1971•Annals of Applied BiologyRequires access

Pre‐selection for Phytophthora cactorum (Leb. &Cohn) Sehroet. resistance in apple seedlings

R. Watkins, JULIE M. WERTS

Abstract

SUMMARY Inoculation of apple seedlings at the two‐leaf stage with a Phytophthora cactorum zoospore suspension provided a rapid method of pre‐selecting for collar rot resistance, since the susceptible plants died within 2 weeks of inoculation while the resistant plants continued to grow satisfactorily. The presence of the resistance gene Pc was not alone sufficient to explain the observed segregation.

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Key concepts: Phytophthora cactorum, Biology, Zoospore, Inoculation, Collar rot, Horticulture, Resistance (ecology), Botany