Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: Results of species hybridization with Quercus robur L and Quercus petraea (Matt) Liebl. | Ann Sci For 1993 50 Suppl 1 137s-143s Elsevier INRA 137s Original article Results of species hybridization with Quercus robur L and Quercus petraea Matt Liebl s steinhoff Lower Saxony Forest Tree Breeding Department ForstamtstraBe 6 W- 3513 Escherode Germany Summary Quercus robur and Quercus petraea can be crossbred. The hybridization rate is affected by the fact that Q robur is more easy fertilized with o petraea pollen than vice versa and the fact that individual incompatibilities hinder pollination. The fertilization rate of intraspecific crosses was about with a pollen mixture and with single-tree pollen for Q roburand pollen mixture and single-tree pollen for Q petraea. Interspecific crosses had fertilization rates of pollen mixture and single-tree pollen for Q robur and pollen mixture and single-tree pollen for Q petraea. After selecting clones that readily accepted pollen from the other species the fertilization rate increased greatly especially for the combination Q petraea X Q robur single-tree pollen . Dried pollen can be stored at -18 C. Ouercus robur L Quercus petraea Matt Liebl hybridization cross breeding Resume Résultats des hybridations contrôlées entre Ouercus robur L et Quercus petraea Matt Liebl. Quercus robur et Quercus petraea sont des espèces compatibles. Cependantle crolse-ment de Q robur avec du pollen de Q petraea est plus facile que le croisement inverse d autre part le taux d hybridation depend aussi des phénomènes d incompatibilite au niveau individuel. Le taux d hybridation dans les croisements intraspecifiques est de 21 6 melange pollinique et de 12 6 pollen d arbres individuels pourQ robur. Ces chiffres sont respectivement 13 7 et 17 6 pourQ petraea. Les mêmes taux au niveau des croisements interspecifiques sont de 6 5 melange pollini-que et 11 5 pollen d arbres individuels Chez Q robur ef 9 2 melange pollinique et 1 8 pollen d arbres Individuels Chez Q petraea. Ces chlffres augmentent très .
