|Dossett, Michael - Agri Food - Canada|
Submitted to: Acta Horticulturae
Publication Type: Proceedings
Publication Acceptance Date: 1/11/2014
Publication Date: 1/13/2014
Publication URL: http://www.actahort.org/books/1017/
Citation: Lee, J., Dossett, M., Finn, C.E. 2014. Anthocyanin rich black raspberries can be made even better. Acta Horticulturae. 1017:127-133.
Technical Abstract: Our research group has worked the last 7 years on improving the phenological, vegetative, and phytochemical traits of US grown black raspberries. We have been awarded USDA/NIFA-Specialty Crops Research Initiative (SCRI) funding to continue our project as a multi-region and international collaboration enhancing black raspberries. Current interest in the rich color of black raspberries, and their historical use as an effective dye, derive from their anthocyanin composition and content. We will report our findings on 860 analyzed samples from two growing seasons. Study plants represented 130 wild populations from 27 US states and two Canadian Provinces; all were collected as wild seedlings and grown in a common environment. Total anthocyanins ranged from 39-996 mg/100mL (expressed as cyanidin-3-glucoside; 25 fold difference), confirming that not all black raspberries are equal in natural pigment production. We have also identified a unique mutant black raspberry that lacks rutinoside-containing anthocyanins. Until the discovery of this mutant, all black raspberry anthocyanins comprised (in elution order): cyanidin-3-sambubioside, cyanidin-3-glucoside, cyanidin-3-xylosylrutinoside, cyanidin-3-rutinoside, pelargonidin-3-glucoside, pelargonidin-3-rutinoside, and peonidin-3-rutinoside. A reassessment of the literature concurrent with our data showed that some reports had misidentified the cyanidin-3-xylosylrutinoside peak. We recently published a review article to rectify many such conflicting issues with black raspberry information. Our presentation will incorporate some of these findings.