TAILIEUCHUNG - Báo cáo khoa học: "Oak tree improvement MV in Indiana'

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: Oak tree improvement MV in Indiana. | 416s Ann Sci For 1993 50 Suppl 1 416s-419s Elsevier INRA Original article Oak tree improvement in Indiana MV Coggeshall Indiana Department of Natural Resources Vallonia State Nursery Vallonia IN 47281 USA Summary Oak tree improvement in the state of Indiana is currently in progress for 4 species Ouercus rubra L Q alba Q falcata var pagodifolia Ell and Q robur L. These applied programs were initiated in response to the increased demand for high quality reforestation stock within the state. The Q rubra breeding program employs sublining and progeny testing by means of softwood cuttings derived from open-pollinated seeds. Limited range provenance progeny tests have been established for Q alba at 4 locations in the state of which 2 plantings are designated to serve as seedling seed orchards in the future. The feasibility of using exotic sources of Q falcata var pagodifo-lia and Q robur is currently under investigation. vegetative propagation flowering I provenance testing Resume Programmes d amelioration des chênes dans rÉtat d Indiana. Des programmes d amelioration génétique sont actuellement menés pour 4 espèces de chêne dans I Etat de Indiana Quercus rubra Q alba Q falcata var pagodifolia et Q robur. Ces programmes ont été mis en route suite à la demande importante de plantations d especes produisant du bois de qualité. Le programme relatif à Q rubra est base sur plusieurs lignées sublining et des tests de descendances mis en place sous forme de boutures et issus de croisements libres. Des plantations de provenances et descendances de Q alba ont été mises en place dans 4 stations les provenances ne sont issues que d une partie de I aire de distribution. Deux plantations ont été conọues de manière à être transformees en vergers à graines de semis. L utilisation effective des espèces exotiques Q falcata var pagodifolia etQ roburj depend pour instant des résultats des plantations. multiplication vegetative floraison tests de provenance Oak improvement in Indiana 417s .

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