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Genetic Diversity within a Global Panel of Durum Wheat (Triticum durum) Landraces and Modern Germplasm Reveals the History of Alleles Exchange

Kabbaj, Hafssa and Sall, Amadou T. and Al-Abdallat, Ayed and Dida, Mulatu Geleta and Amri, Ahmed and Filali-Maltouf, Abdelkarim and Belkadi, Bouchra and Ortiz Rios, Rodomiro Octavio and Bassi, Filippo M. (2017). Genetic Diversity within a Global Panel of Durum Wheat (Triticum durum) Landraces and Modern Germplasm Reveals the History of Alleles Exchange. Frontiers in Plant Science. 8, 1277
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Official URL: http://dx.doi.org/10.3389/fpls.2017.01277

Abstract

Durum wheat is the 10th most important crop in the world, and its use traces back to the origin of agriculture. Unfortunately, in the last century only part of the genetic diversity available for this species has been captured in modern varieties through breeding. Here, the population structure and genetic diversity shared among elites and landraces collected from 32 countries was investigated. A total of 370 entries were genotyped with Axiom 35K array to identify 8,173 segregating single nucleotide polymorphisms (SNPs). Of these, 500 were selected as highly informative with a PIC value above 0.32 and used to test population structure via DAPC, STRUCTURE, and neighbor joining tree. A total of 10 sub-populations could be identified, six constituted by modern germplasm and four by landraces of different geographical origin. Interestingly, genomic comparison among groups indicated that Middle East and Ethiopia had the lowest level of allelic diversity, while breeding programs and landraces collected outside these regions were the richest in rare alleles. Further, phylogenetic analysis among landraces indicated that Ethiopia might represent a second center of origin of durum wheat, rather than a second domestication site as previously believed. Together, the analyses carried here provide a global picture of the available genetic diversity for this crop and shall guide its targeted use by breeders.

Authors/Creators:Kabbaj, Hafssa and Sall, Amadou T. and Al-Abdallat, Ayed and Dida, Mulatu Geleta and Amri, Ahmed and Filali-Maltouf, Abdelkarim and Belkadi, Bouchra and Ortiz Rios, Rodomiro Octavio and Bassi, Filippo M.
Title:Genetic Diversity within a Global Panel of Durum Wheat (Triticum durum) Landraces and Modern Germplasm Reveals the History of Alleles Exchange
Series/Journal:Frontiers in Plant Science (1664-462X)
Year of publishing :2017
Volume:8
Page range:1277
Number of Pages:13
Publisher:Frontiers
ISSN:1664-462X
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Agris subject categories.:F Plant production > F30 Plant genetics and breeding
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 404 Agricultural Biotechnology > Plant Biotechnology
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 404 Agricultural Biotechnology > Genetics and Breeding
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
Agrovoc terms:hard wheat, agrobiodiversity, plant breeding
Keywords:center of diversity, couscous, domestication, evolution, pasta, Axiom 35K, array, durum wheat
URN:NBN:urn:nbn:se:slu:epsilon-e-4521
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-4521
Additional ID:
Type of IDID
Web of Science (WoS)000406033800001
ID Code:14782
Faculty:LTV - Fakulteten för landskapsarkitektur, trädgårds- och växtproduktionsvetenskap
Department:(LTJ, LTV) > Department of Plant Breeding (from 130101)
Deposited By: SLUpub Connector
Deposited On:01 Dec 2017 09:38
Metadata Last Modified:01 Dec 2017 09:38

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