Cross-compatbility and self-compatbility in trees of Sorbus torminalis (L.) Crantz were evaluated. Degree of mating-compatibility between three trees was determined by means of fluorescence microscope. Self-compatibility evaluated on the basis of the pollen tube germination index showed that one tree is fully self-incompatible and the other two are self-compatible. Observations of pollen tube germination showed full cross-compatibility between trees under investigation.
A. Wojciechowski, Department of Genetics and Plant Breeding, Agricultural University of Poznan, Wojska Polskiego 71c, 60-625 Poznan, Poland, email: ajwoj@au.poznan.pl