Identification and localization of QTLs controlling drought tolerance and seed oil and protein content in normal and waterstress regime in sunflower.
2007
Nabi Pur, A`li Reza | Sarrafi, Ahmad
Drought is one the most important factors limiting yield and culture area of crop plants and also may modify the yield quality. Identification of genetic factors improving plant drought tolerance might increase the efficiency of breeding programs aiming drought tolerant cultivars. In order to finding genomic regions affecting drought tolerance, as well as markers linked to drought tolerance and protein and oil content in sunflower, 100 recombinant inbred lines including their two parents, RHA266 and PAC2, were cultured in field under full and limited irrigation as an alpha-lattice arrangement with two replications. Besides, 20 mutant lines with previous promising results for drought tolerance were culture as a randomized complete block design with two replications. Analysis of variance revealed significant differences among the genotypes in both conditions. QTL mapping using composite interval method resulted in identification of several genomic regions controlling the drought tolerance traits. Markers kinked to the studied traits are reported.
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