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dc.contributor.authorPérez de los Cobos, Felipe
dc.contributor.authorMartínez-García, Pedro J.
dc.contributor.authorRomero, Agustí
dc.contributor.authorMiarnau, Xavier
dc.contributor.authorEduardo, Iban
dc.contributor.authorHowad, Werner
dc.contributor.authorMnejja, Mourad
dc.contributor.authorDicenta, Federico
dc.contributor.authorSocias i Company, Rafel
dc.contributor.authorRubio-Cabetas, Maria J.
dc.contributor.authorGradziel, Thomas M.
dc.contributor.authorWirthensohn, Michelle
dc.contributor.authorDuval, Henri
dc.contributor.authorHolland, Doron
dc.contributor.authorArús, Pere
dc.contributor.authorVargas, Francisco J.
dc.contributor.authorBatlle, Ignasi
dc.contributor.otherProducció Vegetalca
dc.date.accessioned2021-01-05T10:59:19Z
dc.date.available2021-01-05T10:59:19Z
dc.date.issued2021-01-01
dc.identifier.citationPérez de los Cobos, Felipe, Pedro J. Martínez-García, Agustí Romero, Xavier Miarnau, Iban Eduardo, Werner Howad, and Mourad Mnejja et al. 2021. "Pedigree Analysis Of 220 Almond Genotypes Reveals Two World Mainstream Breeding Lines Based On Only Three Different Cultivars". Horticulture Research 8 (1). doi:10.1038/s41438-020-00444-4.ca
dc.identifier.issn2052-7276ca
dc.identifier.urihttp://hdl.handle.net/20.500.12327/1043
dc.description.abstractLoss of genetic variability is an increasing challenge in tree breeding programs due to the repeated use of a reduced number of founder genotypes. However, in almond, little is known about the genetic variability in current breeding stocks, although several cases of inbreeding depression have been reported. To gain insights into the genetic structure in modern breeding programs worldwide, marker-verified pedigree data of 220 almond cultivars and breeding selections were analyzed. Inbreeding coefficients, pairwise relatedness, and genetic contribution were calculated for these genotypes. The results reveal two mainstream breeding lines based on three cultivars: “Tuono”, “Cristomorto”, and “Nonpareil”. Descendants from “Tuono” or “Cristomorto” number 76 (sharing 34 descendants), while “Nonpareil” has 71 descendants. The mean inbreeding coefficient of the analyzed genotypes was 0.041, with 14 genotypes presenting a high inbreeding coefficient, over 0.250. Breeding programs from France, the USA, and Spain showed inbreeding coefficients of 0.075, 0.070, and 0.037, respectively. According to their genetic contribution, modern cultivars from Israel, France, the USA, Spain, and Australia trace back to a maximum of six main founding genotypes. Among the group of 65 genotypes carrying the Sf allele for self-compatibility, the mean relatedness coefficient was 0.125, with “Tuono” as the main founding genotype (24.7% of total genetic contribution). The results broaden our understanding about the tendencies followed in almond breeding over the last 50 years and will have a large impact into breeding decision-making process worldwide. Increasing current genetic variability is required in almond breeding programs to assure genetic gain and continuing breeding progress.ca
dc.format.extent11ca
dc.language.isoengca
dc.publisherSpringer Natureca
dc.relation.ispartofHorticulture Researchca
dc.rightsAttribution 4.0 Internationalca
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.titlePedigree analysis of 220 almond genotypes reveals two world mainstream breeding lines based on only three different cultivarsca
dc.typeinfo:eu-repo/semantics/articleca
dc.description.versioninfo:eu-repo/semantics/publishedVersionca
dc.rights.accessLevelinfo:eu-repo/semantics/openAccess
dc.embargo.termscapca
dc.relation.projectIDMINECO-FEDER/Programa Estatal de I+D+I orientada a los retos de la sociedad/RTA2017-00084-00-00/ES/Mejora genética de variedades de almendro/ca
dc.subject.udc63ca
dc.identifier.doihttps://doi.org/10.1038/s41438-020-00444-4ca
dc.contributor.groupFructiculturaca


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