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Halle (Saale), Universität (2004)

The inheritance and molecular mapping of genes for post-anthesis drought tolerance (PADT) in wheat

Farag, Khaled Fathy Mahmoud Salem

Titre : The inheritance and molecular mapping of genes for post-anthesis drought tolerance (PADT) in wheat

Auteur : Farag, Khaled Fathy Mahmoud Salem

Université de soutenance : Halle (Saale), Univ., Diss.,

Grade : Doctor agriculturarum (Dr. agr.) 2004

Résumé
Wheat is the first important and strategic cereal crop for the majority of world’s populations. Postanthesis drought stress is a common problem in wheat production. For that, seventy-seven wheat accessions and two wheat mapping populations were screened. Quantitative trait loci (QTLs) analysis was carried out with two wheat mapping populations - a set of 114 recombinant inbred lines (RILs) from the International Triticeae Mapping Initiative (ITMI) population of ’W7984’ (tolerant) x ’Opata 85’ (sensitive) and 81 F2/3 families from the cross ’TRI 5283’ (tolerant) x ’TRI 15010’ (sensitive). The aim was to identify genomic regions controlling traits related to post-anthesis drought tolerance (PADT). In two experiments in Gatersleben, the amount of dry matter stored and mobilized was estimated by measurement of changes in 1000-grain weight after chemical desiccation treatment (KI). We have determined the chromosomal locations of QTLs affecting 7 grain characters under drought stress.

Mots Clés : Weizen, Trockentoleranz nach der Blüte, Quantitative trait loci, Rekombinanten Inzuchtlinien, Internationalen Triticeae Mapping Initiative, 1000-Korngewicht, Chemical desiccation, Chromosom location, Kornmerkmale, Kaliumiodid — Wheat, Post-anthesis drought tolerance, Quantitative trait loci, Recombinant inbred lines, International Triticeae Mapping Initiative, 1000-grain weight, Chemical desiccation, Chromosomal locations, Grain characters, Potassium iodide

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