TAILIEUCHUNG - Báo cáo sinh học: "Robertsonian translocation in Holstein-Friesian cattle A Ducos"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: Robertsonian translocation in Holstein-Friesian cattle A Ducos | 523 Genet Sei Evol 1997 29 523-526 Elsevier Inra Note A new Robertsonian translocation in Holstein Friesian cattle A Pinton1 A Ducos1 HM Berland1 A Séguéla1 MF Blanc1 A Darré2 s Mimar1 R. Darré 1 1 Unite de recherches associée ENVT-Inra de cytogénétique des populations animates 23 chemin des Capelles 31076 Toulouse cedex 3 2 Service de zootechnie Enfa BP 87 31326 Castanet-Tolosan cedex France Received 2 December 1996 accepted 21 April 1997 Summary - A new Robertsonian translocation was found in a cow of the Holstein-Friesian breed. GTG-banding allowed US to elucidate the anomaly as a centric fusion between chromosomes 19 and 21. CBG-banding demonstrated that the translocated chromosome was dicentric. Cytogenetic investigation of the relatives of the translocated animal revealed two other carriers. cattle Holstein Friesian chromosome Robertsonian translocation Resume Une nouvelle translocation robertsonienne dans la race Prim Holstein. Une nouvelle translocation robertsonienne a été mise en evidence chez une vache de race Holstein. La coloration en bandes GTG nous a permis d identifier les chromosomes impliqués dans la translocation. Il s agit des chromosomes 19 et 21. La coloration en bandes CBG montre que le chromosome transloqué est dicentrique. Une analyse cytogénétique des apparentés de I animal porteur a permis de mettre en evidence deux autres animaux porteurs. bovin Holstein chromosome translocation robertsonienne INTRODUCTION The first Robertsonian translocation described in cattle was the 1 29 translocation resulting from a centric fusion between chromosomes 1 and 29 with a single heterochromatic block Gustavsson and Rockborn 1964 . Since that date this anomaly has often been reported and occurs in many dairy and beef cattle breeds Long 1985 . However the 1 29 translocation has never been reported in the Holstein-Friesian breed. Up to now only four types of Robertsonian translocations have been identified in the Holstein-Friesian breed rob 13 21 Kovacs et

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