Comparison of Nine Clones of ‘Jewel’ Strawberry in Ontario and Nova Scotia.

Hughes, B.R., Fisher, P., and Jamieson, A.R. (2013). "Comparison of Nine Clones of ‘Jewel’ Strawberry in Ontario and Nova Scotia.", International Journal of Fruit Science, 13(1-2), pp. 175-183. doi : 10.1080/15538362.2012.698155  Access to full text


Nine clones of ‘Jewel’ strawberry, all originating from the same source in 1997, and propagated at one location in 2008, were compared in replicated trials planted in Kentville, NS and London, ON in 2009. Six of the clones were from micropropagated plants in Ontario, two were from runner-propagated plants, and the last was from the nursery that had provided the original stock. Data on vegetative and reproductive factors were recorded at both sites in 2009 and 2010. The number of runners, leaf petiole length, and the severity of powdery mildew were recorded 60 days after planting. Plot fullness was rated the first fall and the following spring. In the spring of the second year, plant vigor, phenology, and the number of flower stalks and flowers per stalk were recorded. Fruit yield, whether marketable or unmarketable, and berry counts were recorded twice weekly in the second year. Clonal differences were noted in all the plant measurements. For example, one of the runner-propagated ‘Jewel’ clones, JEEL 9, had the highest number of runners and the longest petioles. Site x clone interactions were significant for spring vigor and spring plotfill ratings and for the number of flower stalks. Differences in flower development were also noted, however, there were no significant differences in harvest date. There was a small but significant difference in berry weight but not in marketable or total yield. The clonal variation described in this study was not of sufficient scope to explain the poor crops that some growers have occasionally reported. Alternative explanations are offered.

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