tailieunhanh - Báo cáo khoa học: "Differences of genetic variation based isozymes of primary and secondary metabolism in Quercus petraea"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: Differences of genetic variation based isozymes of primary and secondary metabolism in Quercus petraea. | Ann Sci For 1993 50 Suppl 1 245S-252S Elsevier INRA 245s Original article Differences of genetic variation based on isozymes of primary and secondary metabolism in Quercus petraea A Zanetto A Kremer T Labbé INRA laboratoire de génétique et d amelioration des arbres forestiers BP 45 33611 Gazinet Cedex France Summary The genetic variation among 18 populations of Q petraea was investigated by studying the variability of 6 enzyme-coding loci. The populations were distributed over the range of the species. Three of the enzymes studied are involved in the primary metabolism group I while the remaining 3 are part of the secondary metabolism group II . With respect to enzymes of group I populations from the western part of the range showed higher observed and expected heterozygosities than eastern and extreme southern populations. Differentiation among populations was low Gst values varied between 2 and 5 depending upon the locus investigated. Based upon enzymes of group I differentiation among populations of the central part of the range was of the same magnitude as that among populations of the total range for enzymes of group I. However levels of differentiation increased for enzymes of group II. allozyme heterozygosity I genetic differentiation Q petraea Resume Variabilité génétique des enzymes du métabolisme primaire et secondaire Chez le chêne sessile. La variabilité génétique de Quercus petraea a été étudiée sur un échantillon de 18 populations venant de ensemble de I aire naturelie. L analyse portait sur 6 locus correspondant à 6 enzymes dont 3 étaient impliquées dans le métabolisme primaire groupe I et les 3 autres dans le métabolisme secondaire groupe II . Les populations occidentales sont plus variables heterozygotie observée et théorique que les populations orientales OU de rextrémité méridionale de I aire de distribution. Ces résultats ne s appliquent qu aux enzymes du groupe I. La differentiation entre populations reste très faible les valeurs de Gst variant

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