Consensus mapping of major resistance genes and independent QTL for quantitative resistance to sunflower downy mildew.

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik
Patrick VincourtFelicity Vear

Abstract

Major gene resistance to sunflower downy mildew (Plasmopara halstedii) races 304 and 314 was found to segregate independently from the resistance to races 334, 307 and 304 determined by the gene Pl2, already positioned on Linkage Group (LG) 8 of sunflower molecular maps. Using a consensus SSR-SNP map constructed from the INEDI RIL population and a new RIL population FU × PAZ2, the positions of Pl2 and Pl5 were confirmed and the new gene, denoted Pl21, was mapped on LG13, at 8 cM from Pl5. The two RIL populations were observed for their quantitative resistance to downy mildew in the field and both indicated the existence of a QTL on LG8 at 20-40 cM from the major resistance gene cluster. In addition, for the INEDI population, a strong QTL on LG10, reported previously, was confirmed and a third QTL was mapped on LG7. A growth chamber test methodology, significantly correlated with field results, also revealed the major QTL on LG10, explaining 65 % of variability. This QTL mapped in the same area as a gene involved in stomatal opening and root growth, which may be suggested as a possible candidate to explain the control of this character. These results indicate that it should be possible to combine major genes and other resistance...Continue Reading

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Citations

Jul 25, 2012·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Othmane MerahPatrick Vincourt
Feb 26, 2013·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Elena CadicPatrick Vincourt
May 31, 2013·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·L GongL L Qi
Dec 6, 2014·Molecular Plant Pathology·Quentin GascuelLaurence Godiard
Feb 13, 2015·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·L L QiT J Gulya
Feb 2, 2018·Frontiers in Plant Science·Aleksandra Dimitrijevic, Renate Horn
Mar 4, 2017·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Brigitte ManginStéphane Muños
Dec 20, 2018·Frontiers in Plant Science·Yann PecrixLaurence Godiard
Sep 22, 2020·Plant Disease·Michelle A GilleySamuel G Markell
Dec 20, 2020·International Journal of Molecular Sciences·Guojia MaLili Qi

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