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Rpv10: a new locus from the Asian Vitis gene pool for pyramiding downy mildew resistance loci in grapevine
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Rpv10: a new locus from the Asian Vitis gene pool for pyramiding downy mildew resistance loci in grapevine
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Journal Article
Rpv10: a new locus from the Asian Vitis gene pool for pyramiding downy mildew resistance loci in grapevine
2012
Overview
A population derived from a cross between grapevine breeding strain Gf.Ga-52-42 and cultivar ‘Solaris’ consisting of 265 F1-individuals was genetically mapped using SSR markers and screened for downy mildew resistance. Quantitative trait locus (QTL) analysis revealed two strong QTLs on linkage groups (LGs) 18 and 09. The locus on LG 18 was found to be identical with the previously described locus
Rpv3
and is transmitted by Gf.Ga-52-42. ‘Solaris’ transmitted the resistance-related locus on LG 09 explaining up to 50% of the phenotypic variation in the population. This downy mildew resistance locus is named
Rpv10
for resistance to
Plasmopara viticola
.
Rpv10
was initially introgressed from
Vitis amurensis
, a wild species of the Asian
Vitis
gene pool. The one-LOD supported confidence interval of the QTL spans a section of 2.1 centi Morgan (cM) corresponding to 314 kb in the reference genome PN40024 (12x). Eight resistance gene analogues (RGAs) of the NBS–LRR type and additional resistance-linked genes are located in this region of PN40024. The F1 sub-population which contains the
Rpv3
as well as the
Rpv10
locus showed a significantly higher degree of resistance, indicating additive effects by pyramiding of resistance loci. Possibilities for using the resistance locus
Rpv10
in a grapevine breeding programme are discussed. Furthermore, the marker data revealed ‘Severnyi’ × ‘Muscat Ottonel’ as the true parentage for the male parent of ‘Solaris’.
Publisher
Springer-Verlag,Springer,Springer Nature B.V
Subject
