartimento di Genetica e Microbiologia Adriano Buzzati-Traverso)
Di Meo, Giulia Pia (Istituto per il Sistema Produzione Animale in Ambiente Mediterraneo (ISPAAM). Consiglio Nazionale delle Ricerche)
Ruiz-Herrera Moreno, Aurora (Universitat Autònoma de Barcelona. Departament de Biologia Cel·lular, de Fisiologia i d'Immunologia)
Ponsà i Fontanals, Montserrat (Universitat Autònoma de Barcelona. Departament de Biologia Cel·lular, de Fisiologia i d'Immunologia)
Ianuzzi, Leopoldo (Istituto per il Sistema Produzione Animale in Ambiente Mediterraneo (ISPAAM). Consiglio Nazionale delle Ricerche)
Giulotto, Elena (Università di Pavia. Dipartimento di Genetica e Microbiologia Adriano Buzzati-Traverso)
Universitat Autònoma de Barcelona. Institut de Biotecnologia i de Biomedicina "Vicent Villar Palasí"

Fecha:	2011
Resumen:	In the karyotype of Equus asinus (domestic donkey, 2n = 62), non-centromeric heterochromatic bands have been described in subcentromeric and telomeric positions. In particular, chromosome 1 is characterised by heterochromatic bands in the proximal region of the long arm and in the short arm; it has been shown that these regions are polymorphic in size. Here we investigated the variation in the intensity and distribution of fluorescence signals observed on donkey chromosome 1 after in situ hybridization with two DNA probes containing fragments from the two major equine satellite DNA families. Our results show that, in Equus asinus chromosome 1, the amount and distribution of large clusters of satellite DNA can define at least nine polymorphic variants of the constitutive heterochromatin that cannot be detected by C-banding alone.
Derechos:	Tots els drets reservats.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió publicada
Publicado en:	Hereditas, Vol. 148, Issue 3 (June 2011) , p. 110-113, ISSN 1601-5223

DOI: 10.1111/j.1601-5223.2011.02218.x

4 p, 294.3 KB

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