Segregation Distortion for Male Parents in High Density Genetic Maps from Reciprocal Crosses between Two Self-Incompatible Cultivars Confirms a Gametophytic System for Self-Incompatibility in Citrus

Self-incompatibility is an important evolutionary feature in angiosperms and has major implications for breeding strategies horticultural crops. In citrus, when coupled with parthenocarpy, it enables the production of seedless fruits a mono-varietal orchard. A gametophytic incompatibility system one S locus was proposed but its molecular mechanisms remain subject debate. The objective this work to locate by analyzing segregation distortion reciprocal crosses two self-incompatible citrus sharing allele compare location previously published models. High density genetic maps ‘Fortune’ mandarin ‘Ellendale tangor’ with, respectively, 2164 SNP 1467 markers, were constructed using genotyping sequencing data. They are highly syntenic collinear clementine genome. Complete rejection only observed male parents genomic area, at beginning chromosome 7 reference Haplotype data area surrounding theoretical agreement genotypes. Overall, our results full recently S-RNase