Table 1

Resistant (R) and susceptible (S) progeny from 83 crosses to introgress the PdR1a and PdR1b locus into rootstock, wine, table, and raisin grape varieties. The first five resistant parents carry the PdR1a resistance locus and all others carry the PdR1b resistance locus. All plants were screened with two SSR markers. Only progeny that carry resistant alleles with both markers were planted in the field. Recombinant seedlings and plants without greenhouse screen data are not included.