TAILIEUCHUNG - Báo cáo lâm nghiệp: "Genetic variation of Prunus avium in susceptibility to cherry leaf spot (Blumeriella jaapii) in spatially heterogeneous infected seed orchards"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài: Genetic variation of Prunus avium in susceptibility to cherry leaf spot (Blumeriella jaapii) in spatially heterogeneous infected seed orchards. | Ann. For. Sci. 64 2007 21-30 INRA EDP Sciences 2007 DOI forest 2006084 21 Original article Genetic variation of Prunus avium in susceptibility to cherry leaf spot Blumeriella jaapii in spatially heterogeneous infected seed orchards Raquel DÍAZ Rafael Zas Josefa Fernandez-LoPEZ Departamento de Production Forestal Centro de Investigations Ambientais de Lourizan Apdo. 127 Pontevedra 36080 Spain Received 9 November 2005 accepted 27 June 2006 Abstract - Cherry leaf spot Blumeriella jaapii Rehm Arx. is a very serious disease of wild cherry Prunus avium L. which produces premature leaf defoliation and vigor decrease. In two clonal seed orchards of P avium naturally infected by B. jaapii spatial heterogeneity and autocorrelation of neighbor damage caused by cherry leaf spot impeded proper analysis of the fungus incidence. The iterative spatial analysis ISA based on variography and kriging was successfully used to eliminate the effect of this spatial heterogeneity in analysis of genetic variation in susceptibility to B. jaapii. Significant differences among P avium clones were found with moderate to high broad-sense heritability estimates. Genetic by environment interactions although significant were not quantitatively important. A strong relationship between leaf spot susceptibility and bud burst was found. However other factors must be affecting the genetic variation in leaf spot susceptibility as differences among clones remained highly significant when considering the bud burst as a covariate in the genetic model. wild cherry genetic resistance bud burst broad-sense heritability spatial distribution Résumé - Variabilité génétique de la susceptibilité de Prunus avium à Blumeriella jaapii dans des vergers à graines infectes spatialement de manière hétérogène. Blumeriella jaapii Rehm Arx. est une des causes principales du dépérissement du merisier Prunus avium L. il produit une défoliation prématurée et réduit la vigueur des arbres. Dans deux vergers à graines de .

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