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Title

Identification of Self-Incompatibility Alleles by Specific PCR Analysis and S-RNase Sequencing in Apricot

AuthorsHerrera, Sara; Rodrigo García, Javier; Hormaza Urroz, José Ignacio ; Lora, Jorge CSIC ORCID
KeywordsApricot
Gametophytic Self-Incompatibility
Pollen TUBE
Pollination
Prunus armeniaca
S-alleles
S-genotype
Issue Date15-Nov-2018
PublisherMultidisciplinary Digital Publishing Institute
CitationInternational Journal of Molecular Sciences 19(11): 3612 (2018)
AbstractSelf-incompatibility (SI) is one of the most efficient mechanisms to promote out-crossing in plants. However, SI could be a problem for fruit production. An example is apricot (Prunus armeniaca), in which, as in other species of the Rosaceae, SI is determined by an S-RNase-based-Gametophytic Self-Incompatibility (GSI) system. Incompatibility relationships between cultivars can be established by an S-allele genotyping PCR strategy. Until recently, most of the traditional European apricot cultivars were self-compatible but several breeding programs have introduced an increasing number of new cultivars whose pollination requirements are unknown. To fill this gap, we have identified the S-allele of 44 apricot genotypes, of which 43 are reported here for the first time. The identification of Sc in 15 genotypes suggests that those cultivars are self-compatible. In five genotypes, self-(in)compatibility was established by the observation of pollen tube growth in self-pollinated flowers, since PCR analysis could not allowed distinguishing between the Sc and S8 alleles. Self-incompatible genotypes were assigned to their corresponding self-incompatibility groups. The knowledge of incompatibility relationships between apricot cultivars can be a highly valuable tool for the development of future breeding programs by selecting the appropriate parents and for efficient orchard design by planting self-compatible and inter-compatible cultivars.
Publisher version (URL)https://doi.org/10.3390/ijms19113612
URIhttp://hdl.handle.net/10261/172541
DOI10.3390/ijms19113612
E-ISSN1422-0067
Appears in Collections:(IHSM) Artículos

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