Genetic variation of the riparian pioneer tree species populus nigra. II. Variation In susceptibility to the foliar rust melampsora larici-populina
Identifieur interne : 000103 ( Main/Exploration ); précédent : 000102; suivant : 000104Genetic variation of the riparian pioneer tree species populus nigra. II. Variation In susceptibility to the foliar rust melampsora larici-populina
Auteurs : Legionnet [France] ; Muranty ; LefevreSource :
- Heredity [ 1365-2540 ] ; 1999.
Abstract
Partial resistance of Populus nigra L. to three races of the foliar rust Melampsora larici-populina Kleb. was studied in a field trial and in laboratory tests, using a collection of P. nigra originating from different places throughout France. No total resistance was found. The partial resistance was split into epidemiological components, which proved to be under genetic control. Various patterns of association of epidemiological components values were found. Principal components analysis revealed their relationships. Only 24% of the variance of the field susceptibility could be explained by the variation of the epidemiological components of susceptibility. This variable was significantly correlated with susceptibility to the most ancient and widespread race of the pathogen, and with the variables related to the size of the lesions of the different races. Analysis of variance showed significant differences in susceptibility between regions and between stands within one region. Up to 20% of variation was between regions, and up to 22% between stands, so that these genetic factors appeared to be more differentiated than the neutral diversity (up to 3.5% Legionnet & Lefevre, 1996). However, no clear pattern of geographical distribution of diversity was detected.
DOI: 10.1038/sj.hdy.6884880
PubMed: 10336707
Affiliations:
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Variation In susceptibility to the foliar rust melampsora larici-populina </title><author><name sortKey="Legionnet" sort="Legionnet" uniqKey="Legionnet" last="Legionnet">Legionnet</name><affiliation wicri:level="3"><nlm:affiliation>INRA, Station d'Amelioration des Arbres Forestiers, 45160 Ardon, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>INRA, Station d'Amelioration des Arbres Forestiers, 45160 Ardon</wicri:regionArea><placeName><region type="region" nuts="2">Centre-Val de Loire</region><region type="old region" nuts="2">Région Centre</region><settlement type="city">Ardon</settlement></placeName></affiliation></author><author><name sortKey="Muranty" sort="Muranty" uniqKey="Muranty" last="Muranty">Muranty</name></author><author><name sortKey="Lefevre" sort="Lefevre" uniqKey="Lefevre" last="Lefevre">Lefevre</name></author></analytic><series><title level="j">Heredity</title><idno type="eISSN">1365-2540</idno><imprint><date when="1999" type="published">1999</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Partial resistance of Populus nigra L. to three races of the foliar rust Melampsora larici-populina Kleb. was studied in a field trial and in laboratory tests, using a collection of P. nigra originating from different places throughout France. No total resistance was found. The partial resistance was split into epidemiological components, which proved to be under genetic control. Various patterns of association of epidemiological components values were found. Principal components analysis revealed their relationships. Only 24% of the variance of the field susceptibility could be explained by the variation of the epidemiological components of susceptibility. This variable was significantly correlated with susceptibility to the most ancient and widespread race of the pathogen, and with the variables related to the size of the lesions of the different races. Analysis of variance showed significant differences in susceptibility between regions and between stands within one region. Up to 20% of variation was between regions, and up to 22% between stands, so that these genetic factors appeared to be more differentiated than the neutral diversity (up to 3.5% Legionnet & Lefevre, 1996). 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This variable was significantly correlated with susceptibility to the most ancient and widespread race of the pathogen, and with the variables related to the size of the lesions of the different races. Analysis of variance showed significant differences in susceptibility between regions and between stands within one region. Up to 20% of variation was between regions, and up to 22% between stands, so that these genetic factors appeared to be more differentiated than the neutral diversity (up to 3.5% Legionnet & Lefevre, 1996). 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