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primocane-fruiting blackberries. In my discussion, I highlight potential value of primocane-fruiting blackberries, provide background on the origin of this type of fruiting habit, and comment on breeding challenges that have been identified in their early

segregating populations would assist in studies of the genetics and heritability of resistance and may support the development of breeding tools such as marker assisted breeding strategies. Exploiting resistance to black spot on citrus fruit requires an

fruit scion breeding programs and did not consider programs addressing rootstock (one response) and rose (two responses). This reduced the total number of responses to 32. Furthermore, because of the small number of breeding programs having as the main

Oral Session 14—Fruit Breeding 28 July 2006, 4:15–5:15 p.m. Bayside A Moderator: David Byrne

main purposes of modern plum breeding are climatic adaptation, precocity, high and regular yield, extension of ripening time, high fruit quality, and abiotic and biotic resistance. The genetic variability of accessions was initially based on assessing

To be successful, a breeding program has to be able to track all its seedlings at every stage of testing and to ensure that the origin of each seedling product (e.g., fruit) tested is correctly recorded. The Washington State University apple

faced when implementing priorities when selecting a trait for inclusion in a breeding program. For all 33 models, the set of independent variables is the same: binary variables for fruit crop type (strawberries, apples, peaches, blackberries, red

-incompatibility, high heterozygosity, extended juvenility, and long generation times (e.g., Janick et al., 1996 ). The polygenic nature of many fruit quality traits serves as an additional complicating factor in fruit breeding programs. Fruit texture traits such as

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

the NIFTS Okitsu and Kuchinotsu Citrus Research Stations ( Nishiura, 1964 ). The breeding targets in this program currently focused on fruit traits, such as FW, high SSC, and ease of eating that is determined mainly by EP and FSM. In addition, it is