ISHS Acta Horticulturae 441: V Temperate Zone Fruit in the Tropics and Subtropics
BREEDING PEACHES FOR POWDERY MILDEW (SPHAEROTECA PANNOSA) RESISTANCE IN THE SUBTROPICAL REGIONS OF CENTRAL MEXICO |
| Author: | S. Pérez-González |
| Abstract:
Powdery mildew is the most important foliage disease in local peach populations cultivated in the high subtropical highlands of Central Mexico. Resistant varieties could bring a higher level of efficiency throughout the subtropics. However, there is no information about sources of resistance to powdery mildew and its mode of inheritance. A wide range of local peach populations and introduced cultivars from contrasting geographic regions, and seedlings derived from selfing, were evaluated from 1993 to 1995. Seedling progenies had a wider range of resistance than the original cultivars. Resistance showed a normal distribution, suggesting a quantitative inheritance. Only two families showed a bimodal distribution, with resistant and susceptible genotypes forming two clearly distinguishable groups that were also normaly distributed. High heritability values (0.6 to 0.78) for resistance were estimated and this trait is now being incorporated into locally adapted peach germplasm. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
