Figure legends
Fig. 1 The phylogenetic tree of M. graminicola population in China based on the COI gene. The mtCOI sequences were imported into MAFFT for multiple sequence matching, and then the compared sequences were imported into Gblock of PhyloSuite software for trimming, and the optimized data were used for optimal model selection by ModelFinder software. Bayesian inference with GTR+F+G4 model for mtCOIsequence was conducted in MrBayes 3.2.6 plugin in PhyloSuite.
Fig.2 Histogram of haplotype frequencies in each M. graminicolagroups.
Fig. 3Median-Joining haplotype network of 54 M. graminicolapopulations based on mtCOI gene using NETWORK software 5.0. Each numbered circle (Hap1-Hap15) represents an unique haplotype, and the size of the circle is proportional to the overall frequency of each haplotype in the entire sample of the species. Each line connecting the haplotypes refers to a mutational step. Marks on the lines indicate the number of steps. Colors correspond to different sampling locations and names are given in abbreviations by initials of the group.
Fig 4 Correlation between genetic distance and geographical distance in the M. graminicola populations based on mtCOIIgene.Genetic distance and geographical distance of the populations are listed in Appendix 1 and Appendix 2, respectively.
Table 1Meloidogyne graminicola samples obtained fromOryzasativa growing areas of China