Abstract
Fruit set of five sour cherry cultivars (‘Újfehértói fürtös’, ‘Éva’, ‘Petri’, ‘Pándy 279‘ and ‘Csengôdi’) of eight years-old trees grown in Újfehértó, located in the Eastern north part of Hungary have been studied over two years (2008 & 2009). Following reciprocally cross-pollination, free-pollination, self-pollination (autogamy) artificial self-pollination (geitonogamy) were studied. The results show that both maternal and paternal parent cultivates had significant effects on the percentage fruit set. Significant differences have been found in fruit set among years and among pollination treatments. Fruit set of free-pollinated Pándy 276 cultivar was low and seasonally highly variable. The yield of this cultivar on self-pollinated flowers was nearly 0%, and in this treatment the maximum yields did not reach 10% in any of the examined cultivars. There was no significant relationship in the fruit set of free-pollination and natural self-pollination treatments.
Highlights
Sour cherry (Prunus cerasus L.) is a major crop with increasing acreage in the world
The objective of this work was to study the efficiency of pollination in different cultivars of sour cherry using treatments of natural self-pollination, free-pollination and cross-pollination for determining the suitable cultivars to be used as pollinators for maternal cultivars
Whereas most of sour cherry cultivars are partially selfincompatible or completely self-incompatible, crosspollination is necessary to ensure commercial fruit set and the orchard must be planted with associated polliniser cultivars
Summary
Sour cherry (Prunus cerasus L.) is a major crop with increasing acreage in the world. Fruit set percentage vary among sour cherry cultivars and even affected by the pollen donor cultivars. This variation in fruit set can be attributed to numerous environmental and genetic factors. Fertility of sour cherry cultivars has been studied by several researchers. Middlebrook (1916) described 9 self fertile sour cherry cultivars. Kostina (1926) mentioned that among 29 sour cherry cultivars, 9 of them were self fertile. Crane and Lawrence (1929) showed that among sour cherry and duke cherry cultivars there were entirely self sterile and cultivars with high degrees of self fertility. Kozma et al (2003) categorized sour cherry varieties to 3 groups according their fertility relations Fertility of sour cherry cultivars has been studied by several researchers. Middlebrook (1916) described 9 self fertile sour cherry cultivars. Kostina (1926) mentioned that among 29 sour cherry cultivars, 9 of them were self fertile. Crane and Lawrence (1929) showed that among sour cherry and duke cherry cultivars there were entirely self sterile and cultivars with high degrees of self fertility. Kozma et al (2003) categorized sour cherry varieties to 3 groups according their fertility relations
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