Table 3. Neutrality tests of p20 gene of CTV isolates from Italy corresponding to different introductions.

Introductions	No. isolates	Fu & Li’s D	Fu & Li’s F	Tajima’s D
Sicily A	1	NA*	NA	NA
Sicily B	44	−2.850†	−3.033†	−2.001†
Sicily C	9	−1.896‡	−2.081‡	−1.745†
Sicily D	26	2.341‡	−2.446‡	−1.524
Sicily E	30	2.524‡	−2.782†	−2.018†
Apulia	7	−0.269	−0.430	−0.771

NA = non-applicable as there is only one CTV isolate.

^†P<0.05,

^‡P<0.10,