Transference of resistance to black‐currant gall mite, <i>Cecidophyopsis ribis</i>, from gooseberry to black currant

Abstract

SUMMARY Field and insectary tests confirmed that the black‐currant gall mite ( Cecidophyopsis ribis ) is unable to survive on gooseberry and red currant. A dominant gene Ce , controlling resistance to the gall mite, has been transferred from gooseberry to black currant. Resistant, large‐fruited, self‐fertile black currants of commercial potential have been obtained in the third backcross. One accession of Ribes bracteosum and three of R. americanum proved field susceptible to the gall mite, but twenty‐four accessions of other Ribes species remained free from galled buds for at least 3 years in an infection plot.