caa a22 4500 475794095 CHVBK 20180406123718.0 cr unu---uuuuu 170329e20001001xx s 000 0 eng 10.1007/s001220051557 doi (NATIONALLICENCE)springer-10.1007/s001220051557 Mapping of one major gene and of QTLs involved in resistance to clubroot in Brassica napus [Elektronische Daten] [M. J. Manzanares-Dauleux, R. Delourme, F. Baron, G. Thomas] Abstract : Clubroot, caused by Plasmodiophora brassicae, is a damaging disease of Brassica napus. Genetic control and mapping of loci involved in high and partial quantitative resistance expressed against two single spore isolates (Pb137-522 and K92-16) were studied in the F1 and DH progenies of the cross Darmor-bzh (resistant) x Yudal (susceptible). The high level of resistance expressed by Darmor-bzh to isolate Pb137-522 was found to be mainly due to a major gene, which we have named Pb-Bn1, located on linkage group (LG) DY4. Partial quantitative resistance showed by Darmor-bzh to the K92-16 isolate arose from the association of at least two additive QTLs detected on LGs DY4 and DY15; the QTL on DY4, explaining 19% of the variance, was mapped at the same position as the major gene Pb-Bn1. Epistatic interactions between nine regions with or without additive effects were detected. The total phenotypic variation accounted for by additive and epistatic QTLs ranged from 62% to 81% depending on the isolate. For one isolate, the relative effect due to additivity was similar to that due to epistasis. Springer-Verlag Berlin Heidelberg, 2000 Key words Brassica napus nationallicence Epistasis nationallicence Molecular markers nationallicence Plasmodiophora brassicae nationallicence Quantitative trait loci (QTL) nationallicence Manzanares-Dauleux M. J. INRA Station d'Amélioration des Plantes, BP 35327, 35653 Le Rheu Cedex, France e-mail: manzanar@rennes.inra.fr Fax: +33-2-23-48-51-20, FR aut Delourme R. INRA Station d'Amélioration des Plantes, BP 35327, 35653 Le Rheu Cedex, France e-mail: manzanar@rennes.inra.fr Fax: +33-2-23-48-51-20, FR aut Baron F. INRA Station d'Amélioration des Plantes, BP 35327, 35653 Le Rheu Cedex, France e-mail: manzanar@rennes.inra.fr Fax: +33-2-23-48-51-20, FR aut Thomas G. INRA Station d'Amélioration des Plantes, BP 35327, 35653 Le Rheu Cedex, France e-mail: manzanar@rennes.inra.fr Fax: +33-2-23-48-51-20, FR aut https://doi.org/10.1007/s001220051557 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s001220051557 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Manzanares-Dauleux M. J. INRA Station d'Amélioration des Plantes, BP 35327, 35653 Le Rheu Cedex, France e-mail: manzanar@rennes.inra.fr Fax: +33-2-23-48-51-20, FR aut NATIONALLICENCE 700 1- Delourme R. INRA Station d'Amélioration des Plantes, BP 35327, 35653 Le Rheu Cedex, France e-mail: manzanar@rennes.inra.fr Fax: +33-2-23-48-51-20, FR aut NATIONALLICENCE 700 1- Baron F. INRA Station d'Amélioration des Plantes, BP 35327, 35653 Le Rheu Cedex, France e-mail: manzanar@rennes.inra.fr Fax: +33-2-23-48-51-20, FR aut NATIONALLICENCE 700 1- Thomas G. INRA Station d'Amélioration des Plantes, BP 35327, 35653 Le Rheu Cedex, France e-mail: manzanar@rennes.inra.fr Fax: +33-2-23-48-51-20, FR aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer