Genotypic influence on long-term multipucation of potato cyst nematode, Globodera pallida and G. rostochiensis present in southern hills of India

Two pathotypes of Globodera pallida and one of G. rostochiensis were studied for variation in long-term buildup on three highly resistant VTn² potato clones and one susceptible potato clone in the southern hills of India. The variation due to genotypic influence and long-term build up relations were studied under microplot and pot conditions and compared. Existence of differential susceptibility in these clones and the utility relations of certain highly resistant VTn² clones were brought out along with the breeding worth of them.