Theoretical and Applied Genetics

, Volume 116, Issue 3, pp 427–438

Resistance to Erysiphe necator in the grapevine ‘Kishmish vatkana’ is controlled by a single locus through restriction of hyphal growth

  • Sarolta Hoffmann
  • Gabriele Di Gaspero
  • László Kovács
  • Susanne Howard
  • Erzsébet Kiss
  • Zsuzsanna Galbács
  • Raffaele Testolin
  • Pál Kozma
Original Paper

DOI: 10.1007/s00122-007-0680-4

Cite this article as:
Hoffmann, S., Di Gaspero, G., Kovács, L. et al. Theor Appl Genet (2008) 116: 427. doi:10.1007/s00122-007-0680-4

Abstract

Vitis vinifera ‘Kishmish vatkana’, a cultivated grapevine from Central Asia, does not produce visible symptoms in response to natural or artificial inoculation with the fungus Erysiphe necator Schwein., the casual agent of powdery mildew. ‘Kishmish vatkana’ allowed pathogen entry into epidermal cells at a rate comparable to that in the susceptible control Vitis vinifera ‘Nimrang’, but was able to limit subsequent hyphal proliferation. Density of conidiophores was significantly lower in ‘Kishmish vatkana’ (33.6 ± 8.7 conidiophores mm−2) than in ‘Nimrang’ (310.5 ± 24.0 conidiophores mm−2) by 120 h after inoculation. A progeny of 310 plants from a ‘Nimrang’ × ‘Kishmish vatkana’ cross were scored for the presence or absence of visible conidiophores throughout two successive seasons. Phenotypic segregation revealed the presence of a single dominant allele termed Resistance to Erysiphe necator 1 (REN1), which was heterozygous in ‘Kishmish vatkana’. A bulked segregant analysis was carried out using 195 microsatellite markers uniformly distributed across the entire genome. For each marker, association with the resistance trait was inferred by measuring in the bulks the ratio of peak intensities of the two alleles inherited from ‘Kishmish vatkana’. The phenotypic locus was assigned to linkage group 13, a genomic region in which no disease resistance had been reported previously. The REN1 position was restricted to a 7.4 cM interval by analyzing the 310 offspring for the segregation of markers that surrounded the target region. The closest markers, VMC9H4-2, VMCNG4E10-1 and UDV-020, were located 0.9 cM away from the REN1 locus.

Supplementary material

122_2007_680_MOESM1_ESM.tif (6.4 mb)
Figure S1. Microsatellite markers used for bulked segregant analysis. A set of 291 microsatellite markers scattered over the genome was selected in order to evenly cover all linkage groups. Microsatellites belonged to the markers series scu, UDV, VMC, VrZag, VVI, and VVS (Di Gaspero et al., 2007). Marker orders and distances are based on the consensus map of Doligez et al. (2006). Gaps were filled in with additional markers present in the consensus map of Di Gaspero et al. (2007). Each additional marker was projected onto the map of Doligez et al. (2006) in the interval between the surrounding two markers shared by the two maps in a position at the centre center of the interval. No map distance is given for these markers in this map. Bold markers were heterozygous in ‘Kishmish vatkana’ and hence informative for BSA (TIF 6.34 kb)

Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • Sarolta Hoffmann
    • 1
  • Gabriele Di Gaspero
    • 2
    • 3
  • László Kovács
    • 4
  • Susanne Howard
    • 4
  • Erzsébet Kiss
    • 5
  • Zsuzsanna Galbács
    • 5
  • Raffaele Testolin
    • 2
    • 3
  • Pál Kozma
    • 1
  1. 1.Research Institute of Viticulture and EnologyPecsHungary
  2. 2.Dipartimento di Scienze Agrarie e AmbientaliUniversity of UdineUdineItaly
  3. 3.Istituto di Genomica ApplicataParco Scientifico e Tecnologico Luigi DanieliUdineItaly
  4. 4.Department of AgricultureMissouri State UniversityMountain GroveUSA
  5. 5.Institute of Genetics and BiotechnologySzent István UniversityGödöllöHungary