TAILIEUCHUNG - Báo cáo khoa học: " A test of half-sib progenies of greyish oak, Quercus pedunculiflora K Koch"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: A test of half-sib progenies of greyish oak, Quercus pedunculiflora K Koch. | 439s Ann Sci For 1993 50 Suppl 1 439s-443s Elsevier INRA Note A test of half-sib progenies of greyish oak Quercus pedunculiflora K Koch V Enescu Forest Research and Management Institute Bucharest SOS Stefanesti 128 72904 Romania Summary Results of an open pollinated progeny test of Quercus pedunculiflora are presented. The experimental design was Youden square with 9 replicates. The material comprised 23 open-pollinated progenies coming from a clonal seed orchard and 2 controls 1 bulk collection from a superior population and 2 bulk collection of an average stand. After 14 years important differences between controls and tested families were observed. All families except 1 showed superiority for stem straightness to the controls. The data supported the effectiveness of selection for stem straightness. Quercus pedunculiflora I open-pollinated progeny I clonal seed orchard plus tree Resume Un test de descendances de Quercus pedunculiflora K Koch. Cet article rend compte d un test de descendances issues de pollinisation libre de Quercus pedunculiflora. Le dispo-sltif experimental était constitué de carrés de Youden avec 9 repetitions. Le materiel vegetal com-prenait 23 descendances issues d un verger à graines de clones et de 2 lots témoins 1 un lot de graines récolté en vrac dans un peuplement phénotypiquement supérieur et 2 un lot récolté en vrac dans un peuplement moyen. Après 14 ans des differences importantes ont été observées entre les descendances et les lots témoins. Toutes les families à I exception d une montrent une meilleure rectitude du tronc que les témoins. Les données montrent I efficacite de la selection d arbres plus pour la rectitude du tronc. Quercus pedunculiflora descendance issue de pollinisation libre verger à graines de clones arbre plus INTRODUCTION In Romania many species of Quercus with very strong polymorphism grow naturally. They are identified as various subspecies varieties interspecific hybrids and introgressants Savulescu 1952 . Of .

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