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Breeding of "Wongyo 3111", Intermediate Strawberry Parent Line with High Sugar Content and Large-sized Fruit  

Rho, Il Rae (Protected Horticulture Research Station, National Institute of Horticultural & Herbal Science, RDA)
Cho, Yong Seop (Protected Horticulture Research Station, National Institute of Horticultural & Herbal Science, RDA)
Cheong, Jae Wan (Protected Horticulture Research Station, National Institute of Horticultural & Herbal Science, RDA)
Jeong, Ho Jeong (Protected Horticulture Research Station, National Institute of Horticultural & Herbal Science, RDA)
Publication Information
Korean Journal of Breeding Science / v.41, no.3, 2009 , pp. 319-323 More about this Journal
Abstract
Strawberry is an out-crossed crop that is relatively sensitive to inbreeding, and as a result, most of breeding programmes in strawberry have been based on selection breeding where elite parents are selected from intercrossing. Also, pedigree breeding has been successfully employed in a number of instances to concentrate genes of interest. Therefore, in order to obtain inbred line having the genotype of excellent combining ability by selfing and incrossing to improve breeding efficiency of strawberry, elite varieties were self-pollinated. From the selfing line of "Benihoppe" cultivar, we selected "Wongyo 3111" having excellent horticultural traits such as plant vigor, sugar content and fruit hardness among these progenies. "Wongyo 3111" shows erect plant type, vigorous growth habit, early flower bud differentiation with 16~17 flowers per cluster. Fruits of "Wongyo 3111" are conical type having a bright red skin color, and 17.2 g in an average weight. Also that have a relatively more high sugar/acid ratio and firmness than check cultivars as sugar content of 11.3oBx, acidity of 0.50% and firmness of 21.7 g/$mm^2$. But although yield of "Wongyo 3111" is not significantly different from check cultivars, its marketable yield is remarkably lower than that of check cultivars because of poor fruit-setting under low temperature. Disease and pest reactions of "Wongyo 3111" are more sensitive to powery mildew, anthracnose and spotted spider mites than check cultivars. Therefore, "Wongyo 3111" is suitable for intermediate parent line better than as a cultivation cultivar.
Keywords
Strawberry; Breeding; Selfing; Intermediate parent line; Selection;
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