01811naa a2200277 a 450000100080000000500110000800800410001910000250006024501150008526000090020052009740020965000210118365000270120465000280123165000210125965000190128070000160129970000190131570000190133470000200135370000150137370000180138870000180140670000180142477300910144211328442022-12-08       2022    bl uuuu     u00u1 u    #d1 aS??NCHEZ-MORA, F. D.  aPyramiding of resistance alleles to grape powdery mildew assisted by molecular markers.h[electronic resource]  c2022  aDisease resistance gene pyramiding is a widely used strategy to enhance resistance durability. Marker-assisted selection (MAS) was applied to pyramide the alleles Run1 and Ren3, which confer resistance against grape powdery mildew (Erysiphe necator). Two F1  full-sibs carrying Run1 and Ren3 in heterozygosity were selfed to develop the breeding populations used in the analysis. From the 637 genotyped plants, 313 (50.6%) had the Run1 and Ren3 pyramided. Seven (1.1%) of them exhibited the two resistance alleles in homozygosity. Plants without any resistance alleles had the highest disease severity (X̅ = 7.3), while the ones with the Run1 allele both in homozygosity and heterozygosity were highly resistant (X̅ = 1.5). Similar level of resistance was observed in the plants containing Run1 and Ren3 pyramided (X̅ = 1.3). Plants containing Run1 and Ren3 pyramided in homozygosity are important genetic resources for grape breeding programs in Brazil.  aErysiphe necator  amelhoramento gen??tico  aresist??ncia a doen??as  asustentabilidade  aVitis vinifera1 aSAIFERT, L.1 aZANGHELINI, J.1 aPAIX??O, C. A.1 aVESCO, L. L. D.1 aEIBACH, R.1 aB??, M. A. D.1 aNODARI, R. O.1 aWELTER, L. J.  tCrop Breeding and Applied Biotechnology, Vi??osa, MGgv. 22, n. 4, p. e42252247, 2022.