synaptonemal complex behaviour in a bull homozygous for the 1;29 robertsonian translocationsynaptonemal复杂行为的公牛纯合1;29罗伯逊的易位.pdfVIP
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synaptonemal complex behaviour in a bull homozygous for the 1;29 robertsonian translocationsynaptonemal复杂行为的公牛纯合1;29罗伯逊的易位
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) Summary - 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 mdash; 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 ho- mozygote pour la translocation robertsonienne 1;29. L’examen de complexes synap- tonématiques d’un taureau homozygote pour la translocation robertsonienne 1;29 a révélé la de 1 kinétochores en présence 28 bivalents autosomiques dont montrant des position subterminale. Aucune association avec la vésicule sexuelle n’a été notée. Les extrémités des chromosomes X et Y sont restées appariées durant tout le stade pachytène. La sépara- tion entre ce complexe et l’extrémité distale du chromosome Y a été régulièrement notée, quel que soit le colorant employé. Les résultats de cette étude confirment que la présence de cette
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