This dataset corresponds to the assignment of MUNQ (Malus UNiQue genotype) codes to a large set of apple accessions genotyped with common SSR (microsatellite) markers.

The MUNQ assignment was performed as described in Muranty-Denancé et al. (2020; https://doi.org/10.1186/s12870-019-2171-6) as a development from the FBUNQ code (for FruitBreedomics UNiQue genotype code) assigned by Urrestarazu-Denancé et al. (2016; https://doi.org/10.1186/s12870-016-0818-0) to more than 2,400 accessions from 14 mostly European apple germplasm collections after their genotyping with up to 16 SSR. When SSR marker data were obtained at other sites than IRHS (INRAE, Angers, France), SSR allele sizes were carefully adjusted between the alternative collections and the IRHS collection, both by use of reference accessions known to be in common between collections and by re-genotyping a subset of each collection with the full set of 16 SSR markers to confirm the allele adjustment. The MUNQ assignment was extended to the whole National Fruit Collection (NFC, Brogdale, UK) by using the genotyping data produced for 12 common SSR markers by Fernandez-Fernandez (2010; Fingerprinting the National Apple and Pear Collections - Final Report N° GC0140; http://sciencesearch.defra.gov.uk) with updates according to Ordidge-Venison (2018; https://researchdata.reading.ac.uk/163/).

This file will be progressively completed with MUNQ assigned to accessions from other apple germplasm collections in Europe, USA and elsewhere.

Project information: respectively: FruitBreedomics (Integrated Approach for increasing breeding efficiency in fruit tree crops) and CorePom (Exploration de diverses collections de ressources génétiques de pommier pour la construction d’une core collection représentative de la biodiversité cultivée à l’échelle nationale)