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Resistance to Leptosphaeria coniothyrium in the red raspberry and some related species
Author(s) -
JENNINGS D. L.
Publication year - 1979
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1979.tb06548.x
Subject(s) - biology , blowing a raspberry , inoculation , spore , resistance (ecology) , rubus , hybrid , botany , horticulture , mycelium , agronomy
SUMMARY Useful resistance to Leptosphaeria coniothyrium was found in the red raspberry cv. Latham, but its effectiveness was affected by the stage of growth reached by the canes when they were inoculated and by the kind of inoculum used: it was effective when field‐grown canes were inoculated in mid‐August but less so when they were inoculated in early July, and more effective against a spore inoculum than against a mycelial one. Resistance was inherited as a dominant multigenic character, but there were interactions between parents and two very favourable combinations were found. The species Rubus pileatus, R. mesogaeus, R. coreanus and R. lasiocarpus showed resistance when inoculated in pot experiments, but F 1 hybrids obtained by crossing them with the raspberry were largely susceptible. The problems of using these resistance sources in breeding are discussed.