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

ABSTRACT

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 S_cS₂ genotype and the Kabaasi male parent had S₁S₉ alleles. Forty-three of the F₁ progenies showed self-compatibility allele (S_c) by having either S_cS₉ or S_cS₁ 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: S_cS₁ 31.2%, S₁S₂ 27.3%, S_cS₉ 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.

KEYWORDS:

• Prunus armeniaca
• Paviot
• Kabaasi
• F₁ progenies
• self-incompatibility
• S-genotypes

Acknowledgments

The authors thank Lorenzo Burgos, Nuria Alburquerque and Lydia Bremaud from Centro de Edafologia y Biologia Aplicada del Segura (CEBAS-CSIC), Murcia, Spain, for providing valuable help, support and advice.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This research was supported by The Council of Higher Education of Turkey.