Low levels of phosphorous in soils seriously limit seed production of Brassica napus. Ding et al. investigate phenotypic variation of seed yield and yield-related traits in B. napus plants grown with contrasting supplies of P, and identify a total of 74 putative quantitative trait loci (QTLs). The results suggest that different genetic determinants are involved in controlling yield and yield-related traits under normal and low P conditions, and the QTLs detected under reduced P supply may prove useful in marker-assisted selection.
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