Table 1.

Frequencies of Phragmites haplotypes worldwide

Geographic region	Total no. of samples	% Regional haplotypes	% Haplotype I	% Haplotype M
North America, after 1960	195	31.3	7.2	61.5
North America, before 1910	62	83.9	9.7	6.4
South America	11	27.2	72.7	0
Europe	41	39.0	0	61.0
Asia/Australia	27	55.6	11.1	33.3
Africa	9	88.9	0	11.1

Regional haplotypes refer to those found only in the corresponding geographic region.