Vol. 72 No: 2

Title:
Factors Affecting Pollen Grain Viability in the Strawberry (Fragaria × Ananassa Duch.)

Author:
J. ZEBROWSKA

pp: 213-220

Abstract:
Pollen grain viability is one of the most decisive factors controlling the yield of quality fruit achieved after open pollination of strawberry flowers. Experiments were carried out to establish additional plant characteristics, which can be associated with the expression of this trait. These characteristics have been identified because of the relationships between pollen grain viability and other traits. The viability of fresh and stored pollen grains positively correlates with anther dimensions and weight as well as with pollen grain length. Other traits such as anther number and shape index show a negative influence on pollen grain viability. Similar phenotypic correlations have been calculated for the rate of pollen tube growth. The results suggest that strawberry genotypes with a small number of large and nearly square anthers produce a high percentage of viable pollen grains, which can be stored satisfactorily for one year at low temperatures.

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