tailieunhanh - Báo cáo lâm nghiệp: " Mating system parameters in a natural population of Abies borisii regis Mattfeld"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế, đề tài: " Mating system parameters in a natural population of Abies borisii regis Mattfeld. | Ann Sci For 1997 54 643-647 Elsevier Inra 643 Note Mating system parameters in a natural population of Abies borisii regis Mattfeld B Fady1 RD Westfall2 Unite experimentale d amelioration des arbres forestiers méditerranéens Inra domaine du Ruscas 4935 route du Dorn 83230 Bormes-Les-Mimosas France 2 Pacific Southwest Research Station Institute of Forest Genetics USDA Forest Service PO Box 245 Berkeley CA 94701 USA Received 29 July 1996 accepted 12 May 1997 Summary - Isozymes were used to estimate mating system parameters of one natural Abies borisii regis population from the Pertouli forest Thessaly Greece. Starch gel electrophoresis was performed and 17 trees were genotyped for seven variable loci using open-pollinated seeds. Under the mixed mating model selfing rate was significantly different from zero although outcrossing accounted for 94 of all zygotes formed. The parental fixation index was significantly lower than zero indicating heterozygote excess. A limited number of parents was shown to participate in the matings. Abies borisii regis I allozyme outcrossing I inbreeding hybridization Resume Regime de reproduction d une population naturelie d Abies borisii regis Mattfeld. Les isoenzymes ont été utilises pour estimer les paramètres du regime de reproduction d une population naturelie d Abies borisii regis issue de la foret de Pertouli region de Thessalie en Grèce. Les descendances issues de fecondation libre d un sous-échantillon de 17 arbres parmi les 30 récoltés ont été analysées par électrophorèse horizontale sur gel d amidon selon la methode classique du mixed mating model . Sur un total de 14 loci neuf systèmes enzymatiques révélés sept loci polymorphes ont été utilises dans cette étude. Le taux d autofecondation est apparu significativement different de zero bien que 94 des zygotes formes étaient issus d allofecondation. L index de fixation parental était significativement negatif indiquant un excès d heterozygotes dans la population. Un nombre limité