Figure 5From: Allelic variation within the S-adenosyl-L-homocysteine hydrolase gene family is associated with wood properties in Chinese white poplar (Populus tomentosa)Decay of linkage disequilibrium within PtoSAHHA and PtoSAHHB in the natural population. Pairwise correlations between SNPs were plotted against the physical distance between SNPs (bp). Curves describe the nonlinear regression of r2 (Er2) onto the physical distance (bp).Back to article page