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AMOVA and modified F-statistics (Theta (θ)-statistics; Weir and Cockerham, 1984). A) Subdivision of North American Ostrinia nubilalis haplotypes into Atlantic coast (sites 1, 2, and 5) and Midwestern collection sites (sites 5–15, Table 2; the Ithaca, New York laboratory colony haplotype data were omitted). B) Subdivision of sympatric univoltine (UZ) and bivoltine (BZ) ecotypes from Lamberton and Rosemount, Minnesota collection sites (sites 12 and 13; Table 2).
