Note: The name of each provincial is indicated in three abbreviated capital letters. Anhui: ANH; Fujian: FUG; Guangdong: GUD; Guangxi: GUX; Hainan: HAN; Henan: HEN; Hunan: HUN; Jiangsu: JIS; Jiangxi: JIX; Sichuan: SIC;

Table 2 Genetic diversity and neutrality test of mtDNA COI gene amongMeloidogyne graminicola groups