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Variation in resistance level of potato genotypes and virulence level of potato cyst nematode populations

โœ Scribed by F. K. Arntzen; F. A. Eeuwijk

Publisher
Springer
Year
1992
Tongue
English
Weight
621 KB
Volume
62
Category
Article
ISSN
0014-2336

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โœฆ Synopsis

In two experiments, using different testing methods, the number of newly formed cysts was determined on nine potato genotypes with resistance from various sources . Ten potato cyst nematode (PCN) populations were used in these experiments . Rank correlation between numbers of cysts over potato genotype-PCN population combinations for both experiments was high (r s = 0 .90) . Dendrograms for PCN populations and potato genotypes were constructed, based on a simultaneous hierarchical clustering procedure for potato genotype-PCN population interaction terms . Several virulence groups could be identified within Globodera rostochiensis as well as within G. pallida. Host genotypes, derived from the same sources of resistance, were clustered in different' resistance groups .

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