Imported: 12 Feb '17 | Published: 14 Jul '15
USPTO - Plant Patents
A new and distinct blueberry variety is described. The variety results from selection among a population of seedlings derived from the controlled cross of the varieties ‘Elliott’ (not patented) and ‘Puru’ (U.S. Plant Pat. No. 6,701). The new variety is distinguished from others by its late seasonality, fruit size, and plant habit. Fruit of ‘Blue Silk’ is medium-large in size with a medium-strong bloom.
Genus and species of plant claimed: Vaccinium corymbosum.
Variety denomination: ‘Blue Silk’.
Seeds obtained from the deliberate crossing of the varieties ‘Elliott’ (not patented), female parent, and ‘Puru’ (U.S. Plant Pat. No. 6,701), male parent, which occurred at Ruakura, Hamilton, New Zealand were shipped to Gilten, Germany. Seedlings obtained from this cross were planted out in Gilten, Germany in 2002. Three seedlings were selected from this family in 2004, one of which was given the breeder code ‘ZDM035’. In the Northern Hemisphere summer of 2008 ‘ZDM035’ was identified as having potential as a new variety and in 2009 it was asexually propagated. The resulting plants were planted out at Gilten and were subsequently found to be true to type demonstrating that the characteristics of the new variety are stable and transmitted without change through succeeding generations. Asexual propagation has since been carried out through both soft and hard wood cuttings in Gilten, Germany. ‘ZDM035’ was later designated ‘Blue Silk’. ‘Blue Silk’ is distinguished from its parents, ‘Elliot’ and ‘Puru’, as fruit bloom is heavier than both parents. ‘Blue Silk’ fruit is harvested mid-late season while ‘Puru’ is early season and Elliot late season.
Blue Silk’ is characterised by its mid-late seasonality, fruit size, bloom, and upright habit. ‘Blue Silk’ is distinguished from a number of other varieties by the following characteristics:
‘Blue Silk’ is harvested significantly later than ‘Bluecrop’ (not patented) grown in Gilten, Germany. Fruit of ‘Blue Silk’ have been observed to be starting to turn blue when approximately 50% of the ‘Bluecrop’ crop has been harvested.
‘Blue Silk’ produces medium to large fruit, averaging 2.2 g, whereas ‘Nui’ (U.S. Plant Pat. No. 6,699) produces large fruit, averaging 3 g, which reach harvest maturity earlier, under the same conditions in Germany.
The following is a description of the new variety with color terminology in accordance with The Royal Horticultural Society Colour Charts (R.H.S.C.C.) 2001 edition.
The specimens described were grown in Gilten, Germany. The observations were made in the 2010-2014 seasons on 4-8 year old bushes.