THE PERFORMANCE OF NORTH AMERICAN DAY-NEUTRAL CULTIVARS AND THE USE OF THIS GERMPLASM FOR BREEDING IN THE UNITED KINGDOM
Breeding for an extended production season is an important objective of the HRI strawberry breeding performance. From late July onwards strawberries can only be produced in the UK by using either cold-stored waiting bed plants or everbearing and day-neutral cultivars. The Dutch everbearing cultivar Rapella is grown on a small scale but everbearer production has not expanded due to problems with the existing cultivars. Consequently the North American day-neutrals have been tested in the UK and used as parents in the breeding programme. The day-neutral cultivars did not behave significantly differently from European everbearers in terms of the timing of their flowering and fruiting periods. Also, they were poorly adapted in British conditions and produced low yields, but were superior to everbearers for fruit quality, particularly berry firmness, and had better runner production. ‘Selva’ has been the most successful parent of nine day-neutrals tested and has combined best when crossed with another day-neutral or everbearing type. Two sister seedlings, ‘Calypso’ and ‘Tango’, from the cross ‘Selva’ x ‘Rapella’ have recently been named.
Simpson, D.W. (1993). THE PERFORMANCE OF NORTH AMERICAN DAY-NEUTRAL CULTIVARS AND THE USE OF THIS GERMPLASM FOR BREEDING IN THE UNITED KINGDOM. Acta Hortic. 348, 124-130