Web of Science: 18 citations, Scopus: 20 citations, Google Scholar: citations,
Pedigree analysis of 220 almond genotypes reveals two world mainstream breeding lines based on only three different cultivars
Pérez de los Cobos, Felipe (Centre de Recerca en Agrigenòmica)
Martínez-García, Pedro J (Consejo Superior de Investigaciones Científicas. Centro de Edafología y Biología Aplicada del Segura)
Romero Aroca, Agusti Jordi (Institut de Recerca i Tecnologia Agroalimentàries)
Miarnau, Xavier (Institut de Recerca i Tecnologia Agroalimentàries)
Eduardo, Iban (Centre de Recerca en Agrigenòmica)
Howad, Werner (Centre de Recerca en Agrigenòmica)
Mnejja, Mourad (Centre de Recerca en Agrigenòmica)
Dicenta, Federico (Consejo Superior de Investigaciones Científicas. Centro de Edafología y Biología Aplicada del Segura)
Socias i Company, Rafel (Centro de Investigación y Tecnología Agroalimentaria de Aragón)
Rubio Cabetas, Maria J. (Centro de Investigación y Tecnología Agroalimentaria de Aragón)
Gradziel, Thomas M. (University of California)
Wirthensohn, Michelle (University of Adelaide. School of Agriculture, Food and Wine)
Duval, Henri (Institut National de la Recherche Agronomique (França))
Holland, Doron (Agricultural Research Organization (Israel))
Arús i Gorina, Pere (Centre de Recerca en Agrigenòmica)
Vargas, Francisco J. (Institut de Recerca i Tecnologia Agroalimentàries)
Batlle, Ignasi (Institut de Recerca i Tecnologia Agroalimentàries)

Date: 2021
Abstract: Loss 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 S 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.
Grants: Ministerio de Economía y Competitividad RTA2017-00084-00-00
Note: Altres ajuts: CERCA Programme/Generalitat de Catalunya
Rights: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. Creative Commons
Language: Anglès
Document: Article ; recerca ; Versió publicada
Subject: Inbreeding ; Plant breeding
Published in: Horticulture research, Vol. 8 (January 2021) , art. 11, ISSN 2052-7276

DOI: 10.1038/s41438-020-00444-4
PMID: 33384415


11 p, 829.8 KB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > CRAG (Centre for Research in Agricultural Genomics)
Articles > Research articles
Articles > Published articles

 Record created 2022-02-07, last modified 2023-09-04



   Favorit i Compartir