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Breeding for resistance to American gooseberry mildew, Sphaerotheca mors‐uvae , in the gooseberry ( Ribes grossularia )
Author(s) -
KEEP ELIZABETH
Publication year - 1974
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.1744-7348.1974.tb01363.x
Subject(s) - sphaerotheca , biology , ribes , powdery mildew , botany , mildew , backcrossing , cultivar , resistance (ecology) , ornamental plant , horticulture , gene , agronomy , genetics
SUMMARY Strong resistance to American gooseberry mildew ( Sphaerotheca mors‐uvae ) occurred in eight out of ten F 1 progenies from crosses of resistant North American Eugrossularia species with European gooseberry cultivars or seedlings. Bimodal segregations in four of these F 1 's and in one F 1 derived from the wild European Ribes grossularia uva‐crispa suggested that each donor carried a major dominant resistance gene. Such a gene, Sph 1 was identified in a first backcross from R. oxyacanthoides. Accessions of R. oxyacanthoides, R. leptanthum and R. watsonianum proved the most promising donors of resistance to mildew and leaf spot ( Pseudopeziza ribis ).