BC 90-19-34 and BC 93-16-43 are red raspberry (Rubus idaeus L.) selections from the Agriculture and Agri-Food Canada, Pacific Agri-Food Research Center (AAFC-PARC) breeding program being released as germplasm available for breeding. These two selections are F1 hybrids between wild North American red raspberry (Rubus strigosus Michx.) and ‘Tulameen’, which were initially selected for their combination of outstanding resistance to root rot caused by Phytophthora rubi [(Wilcox & Duncan) Man in’t Veld] and resistance to colonization by the aphid vector of the raspberry mosaic virus complex in North America, Amphorophora agathonica Hottes. Aphid resistance in these two selections is conferred by novel sources not yet found in any cultivars and that have not yet been overcome by any of the six biotypes of A. agathonica identified to date. In addition to being resistant to root rot and aphid colonization, BC 93-16-43 appears to also represent a novel source of resistance to pollen transmission of raspberry bushy dwarf virus (RBDV) conferred by its wild parent, Kanata-B. Root rot and raspberry bushy dwarf virus are two of the biggest disease issues limiting raspberry production around the world (Hall et al., 2009). In addition, aphid resistance is an important tool for combating aphid-vectored viruses that may cause plant decline by themselves in some cases but can also exacerbate symptoms and spread of raspberry bushy dwarf virus in mixed infections because of increased titer levels (Quito-Avila and Martin, 2012; R. Martin, personal communication).
Although lacking the yield, fruit size, and firmness to merit commercial production in their own right, both selections have a very good aromatic flavor, good fertility for first-generation hybrids from wild plants, and have been valuable as parents in the AAFC-PARC breeding program because of their outstanding insect and disease resistance. BC 90-19-34 and BC 93-16-43 are being released because use of this germplasm should help breeding programs to broaden the base of resistance in existing elite lines while being able to recover the yield, fruit size, and/or firmness required for commercial production in one to two generations of backcrossing to complementary parents.
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