THE EFFECT OF RECIPROCAL GRAFTING ON THE TOLERANCE OF TWO POTATO CULTIVARS TO POTATO CYST NEMATODE (GLOBODERA PALLIDA AND G. ROSTOCHIENSIS) BY D. L. TRUDGILL Zoology Department, Scottish Crop Research Institute, Invergowrie, Dundee DD2 5DA, Scotland The tolerance of grafted potato plants of cv. Cara and cv. Pentland Dell to damage by Globodera pallida and G. rostochiensis was examined in an experiment in large pots. Four combina- tions of grafts were made; Cara and Pentland Dell each with themselves and onto each other. Harvesting plants sequentially showed that their overall growth was determined largely by the scion, but that the degree of tolerance to potato cyst nematodes was determined by the stock. Overall, the results provided further evidence that cv. Cara is relatively tolerant to both species of PCN. Keywords: stock effect, scion effect, yield, tolerance, Cara, Pentland Dell. In recent field trials the potato cv. Cara was consistently more tolerant to damage by both species of potato cyst nematodes (Globodera rostochiensis and G. pallida) than cv. Pentland Dell (Whitehead et al., 1980; Evans, 1982; Trudgill & Cotes, 1983a; Trudgill et al., 1983). Cara matures later and produces a larger top and root system than Pentland Dell and
Nematologica – Brill
Published: Jan 1, 1986
Keywords: Cara; scion effect; Pentland Dell; yield; tolerance; stock effect
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