ISHS Acta Horticulturae 346: V International Symposium on Vaccinium Culture
BREEDING BLUEBERRIES FOR PEST RESISTANCE IN NORTH CAROLINA |
| Authors: | J.R. Ballington, S.D. Rooks, R.D. Milholland, W.O. Cline, J.R. Meyers |
| Keywords: | Botryosphaeria corticis, Botryosphaeria dothidea, Scaphytopius magdalensis |
| Abstract:
Blueberry breeding in North Carolina was initiated to develop cultivars resistant to diseases indigenous to the southeastern United States. In the first 40 years of the program resistance to stem canker caused by Botryosphaeria corticis was the major ]emphasis. In the 1970's stem blight (SB) caused by Botryosphaeria dothidea became more of a limiting factor to production than stem canker. In addition, blueberry stunt caused by a mycoplasma and vectored by the sharpnosed leafhopper (Scaphytopius magdalensis) is also an ongoing problem. Current breeding emphasis is on combining SB resistance with non-feeding preference resistance to the sharpnosed leafhopper (SNL). SB resistance has been identified in cultivated highbush blueberry (Vaccinium corymbosum), rabbiteye blueberry (V. ashei), lowbush blueberry (V. angustifolium) and in the wild species V. elliottii and V. arboreum. Non-feeding preference resistance to the SNL has been identified in V. ashei, V. elliottii and also in V. stamineum and V. arboreum. Resistance to both SB and SNL has been identified in several V. ashei genotypes, in pentaploid backcrosses to V. corymbosum and in V. elliottii genotypes. | |
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