SPECIFICUL ÎNFRUNZIRII DESCENDENŢILOR STEJARULUI PEDUNCULAT (QUERCUS ROBUR L.) ÎN DIFERITE PROVENIENŢE

Petru CUZA Universitatea de Stat din Moldova

Аннотация

THE SPECIFICITY OF THE LEAF DESCENDANTS OF THE PEDUNCULATE OAK (QUERCUS ROBUR L.) OF DIFFERENT PROVENANCE

The peculiarities of the pedunculate oak leaves (Quercus robur L.) descendants of different ecological origin, were researched. It was demonstrated that the frequency of distribution of leaf spreading to pedunculate oak saplings coming from different ecological areas is random, specific and distinct. Over the years the variation in the distribution of the expected day of the leaf, and the weighted average of the positive temperatures sum during of leaf, are is maintained fact which notes that the descendants of each provenance is characterized by specific genes. Furthermore, the characte-ristics of the investigated provenance on the leaf growing in descendants reflect to a significant extent the genotype specificity of the seed tree in the forest resorts where the acorn was harvested. Among the investigated genetic families, an increased variability was observed in the initiation and duration of the seedling process. The underlying phenomenon denotes the manifestation of genetic heterogeneity for a sufficient adaptation of the progeny to variations in climatic factors over the years in the same habitat, which ensures the survival of the oaks viability.

Keywords: Quercus robur, crops of provenance, leaf, genetic heterogeneity.