Evolutionary processes lead to the survival of individuals best adapted to local environment. This gives rise to allele
polymorphism and genetic diversity of populations. Isoenzyme proteins, which are the product of gene expression,
are an effective tool for tracking these changes. On the other hand, the reproductive potential of a given population
can be assessed based on its ability to produce viable and efficiently germinating seeds. The present results combine
molecular analyses of isoenzyme proteins with anatomical and morphological studies of Scots pine seeds (Pinus
sylvestris L.). The study was conducted in 6 populations that are characteristic of this species occurrence range in the
country. The results confirm the correlation between seed weight and embryo size. They also show a population from
northeastern Poland had a higher effective number of alleles and seed with lower germinative energy and capacity.
There was genetic homogeneity in all except for the population from Woziwoda, which was significantly different
based on the Fst test. The genetic characteristics of Scots pine from Woziwoda may be associated with the lower levels
of rainfall that occur there during the growing season. The results improve our knowledge of Scots pine variability
and contribute to the discussion of the impact of local environment on genetic variability.
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