Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Cytogenetic observations on a Robertsonian translocation in Saanen goats | Génét. Sél. Evol. 1987 19 4 391-398 Cytogenetic observations on a Robertsonian translocation in Saanen goats 1 I. BURGUETE D. DI BERARDINO . LIOI L. TAIBI and D. MATASSINO Departamento de Genetica y Mejora Facultad de Veterinaria Università di Leon Leon Espana Istituto di Produzione Animate Facolta di Agraria Università di Napoli 80055 Portici Napoli Italy Istituto Sperimentale per la Zootecnia di Roma Sezione Periferica Operativa di Foggia 71020 Segezia Foggia Italy Summary A Robertsonian translocation of submetacentric type was detected in a herd of 15 goats of the Saanen breed reared on a farm located in southern Italy. Four males out of 5 and 2 females out of 10 were found to be carriers of the same translocation in the heterozygous state. All carriers were phenotypically normal. The RBA banding pattern demonstrated that the centric fusion took place between chromosomes 6 and 15 of the RBA-banded karyotype recently proposed as standard for the species Capra hircus L. The C-banding pattern showed the presence of 2 blocks of constitutive heterochromatin corresponding to the centromeres of the 2 chromosomes involved in the fusion. Silver staining revealed telomeric nucleolus organizer regions on the long arm of the two-armed chromosome. Key words Robertsonian translocation goat chromosomes. Résumé Etude cytogénétique d une fusion centrique chez la chèvre Saanen Une translocation robertsonienne submétacentrique a été détectée dans un troupeau de chèvres Capra hircus L. de race Saanen élevé en Italie méridionale. Quatre males sur 5 et 2 femelies sur 10 ont été trouvés porteurs de la même anomalie à 1 état heterozygote. Tous les porteurs avaient un phenotype normal. La technique des bandes RBA a permis de montrer que les chromosomes impliqués dans la translocation sont les chromosomes n 6 et n 15 du caryotype à bandes R recemment propose comme standard de la chèvre. La technique des bandes c a permis d observer dans le chromosome fusionne la presence des 2 blocs d
