TAILIEUCHUNG - Báo cáo sinh học: "Synaptonemal complex behaviour in a bull homozygous for the 1;29 Robertsonian translocation"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: Synaptonemal complex behaviour in a bull homozygous for the 1;29 Robertsonian translocation | Genet Sei Evol 1990 22 361-366 Elsevier INRA 361 Short note Synaptonemal complex behaviour in a bull homozygous for the 1 29 Robertsonian translocation A Bouvet EP Cribiu INRA Centre de Recherche de Jouy Laboratoire de Cytogénétique 78350 Jouy-en-Josas France Received 24 April 1990 accepted 13 June 1990 - Analysis of synaptonemal complexes from a bull homozygous carrier for the 1 29 Robertsonian translocation showed the presence of 28 autosomal bivalent figures including one with subtelocentrically located kinetochores. No association with the sex vesicle was detected. In the X Y bivalent a pairing segment existed between the extremity of the X and Y chromosomes throughout pachytene. A gap separating that complex from the rest of the Y chromosome was apparent regardless of the stain used. The results of this study confirm that there is no meiotic impairment when this homozygous translocation is present. cattle meiosis synaptonemal complexes Robertsonian translocation Résumé - Comportement des complexes synaptonématiques chez un taureau homozygote pour la translocation robertsonienne 1 29. L examen de complexes synap-tonématiqũes d un taureau homozygote pour la translocation robertsonienne 1 29 a révểlé la presence de 28 bivalents autosomiques dont 1 montrant des kinétochores en position subterminale. Aucune association avec la vésicule sexuelle n a été notée. Les exỉrémités des chromosomes X et Y sont restées appariées durant tout le stade pachytene. La sépara-tion entre ce complexe et 1 extrémité distale du chromosome Y a étề régũlièrement notée quel que soit le colorant employe. Les résultats de cette étude confirment que la presence de cette translocation robertsonienne à 1 état homozygote n a pas d effet négãtiỊsur la méiose. bovin complexe synaptonématique méiose translocation robertsonienne INTRODUCTION The analysis of synaptonemal complexes behaviour in pachytene cells has now been incorporated into the arsenal of methods used to investigate the impact on .

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