Morphological Variability of Oaks (Quercus robur L, Quercus petraea (Matt) Liebl, Quercus pubescens Willd) in Northeastern France/ Preliminary Results : Genetics of Oaks. IUFRO Proceedings

1993

Unselbständiges Werk

2819

200041522

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 Quercus robur and Quercus petraea are clearly separated with a few morphologically intermediate individuals (3.5%). Quercus petraea is more variable than Quercus robur. Quercus pubescens and Quercus robur are totally isolated from each other, while Quercus petraea and Quercus 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.