Fig. 4From: Development of F1 hybrid population and the high-density linkage map for European aspen (Populus tremula L.) using RADseq technologyMapping of QTLs affecting the height variation of one-year-old seedlings derived from artificial cross of two P. tremula genotypes. Upper scan: paternal linkage map. Lower scan: maternal linkage map. Length of 19 linkage groups (cM) are given below. LOD significance threshold were determined on the basis of 1000 permutations at a significance level of P < 0.05Back to article page