Inheritance of S-genotypes in Paviot × Kabaasi apricot F1 progenies

Self-incompatibility plays an important role in the fertilization of fruit species such as apricot. Apricot (Prunus armeniaca L.) shows gametophytic self-incompatibility, which is controlled by a multi-allelic S-locus. In this study, S-alleles of 77 F1 progenies derived from Paviot, which is one of the French local cultivars, and Kabaasi, one of the most important Turkish dried apricot cultivars, parents were identified by S-RNase intron regions polymerase chain reaction (PCR) amplification and DNA sequencing. The results from the S-allele PCR analysis revealed that the Paviot female parent had an ScS2 genotype and the Kabaasi male parent had S1S9 alleles. Forty-three of the F1 progenies showed self-compatibility allele (Sc) by having either ScS9 or ScS1 alleles. Thirty-four of the F1 progenies were self-incompatible by having either S2S1 or S2S9 alleles. The distributions of detected alleles in F1 progenies were determined as follows: ScS1 31.2%, S1S2 27.3%, ScS9 24.7% and S2S9 16.8%. The results from the study are relevant for the data obtained in apricot breeding programmes in the selection of crossing combinations and in the establishment of commercial orchards