tailieunhanh - Báo cáo khoa học: "Morphological variability of oaks (Quercus robur L, Quercus petraea (Matt) Liebl, Quercus pubescens Willd) in northeastern France: preliminary results"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: Morphological variability of oaks (Quercus robur L, Quercus petraea (Matt) Liebl, Quercus pubescens Willd) in northeastern France: preliminary results. | Ann Sci For 1993 50 Suppl 1 35S-40S Elsevier INRA 35s Original article Morphological variability of oaks Quercus robur L Quercus petraea Matt Liebl Quercus pubescens Wil Id in northeastern France preliminary results JL Dupouey V Badeau Laboratoire de phytoécologie forestiere Centre de recherches forestieres INFIA Nancy 54280 Champenoux France Summary Morphological variability of oaks in Lorraine northeastern France was studied. Eight hundred oaks were sampled in 80 stands covering a broad range of ecological variability 10 leaves fruits and current-year shoots were collected per tree. Thirty-four morphological variables were measured and analyzed by factorial correspondance analysis. It is concluded that o robur and Q pe-traea are clearly separated with a few morphologically intermediate individuals . Q petraea is more variable than Q robur. Q pubescens and Q robur are totally isolated from each other while Q petraea and Q pubescens form a continuum. Many variables discriminate between these 3 species some of them have been little known prior to now pilosity presence of intercalary ribs . These results are compared with those from other parts of Europe. taxonomy I morphometries hybridization introgression Quercus robur Quercus petraea Quercuspubescens Resume Variabilité morphologique des chênes dans le Nord-Est de la France résultats préliminaires. Nous avons étudié la differentiation morphologique des chênes pédonculé sessile et pubescent dans le Nord-Est de la France. L echantillonnage a porté sur 80 populations provenant de stations représentant toute la gamme de variation des milieux de chênaies en Lorraine. Sur 10 arbres par population 10 feuilles infrutescences et rameaux de 1 année ont été variables morphologiques ont été mesurées et analysées par analyse factorielle des corres-pondances. On observe une très nette separation des chênes sessile et pédonculé avec seulement 3 5 d individus morphologiquement intermédiaires ainsi qu un

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