ISHS Acta Horticulturae 701: XII International Symposium on Apricot Culture and Decline
BEGINNING OF THE FERTILE PERIOD AND THE VARIABILITY OF FLOWERING PHENOPHASE IN APRICOTS (PRUNUS ARMENIACA L.) |
| Author: | Z. Vachun |
| Keywords: | genotype, phenophase, flower, fertility |
| Abstract:
Within the period of 1994-1999, the evaluation of 34 cultivars revealed that the beginning of the fertile period varies with the genotype. In the third year after planting, altogether 32.3 % of genotypes produced first flowers, however only two of them ('Lemeda' and 'Farmingdale') produced a commercial harvest. The variability in the flowering period and the course of individual microphenophases of flowering are influenced by the genotype and (much more) by the climate. The sensitivity of individual cultivars to climatic changes is not the same. The variety 'Arzami aromatnyi' is relatively sensitive because the differences in the beginning of flowering ranged, in dependence on the microphenophase, from 25 to 29 days. The lowest sensitivity, i. e. 18 to 22 days, was observed in the cultivar Harlayne. The rank of cultivars, as defined on the base of the beginning of microphenophases 'Beginning of flowering' and 'End of flowering' was practically the same in all years under study (values of correlation coefficients ranged from r=0.4+ to r=0.8++). | |
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