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Marker-trait associations of yield related traits in bread wheat (Triticum aestivum L.) under a semi-arid climate

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  • Salem Marzougui

    (Pôle Régional de Recherche Développement Agricoles du Nord-Ouest semi-aride à El Kef, Institution de la Recherche et de l'Enseignement Supérieur Agricoles (IRESA), Tunisia
    Field crops Laboratory, INRAT, University of Carthage, Tunisia)

  • Mohamed Kharrat

    (Field crops Laboratory, INRAT, University of Carthage, Tunisia)

  • Mongi ben Younes

    (Pôle Régional de Recherche Développement Agricoles du Nord-Ouest semi-aride à El Kef, Institution de la Recherche et de l'Enseignement Supérieur Agricoles (IRESA), Tunisia)

Abstract

Identifying QTLs (quantitative trait loci) that control yield related traits under a stressed environment is very useful for marker-assisted selection (MAS). Marker-trait associations (MTA) for several agro-morphological traits were performed with 130 Tunisian and exotic spring bread wheat (Triticum aestivum L.) accessions under a semi-arid climate in El Kef, Tunisia. Grain yield and other important traits were evaluated. A population structural analysis identified two sub populations. In total, 29 MTAs were detected at -log P ≥ 3 using an MLM (mixed linear model), and only 5 MTAs with -log P ≥ 4. The locus on chromosome 4A was detected to control the heading date accounting for up to 22% of the trait variance. Two other loci located on chromosomes 3B and 7B were found to be stable during the two cropping seasons and have a pleiotropic effect on the heading date, yield, internodes length and grain per spike. These two regions are candidates for further genetic analysis.

Suggested Citation

  • Salem Marzougui & Mohamed Kharrat & Mongi ben Younes, 2019. "Marker-trait associations of yield related traits in bread wheat (Triticum aestivum L.) under a semi-arid climate," Czech Journal of Genetics and Plant Breeding, Czech Academy of Agricultural Sciences, vol. 55(4), pages 138-145.
    • Handle: RePEc:caa:jnlcjg:v:55:y:2019:i:4:id:154-2018-cjgpb
    DOI: 10.17221/154/2018-CJGPB
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    References listed on IDEAS

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    1. Lê, Sébastien & Josse, Julie & Husson, François, 2008. "FactoMineR: An R Package for Multivariate Analysis," Journal of Statistical Software, Foundation for Open Access Statistics, vol. 25(i01).
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