Persian walnut breeding program at Naric Fruticulture Research Institute in Hungary
The Persian walnut (Juglans regia L.) is the most important shell fruit species in Hungary. Growing of this species became very popular in the past 10-15 years. Pomological evaluation of a double selected walnut population was done to select new promising genotypes at the National Agricultural Research and Innovation Centre - Fruitculture Research Institute. The experimental orchard was established in 1997, and it contains around 100 double selected different genotypes. The examined genotypes originated from the following combinations: Milotai 10 × Pedro, Pedro × Alsószentiváni 117, Alsószentiváni 117 × Pedro. During the examination period the most important characteristics of the genotypes were examined, such as blooming time, ripening time and physical parameters of the walnut fruits. Difference was observed during the examination of blooming time and ripening time compared to the standard Hungarian cultivar. Based on the results of the measurement of physical parameters all genotypes reached 32 mm fruit size in diameter, which is the requirement of the first grade fruits on the market. The fruit weight and fruit volume values of most hybrids exceeded the results of the control cultivar Alsószentiváni 117. Only two genotypes reached 50% in kernel rate. Eleven genotypes reached the ideal 70% cracking ratio (ratio of halves and whole). Based on the results of this study three genotypes (tree no. V/2/28-30, tree no. V/3/30-31 and tree no. BD6) were found to have excellent values. Further studies are required to investigate these three promising walnut hybrids.
Bujdosó, G., Izsépi, F., Szügyiné Bartha, K., Varjas, V. and Szentiványi, P. (2020). Persian walnut breeding program at Naric Fruticulture Research Institute in Hungary. Acta Hortic. 1280, 89-94
characteristics, evaluation of a hybrid population, phenological observations, traits