Ribes nigrum germplasm was screened for random amplified polymorphic D
NA (RAPD) markers. Fifty-four markers were identified which generated
individual fingerprints for each of 21 cultivars. Genetic variation wi
thin R. nigrum germplasm, as detected by RAPDs, demonstrated that the
genetic basis for improvement of blackcurrant is narrower than would b
e expected by the analysis of parentage.