Biotechnological and Oenological Potential of Advanced Genetic Lines of Grapevine Resistant to Powdery Mildew ( Erysiphe necator )

Phillip Ormeño-Vásquez, Viviana Sosa-Zuniga, Mariona Gil-Cortiella, Rene Morales-Poblete, Carolina Vallejos, Consuelo Medina, Claudio Meneses and Patricio Arce-Johnson ()
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Phillip Ormeño-Vásquez: Departamento de Fruticultura y Enología, Facultad de Agronomía y Sistemas Naturales, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Macul, Santiago 7820436, Chile
Viviana Sosa-Zuniga: Centro de Investigación e Innovación, Viña Concha y Toro, Fundo Pocoa s/n, Km10 Ruta K650, Pencahue 355000, Chile
Mariona Gil-Cortiella: Departament de Bioquímica i Biotecnologia, Facultat d’Enologia, Universitat Rovira i Virgili, 43007 Tarragona, Spain
Rene Morales-Poblete: Departamento de Fruticultura y Enología, Facultad de Agronomía y Sistemas Naturales, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Macul, Santiago 7820436, Chile
Carolina Vallejos: Instituto de Ciencias Aplicadas, Universidad Autónoma de Chile, 5 Poniente 1670, Talca 3467987, Chile
Consuelo Medina: Dirección de Investigación, Universidad Autónoma de Chile, Santiago 8580658, Chile
Claudio Meneses: Departamento de Fruticultura y Enología, Facultad de Agronomía y Sistemas Naturales, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Macul, Santiago 7820436, Chile
Patricio Arce-Johnson: Centro de Investigación e Innovación, Instituto de Ciencias Aplicadas, Facultad de Ingeniería, Universidad Autónoma de Chile, Av. Del Valle 534, Santiago 8580658, Chile

Agriculture, 2025, vol. 15, issue 21, 1-18

Abstract: The development of grapevine varieties combining powdery mildew ( Erysiphe necator ) resistance with acceptable wine quality represents an important goal for sustainable viticulture. This study evaluated the oenological potential of five advanced breeding lines carrying Run1 or Run1Ren1 resistance loci, developed through marker-assisted selection to achieve 99.2–99.6% Vitis vinifera genome content. Genotypes were assessed under Chilean conditions during the 2024–2025 seasons, analyzing disease resistance, berry characteristics, and wine chemical parameters. All resistant genotypes exhibited complete powdery mildew resistance (OIV scores 9) without fungicide applications. Wine analyses showed pH 3.4–3.9, titratable acidity 3.7–7.8 g/L, and total phenolics 229.2–1356.1 mg GAE/L, values within ranges reported in the literature for commercial wines. Two genotypes evaluated across both seasons showed different patterns of year-to-year variation, with AJ-T2 showing 4.7% variation in anthocyanin content, while AJ-T6 exhibited greater variation in phenolic parameters. HPLC analysis revealed anthocyanin profiles dominated by malvidin-3-glucoside without diglucoside forms, consistent with V. vinifera patterns. These preliminary results from single-plant evaluations suggest that marker-assisted breeding may contribute to developing disease-resistant varieties with wine chemical parameters within commercial ranges, though multi-plant trials with appropriate controls are essential for validation.

Keywords: oenological; grapevine; marker-assisted selection; performance; powdery mildew; resistance locus; Run1 (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2025
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