Fig. 4From: The genetic structure of Turnip mosaic virus population reveals the rapid expansion of a new emergent lineage in ChinaThe frequency distribution of the number of pairwise nucleotide differences obtained from CP gene nucleotide sequences. a basal-BR II group of Weifang; b Asian-BR group of Weifang; c basal-BR II group of Tai’an, d basal-BR III group of Tai’an; e basal-BR II group of Tai’an, f basal-BR III group; g Changchun isolates of basal-BR group. Broken line represents the observed data and unbroken line represents the expected data. The sub-populations less than four isolates were not includedBack to article page