tailieunhanh - Báo cáo lâm nghiệp: "Genetic variation of Pinus pinaster Ait. seedlings in susceptibility to the pine weevil Hylobius abietis L."

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài:"Genetic variation of Pinus pinaster Ait. seedlings in susceptibility to the pine weevil Hylobius abietis L." | Ann. For. Sci. 62 2005 681-688 INRA EDP Sciences 2005 DOI forest 2005064 681 Original article Genetic variation of Pinus pinaster Ait. seedlings in susceptibility to the pine weevil Hylobius abietis L. Rafael ZASa Luis SAMPEDROb Eva PRADAa Josefa FERNÁNDEZ-LÓPEZa a Departamento de Producción Forestal Centro de Investigacións Forestais e Ambientais de Lourizán Apdo. 127 Pontevedra 36080 Spain b Departamento de Ecoloxía Centro de Investigacións Forestais e Ambientais de Lourizán Apdo. 127 Pontevedra 36080 Spain Received 30 September 2004 accepted 1 April 2005 Abstract - Damage by the pine weevil Hylobius abietis L. Coleoptera Curculionidae on Pinus pinaster Ait. was evaluated in a fertilization X progeny test in Galicia NW Spain to determine the genetic variation among families and the possibility to include the resistance to this insect as a selection criteria in the Galician maritime pine breeding program. Several damage and symptoms traits were evaluated. All these traits showed highly significant family effects and were strongly correlated among each other. Individual and family heritability estimates of the wound evaluations in the seedling stems were around and respectively. Strong genetic correlations among wounds and the average seedling color indicated that this last simple and subjective trait can be used for screening for pine weevil susceptibility. A positive genetic correlation was also observed between diameter growth and pine weevil damage. Faster growing families were more attacked hindering the possibility to include the susceptibility to the insect in the breeding program. Pinus pinaster Hylobius abietis genetic parameter genetic resistance pest management Résumé - Variation génétique de la susceptibilité des jeunes plants de pin maritime à Hylobius abietis L. Les dommages provoqués par Hylobius abietis L. Coleoptera Curculionidae au pin maritime Pinus pinaster Ait. ont été évalués sur un test génétique de descendances maternelles .