QTLs mapping of morphological traits related to salt tolerance in Medicago truncatula

• Autorzy: Arraouadi S. , Chardon F. , Huguet T. , Aouani M. E. , Badri M.
• Języki publikacji: EN

Abstrakty

EN

To understand the complex inheritance of tolerance to salt stress in Medicago truncatula, quantitative trait loci (QTLs) analysis was performed using a set of recombinant inbred lines (RILs) derived from a cross between the tolerant line Jemalong A17 and susceptible line F83005.5. The RILs and parental lines were grown in individual pots filled with sterilized sand in a greenhouse under 0 and 50 mM NaCl. Plants were harvested after a period of 60 days. Fourteen quantitative traits related to aerial and root growths were measured. Broad-sense heritability of measured traits ranged from 0.21 to 0.83 and from 0.05 to 0.62 in control and in salt-stressed conditions, respectively. Established correlations between measured traits are dependent on treatment effect. We identified and mapped 10 QTLs in control conditions and 19 in salt stress. No major QTL was identified indicating that tolerance to salt stress is governed by several genes with low effects. The QTLs detected under control and under salt-stressed conditions almost did not share the same map locations suggesting that the loci that are not stable across treatments reflect adaptation to this constraint. The maximum of QTLs was observed on the chromosome 8. The usefulness of these QTLs, identified in greenhouse conditions, for markerassisted selection should therefore be evaluated under field conditions, and validated in other genetic backgrounds.

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2011
• Tom: 33
• Numer: 3
• Opis fizyczny: p.917-926,fig.,ref.

Twórcy

autor

Arraouadi S.

• Laboratory of Legumes, Centre of Biotechnology of Borj Cedria, B.P. 901, Human-Lif 2050, Tunisia

autor

Chardon F.

• Institut Jean-Pierre Bourgin, UMR 1318, INRA-AgroParisTech, Route de St Cyr, 14, 78026 Versailles, France

autor

Huguet T.

• Laboratoire de Symbiose et Pathologie des Plantes, INP-ENSAT, B.P. 107, 31326 Castanet Tolosan Cedex, France

autor

Aouani M. E.

• NEPAD/North Africa Biosciences Network, National Research Centre, El Buhouth St, Cairo 12311, Egypt

autor

Badri M.

• Laboratory of Legumes, Centre of Biotechnology of Borj Cedria, B.P. 901, Human-Lif 2050, Tunisia

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