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Rubus coreanus as donor of resistance to cane diseases and mildew in red raspberry breeding

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Summary

Strong resistance to the cane diseases Elsinoë veneta, Didymella applanata and Botrytis cinerea, and to Sphaerotheca macularis, occurred in F1 and BC1 derivatives of an accession of Rubus coreanus. Resistance to cane spot (E. veneta) was polygenic.

In eight out of ten BC1 progenies, average grades for cane spot infections were significantly higher in white-flowered (an 1) than pink-flowered (An 1) plants and in hairy-caned (H) than in glabrous (h) seedlings. It is postulated that in R. coreanus factors controlling resistance are linked with An 1 and. probably, with h.

Average grades for spur blight (D. applanata) were significantly higher in white-flowered plants in nine out of ten BC1 progenies. Spininess (S) was associated with greater susceptibility in six out of eight BC1 families, although this difference was not statistically significant.

Plants with the phenotype hAn 1 on average provided the best source of resistance to both cane spot and spur blight.

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Keep, E., Knight, V.H. & Parker, J.H. Rubus coreanus as donor of resistance to cane diseases and mildew in red raspberry breeding. Euphytica 26, 505–510 (1977). https://doi.org/10.1007/BF00027019

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  • DOI: https://doi.org/10.1007/BF00027019

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