Data from: Quantitative trait loci from the host genetic background modulate the durability of a resistance gene: a rational basis for sustainable resistance breeding in plants
Palloix, Alain, Genetics and Improvement of Fruit and Vegetables
Quenouille, Julie, Genetics and Improvement of Fruit and Vegetables
Paulhiac, Estelle, Genetics and Improvement of Fruit and Vegetables
Moury, Benoit, INRA, UR407 Pathologie Végétale, Montfavet Cedex, France
Published Nov 19, 2013 on Dryad.
Cite this dataset
Palloix, Alain; Quenouille, Julie; Paulhiac, Estelle; Moury, Benoit (2013). Data from: Quantitative trait loci from the host genetic background modulate the durability of a resistance gene: a rational basis for sustainable resistance breeding in plants [Dataset]. Dryad. https://doi.org/10.5061/dryad.s4n76
The combination of major resistance genes with quantitative resistance factors is hypothesized as a promising breeding strategy to preserve the durability of resistant cultivar, as recently observed in different pathosystems. Using the pepper (Capsicum annuum)/Potato virus Y (PVY, genus Potyvirus) pathosystem, we aimed at identifying plant genetic factors directly affecting the frequency of virus adaptation to the major resistance gene pvr23 and at comparing them with genetic factors affecting quantitative resistance. The resistance breakdown frequency was a highly heritable trait (h²=0.87). Four loci including additive quantitative trait loci (QTLs) and epistatic interactions explained together 70% of the variance of pvr23 breakdown frequency. Three of the four QTLs controlling pvr23 breakdown frequency were also involved in quantitative resistance, strongly suggesting that QTLs controlling quantitative resistance have a pleiotropic effect on the durability of the major resistance gene. With the first mapping of QTLs directly affecting resistance durability, this study provides a rationale for sustainable resistance breeding. Surprisingly, a genetic trade-off was observed between the durability of PVY resistance controlled by pvr23 and the spectrum of the resistance against different potyviruses. This trade-off seemed to have been resolved by the combination of minor-effect durability QTLs under long term farmer selection.
Primary_data_Quenouille et al
Additional data: phenotypic and genotypic data for the QTL detection in the doubled haploid progeny. Resistance Breakdown (RB): The values indicated correspond to the average of the RB frequencies of two independent tests.For each test and each pepper line, the RB frequency was assessed by the ratio of the number of systemically infected plants over the total number of inoculated plants (30 plants per test). AUDPC : The values indicated correspond to the average of the AUDPC of three independent tests. For each test, symptoms were evaluated on the 20 plants. Virus Accumulation : The values indicated correspond to the average of virus accumulation independently evaluated on 10 individual plants per DH line. For each DH line, genotypic data are indicated in the following way : 2 corresponds to the Perennial allele, 1 corresponds to the YoloWonder allele. NA= missing data