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

Ollitrault Patrick, Ahmed Dalel, Costantino Gilles, Evrard Jean-Charles, Cardi Céline, Mournet Pierre, Perdereau Aude, Froelicher Yann. 2021. 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. Agriculture (Basel), 11 (5):379, 21 p.

Url - jeu de données - Entrepôt autre : https://www.ncbi.nlm.nih.gov/bioproject/PRJNA705866

Quartile : Q1, Sujet : AGRONOMY

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

Mots-clés Agrovoc : carte génétique, Citrus, Autostérilité, génotype, phytogénétique, Citrus reticulata, Citrus maxima, génome, variété

Mots-clés géographiques Agrovoc : Corse, France

Mots-clés libres : Genotyping by sequencing, S-RNAse, C. reticulata, C. maxima, Skewed segregation, Genetic mapping, Self-incompatibility

Classification Agris : F30 - Génétique et amélioration des plantes

Champ stratégique Cirad : CTS 2 (2019-) - Transitions agroécologiques

Auteurs et affiliations

• Ollitrault Patrick, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0002-9456-5517 - auteur correspondant
• Ahmed Dalel, INRAE (FRA)
• Costantino Gilles, INRAE (FRA)
• Evrard Jean-Charles, CIRAD-BIOS-UMR AGAP (FRA)
• Cardi Céline, CIRAD-BIOS-UMR AGAP (FRA)
• Mournet Pierre, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0001-8011-8647
• Perdereau Aude, Genoscope (FRA)
• Froelicher Yann, CIRAD-BIOS-UMR AGAP (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/598160/)

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