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Consensus mapping of major resistance genes and independent QTL for quantitative resistance to sunflower downy mildew.
Theor Appl Genet. 2012 Sep; 125(5):909-20.TA

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 mechanisms, a strategy that could help to improve durability of sunflower resistance to downy mildew.

Authors+Show Affiliations

Laboratoire des Interactions Plantes-Microorganismes (LIPM), INRA, UMR441, 31326 Castanet-Tolosan, France. patrick.vincourt@toulouse.inra.frNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22576236

Citation

Vincourt, Patrick, et al. "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, vol. 125, no. 5, 2012, pp. 909-20.
Vincourt P, As-Sadi F, Bordat A, et al. Consensus mapping of major resistance genes and independent QTL for quantitative resistance to sunflower downy mildew. Theor Appl Genet. 2012;125(5):909-20.
Vincourt, P., As-Sadi, F., Bordat, A., Langlade, N. B., Gouzy, J., Pouilly, N., Lippi, Y., Serre, F., Godiard, L., Tourvieille de Labrouhe, D., & Vear, F. (2012). 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, 125(5), 909-20. https://doi.org/10.1007/s00122-012-1882-y
Vincourt P, et al. Consensus Mapping of Major Resistance Genes and Independent QTL for Quantitative Resistance to Sunflower Downy Mildew. Theor Appl Genet. 2012;125(5):909-20. PubMed PMID: 22576236.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Consensus mapping of major resistance genes and independent QTL for quantitative resistance to sunflower downy mildew. AU - Vincourt,Patrick, AU - As-Sadi,Falah, AU - Bordat,Amandine, AU - Langlade,Nicolas B, AU - Gouzy,Jerome, AU - Pouilly,Nicolas, AU - Lippi,Yannick, AU - Serre,Frédéric, AU - Godiard,Laurence, AU - Tourvieille de Labrouhe,Denis, AU - Vear,Felicity, Y1 - 2012/05/11/ PY - 2012/02/21/received PY - 2012/04/19/accepted PY - 2012/5/12/entrez PY - 2012/5/12/pubmed PY - 2012/12/21/medline SP - 909 EP - 20 JF - TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik JO - Theor. Appl. Genet. VL - 125 IS - 5 N2 - 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 mechanisms, a strategy that could help to improve durability of sunflower resistance to downy mildew. SN - 1432-2242 UR - https://www.unboundmedicine.com/medline/citation/22576236/Consensus_mapping_of_major_resistance_genes_and_independent_QTL_for_quantitative_resistance_to_sunflower_downy_mildew_ L2 - https://dx.doi.org/10.1007/s00122-012-1882-y DB - PRIME DP - Unbound Medicine ER -