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Article

Genome-Wide Genetic Diversity and Population Structure of Tunisian Durum Wheat Landraces Based on DArTseq Technology

1
Faculté des Sciences de Bizerte, Jarzouna, 7021 Bizerte, Tunisia
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Banque Nationale de Gènes, Boulevard du Leader Yasser Arafat Z. I Charguia 1, 1080 Tunis, Tunisia
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International Center for Agricultural Research in the Dry Areas (ICARDA), 10112 Rabat, Morocco
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Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT), El Batán, 56237 Texcoco, Mexico
*
Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2019, 20(6), 1352; https://doi.org/10.3390/ijms20061352
Received: 13 December 2018 / Revised: 4 February 2019 / Accepted: 7 February 2019 / Published: 18 March 2019
(This article belongs to the Special Issue Molecular Advances in Wheat and Barley)
Tunisia, being part of the secondary center of diversity for durum wheat, has rich unexploited landraces that are being continuously lost and replaced by high yielding modern cultivars. This study aimed to investigate the genetic diversity and population structure of 196 durum wheat lines issued from landraces collected from Tunisia using Diversity Array Technology sequencing (DArTseq) and to understand possible ways of introduction in comparing them to landraces from surrounding countries. A total of 16,148 polymorphic DArTseq markers covering equally the A and B genomes were effective to assess the genetic diversity and to classify the accessions. Cluster analysis and discriminant analysis of principal components (DAPC) allowed us to distinguish five distinct groups that matched well with the farmer’s variety nomenclature. Interestingly, Mahmoudi and Biskri landraces constitute the same gene pool while Jenah Zarzoura constitutes a completely different group. Analysis of molecular variance (AMOVA) showed that the genetic variation was among rather than within the landraces. DAPC analysis of the Tunisian, Mediterranean and West Asian landraces confirmed our previous population structure and showed a genetic similarity between the Tunisian and the North African landraces with the exception of Jenah Zarzoura being the most distant. The genomic characterization of the Tunisian collection will enhance their conservation and sustainable use. View Full-Text
Keywords: durum wheat; Tunisian landraces; center of diversity; genetic diversity; population structure; DArTseq technology durum wheat; Tunisian landraces; center of diversity; genetic diversity; population structure; DArTseq technology
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MDPI and ACS Style

Robbana, C.; Kehel, Z.; Ben Naceur, M.; Sansaloni, C.; Bassi, F.; Amri, A. Genome-Wide Genetic Diversity and Population Structure of Tunisian Durum Wheat Landraces Based on DArTseq Technology. Int. J. Mol. Sci. 2019, 20, 1352. https://doi.org/10.3390/ijms20061352

AMA Style

Robbana C, Kehel Z, Ben Naceur M, Sansaloni C, Bassi F, Amri A. Genome-Wide Genetic Diversity and Population Structure of Tunisian Durum Wheat Landraces Based on DArTseq Technology. International Journal of Molecular Sciences. 2019; 20(6):1352. https://doi.org/10.3390/ijms20061352

Chicago/Turabian Style

Robbana, Cyrine, Zakaria Kehel, M’barek Ben Naceur, Carolina Sansaloni, Filippo Bassi, and Ahmed Amri. 2019. "Genome-Wide Genetic Diversity and Population Structure of Tunisian Durum Wheat Landraces Based on DArTseq Technology" International Journal of Molecular Sciences 20, no. 6: 1352. https://doi.org/10.3390/ijms20061352

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