Molecular detection of QTL for agronomic and quality traits in a doubled haploid barley population. Aust J Crop Sci

Abstract

Abstract In order to efficiently use new dwarf germplasm Huaai 11 for breeding program, it is important to identify the QTL of agronomic and quality traits. In the present study, QTL analysis was performed for ten agronomic and one quality traits using a DH population of a 122 lines derived from the cross of Huaai 11 × Huadamai 6. Composite interval mapping procedures detected a total of 17 QTL which were mapped onto five chromosomes. Six QTL, Qhd2-12, Qmsl2-15 and Qmsl7-7, Qgwp7-7, Qgws7-7and Qtgw7-10 were detected in all years. Ten QTL were found on chromosome 7H. The QTL on chromosome 7H has effect on grain weight per plant, grain protein content, and main spike length, which accounted for 35.11%, 45.74% and 54.88% of phenotypic variation, respectively. Positive transgressive segregation was found for all traits. Some of QTL identified in this study could be targeted for an efficient transfer into new cultivars by applying MAS