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  • Author or Editor: Michel Lareau x
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Sixteen commercially grown strawberry cultivars with different degrees of resistance to red stele were evaluated for yield, plant characteristics and fruit quality. `Bounty', `Midway', and `Sparkle' had sufficient interior and exterior fruit color, good to satisfactory flavor and suitability for freezing. However, these cultivars as well as `Redcoat' lacked sufficient fruit firmness. `Bounty', `Redcoat', `Redchief and `Sparkle' had the highest yield in the three-year test. `Annapolis', `Earliglow' and `Scott' had reflexed calyx whereas `Allstar', `Annapolis', `Cornwallis', `Earllglow', `Guardian' and `Sunrise' were characterized by a raised neck suitable for mechanical dehulling. `Sunrise' appeared to be the only cultivar free of leaf scorch and leaf spot. `Tristar', `Redchief, `Lester', `Darrow' and `Arking' roots had the lowest incidence of red stele when planted in a naturally-infested field. No relationship between fruit characteristics was observed which suggests the necessity to examine each Individual tralt.

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Three mathematical indices were developed to estimate: a) potential for early dollar return or early ripening (IE), b) concentrated cropping (IC), and deviation or similarity of a genotype to known cultivars (ID). Early ripening genotypes with high yield early in the season will have larger IE values than late genotypes with lower yield early in the season. Genotypes with few harvests will have larger IC values than those requiring several harvests. The ID index helps to identify and group genotypes with similar characteristics. These indices condense large numbers of values or arrays of traits into single index values, thereby simplifying genotype comparisons.

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Frozen fruit of five locally grown strawberry cultivars and a recent introduction were compared to imported berries for making jam. Line scales were used to evaluate sensory attributes. Cultivars differed only in acidity, fruity flavor, and berry integrity. Jam produced with Quebec-grown berries was less acidic and more fruity tasting than that made from imported Mexican berries. `Kent' had better fruit integrity than Mexican berries, followed by `Chambly', `Midway', `Bounty', and `Glooscap'. Frozen local strawberries were preferred to Mexican berries for making jam. Overall impression was better for Quebec-grown strawberries with the exception of `Midway', which had lower overall impression than Mexican berries.

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