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    Genotype by environment interactions and combining ability for strawberry families grown in diverse environments
    (Springer, 2017) Mathey, Megan M.; Mookerjee, Sonali; Mahoney, Lise L.; Gunduz, Kazim; Rosyara, Umesh; Hancock, James F.; Stewart, Philip J.
    Ten seedlings from 36 crosses representing eastern and western North American short day and remontant genotypes were evaluated in 2011 and 2012 in California, Michigan, New Hampshire and Oregon, for phenology, flower related traits, plant characteristics, fruit characteristics and fruit chemistry traits. There was significant variability among genotypes, locations and evaluation year for most of the characteristics; however, few genotype 9 location and genotype 9 year interactions were detected. General combining ability variance components were significant for all traits and greater than SCA variance components for peduncle length, total flowering weeks, flowering cycles, truss size, growing degree days for harvest data, remontancy, achene position, ease of capping, fruit weight, percent soluble solids, titratable acidity and soluble solids/titratable acidity. `Sarian' was identified as the best contributing parent for remontancy. Narrow-sense heritability estimates were moderate to high (0.33-0.78) for total flowering weeks, flowering cycle, truss size, remontancy, number of runners, fruit weight, pH, and titratable acidity. Having a better understanding of these attributes will provide breeders guidance on the most effective breeding strategies for incorporating superior traits from this germplasm into their programs.
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    Phenotypic variability in a panel of strawberry cultivars from North America and the European Union
    (Amer Pomological Soc, 2015) Hancock, James F.; Callow, Peter W.; Mathey, Megan M.; Mackey, Ted; Gunduz, Kazim; Mookerjee, Sonali; Cai, Lichun
    The phenotypic diversity in 96 antique and modern strawberry cultivars from the European Union and North America was evaluated in Michigan and Oregon, in 2011 and 2012. A total of thirty-five fruit and developmental characteristics were measured. Significant differences (p < 0.05) were observed among cultivars and environment for most of the characteristics, although only a few significant genotype x environment interactions were found. Several cultivars were superior for multiple traits including 'Aromas' from California (size, glossiness, crop load and weeks of flowering), 'Allstar from the Mid-Atlantic States (glossiness, firmness, drip loss and soluble solids concentration), 'Florida Radiance' (external color, skin strength, size, drip loss and acidity), 'Gorella' from the European Union (skin strength, internal color and soluble solids concentration) and 'Melody' from the European Union (external color, skin strength and drip loss). No antique cultivars carried superior traits that were not found in modem cultivars. The data in these trials will be combined with DNA diagnostic tests to identify genes of importance for strawberry breeding.
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    Validating Microsatellite Markers Linked to Remontancy in Octoploid Strawberry
    (Amer Soc Horticultural Science, 2014) Salinas-Aponte, Natalia; Kim, Daeil; Hancock, James F.; Gunduz, Kazim; Denoyes, Beatrice; Perrotte, Justine; Mathey, Megan M.
    [Abstract Not Available]