Analysis of the productivity potential of nectarine cultivars | Analiza rodnog potencijala sorti nektarine
2010
Milatović, D., Poljoprivredni fakultet, Beograd - Zemun (Serbia) | Nikolić, D., Poljoprivredni fakultet, Beograd - Zemun (Serbia) | Đurović, D., Poljoprivredni fakultet, Beograd - Zemun (Serbia)
In 15 nectarine cultivars during a three-year period the following properties were studied: flower density, i.e. number flowers per 1 m length of 1-year old shoot, initial and final fruit set by open pollination, and yield per 1 m length of shoot. For these properties heritability and correlation coefficients were also calculated. Statistically significant differences among cultivars were found for all the studied properties. The highest density of flowers was found in cultivars Pegaso and Hardired, and the lowest in cultivar Cassiopea. Studied cultivars were characterized by high fruit set by open pollination: initial fruit set was 50-78%, and final fruit set 18-46%. Yield per 1 m length of 1-year old shoot was the lowest in cultivars Armking and Flamekist (0.7 kg), and the highest in cultivar Pegaso (2.2 kg). The coefficient of variability was the lowest for the initial fruit set and flower density, then for the final fruit set, while it was the highest for yield. The relatively high value of heritability was established only for the flower density. Significant correlation coefficients were found between the initial and final fruit set (r=0.29), flower density and yield (r=0.62), as well as between final fruit set and yield (r=0.66). In areas with higher risk of freeze damage, the cultivars characterized by higher flower density and fruit set should be grown, because they can provide high and regular yielding. At the same time, to achieve good fruit quality these cultivars require more intensive pruning and fruit thinning.
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