Study of Pod Length Trait in Doubled Haploid Brassica napus Population by Molecular Markers

Pod length is one of the effective components on canola yield selection on the basis ofwhich can increase not only the seed yield but also the oil yield. Molecular markers associatedwith long pod loci were identified in a doubled haploid population derived from across between the canola lines ‘Quantum’ (long pod) and bulked segregant analysis. A molecular marker linkage map of 37 loci for this populationwas used to identify quantitative trait loci (QTL) controlling pod length of whichtwo markers in two unlinked loci were selected by using an interval mapping model whichexplained 22% of phenotypic variation for pod length in this population. Selection formarkers at two loci for increasing pod length resulted in a group of doubled haploid lineswith an average 112 mm pod length that increased 15% of whole population mean. Thisshows that using these markers in the breeding program will enhance the breeding of longpod canola varieties.× ‘China A’ (short pod) using RAPD