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conventional breeding methods ( Knapp, 1998 ; Moreau et al., 1998 ; Ru et al., 2016 ). Previous research conducted for various crops has shown the superiority of MAS techniques for breeding. Such crops include almond ( Sorkheh et al., 2017 ), apple ( Edge

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small number of more recent, successful introductions (e.g., ‘Fuji’, ‘Gala’, ‘Cripps Pink’, ‘Honeycrisp’) are the results of breeding programs. Numerous biological features in apple hinder the rapid development of new cultivars, including self

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been sufficiently evaluated among commercial cultivars, and, at times, it is not considered as a trait for selection in apple breeding, although a cultivar in which the fruit hardly softens is advantageous to the apple market and industry. Crosses

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fruit quality is a major part of any apple breeding program, and breeders are constantly searching for methods to help measure these important traits. To date, sensory analysis is by far the most preferred form of testing for crispness; however, there is

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), as well as reliance on experienced/trained panelists. Since its inception in 1994, the Washington State University apple breeding program (WABP) has amassed fruit textural data (i.e., instrumental measurements and sensory assessment) through routine

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Apple ( Malus × domestica Borkh.) breeding at the UMN began in 1878 as an effort to develop cultivars of high fruit quality that could “meet the extremes of [Minnesota’s] mid-continental climate” ( Alderman et al., 1957 ). For apple production

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breeding programs, which often use a limited number of founder individuals, will exhibit LD decay at a longer physical distance than more broadly based germplasm populations that are sampled over extensive natural ranges. GWA was recently reported for apple

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Abstract

The Research Institute of Pomology, Skiemiewice, Poland started its apple rootstock improvement program in the 1950s (9). As a result of that work, the “ P” series rootstocks have been released, of which P2 and P22 appear the most promising (4). The rootstock breeding program is continuing (10), and heritabilities of some horticulturally valuable traits are being studied.

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50 ORAL SESSION 8 (Abstr. 480–486) Fruits/Nuts: Genetics/Breeding/Biotechnology Monday, 24 July, 2:00–3:45 p.m

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The Arkansas apple breeding program began in 1966 with objectives to develop high quality, dual purpose, adapted cultivars with a range of harvest dates and resistance to spring diseases. The program has two goals: 1) to develop red colored apples which are large, tart, firm and ripen between June and August; and, 2) develop yellow apples as a replacement for `Golden Delicious' which are large, typey, without russet and with a range of maturities from July through September. Apples with commercial potential are AA-18 (red, ripens 1-July), AA-44 (red, ripens 15-July), AA-58 (yellow, ripens 29-Aug.), AA-65 (yellow, ripens 11-Sept.) and AA-62 (yellow, ripens 15-Sept.). Data on time of bloom, harvest, fruit size, and fruit storage tests will be presented.

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