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Cytogenetic analysis gtg cbg and nor bands of a wild boar population sus scrofa scrofa with chromosomal polymorphism in the south east of spain



Cytogenetic analysis gtg cbg and nor bands of a wild boar population sus scrofa scrofa with chromosomal polymorphism in the south east of spain



Genetics Selection Evolution 22(1): 1-10



The karyotypes of 12 wild boars (4 .male., 8 .female.) from populations in Sierra Nevada and Sierra de Baza (Almeria) were analysed. Chromosomal polymorphism giving rise to 3 variants in the diploid number [2n = 38 (1.male.), 2n = 37 (2 .male., 1 .female.) and 2n = 36 (1 .male., 7 .female.)] was observed. By means of GTC-band analysis, this polymorphism proved to be the consequence of a Robertsonian translocation between members of pairs 15 and 17 of karyotypes with 2n = 38, thereby creating a long submetacentric chromosome (15/17) together with 2 free acrocentric chromosomes, (15 and 17) in individuals with 2n = 27, and a pair of long submetacentric chromosomes (15.17) in 2n = 36 specimens. CBG-band analysis revealed 2 types of staining for heterochromatin: a dark staining, characteristic of acrocentric chromosomes and occasionally present in the submetacentric (15/17), and a pale staining, characteristic of the rest of the submetacentric chromosomes. The Y-chromosome presented dark heterochromatin over the entire length of its long arm. The nucleolus organizers were observed on pairs 8 and 10 and showed heteromorphism of the size of the silver block and in the distribution in both pairs.

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Accession: 007174238

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DOI: 10.1186/1297-9686-22-1-1


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