Research Papers: Mating of British and Peruvian Populations of Potato Cyst-Nematodes Globodera spp.

Abstract

The compatibility of populations of G. rostochiensis (Ro 1) and G. pallida (Pa 3) from the United Kingdom and Peru were studied by making single male-female crosses. Reciprocal crosses within and between populations showed that British and Peruvian populations of the same species interbreed and produce many eggs. Although interspecific matings occur, fewer eggs are produced and F1 progeny rarely survive. G. pallida males tended only to mate with their own females, whereas G. rostochiensis males mated with G. pallida females more frequently. G. rostochiensis females preferred their own males. This may operate to the disadvantage of G. pallida when both species occur together.