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

Salem Marzougui, Mohamed Kharrat and Mongi ben Younes
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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
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

Czech Journal of Genetics and Plant Breeding, 2019, vol. 55, issue 4, 138-145

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.

Keywords: association mapping; candidate genes; yield (search for similar items in EconPapers)
Date: 2019
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlcjg:v:55:y:2019:i:4:id:154-2018-cjgpb

DOI: 10.17221/154/2018-CJGPB

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