DrisRaspTwenty

Raspberry

Note: The applicant has requested an exemption from compulsory licensing to allow time to multiply and distribute propagating material of the variety. If the exemption is granted, it may be allowed for two years from the date rights are granted for the variety.

Variety Description

Varieties used for comparison: 'Maravilla' and 'DrisRaspSeven' (Esperanza)

Summary: The dormant and current season's canes of 'DrisRaspTwenty' are longer than the dormant and current season's canes of both reference varieties. On the current season's cane, the density of spines on 'DrisRaspTwenty' is medium whereas it is sparse on 'Maravilla' and dense on 'DrisRaspSeven' . The predominant number of leaflets of 'DrisRaspTwenty' is five whereas as 'Maravilla' is three and 'DrisRaspSeven' is equally three and five. The terminal leaflet of 'DrisRaspTwenty' is smaller than that of both reference varieties.

Description:

PLANT: upright growth habit, very many current season's canes, bears fruit on previous season's cane in summer and on current season's cane in autumn, early vegetative bud burst

VERY YOUNG SHOOT: weak to medium intensity of anthocyanin colouration of apex during rapid growth, early to mid-season emergence
CURRENT SEASON`S CANE: absent of very weak bloom, absent or very weak intensity of anthocyanin colouration, medium internode length, medium to long vegetative bud, spines present
DORMANT CANE: greyish brown
SPINES ON CURRENT SEASON'S CANE: medium density, very small to small base, short to medium length, brownish purple
FRUITING LATERAL ON PREVIOUS SEASON'S CANE: semi-erect

PEDICEL: medium number of spines
LEAF: medium to dark green colour on upper side, predominantly five leaflets, medium degree of rugosity, relative position of lateral leaflets is free
LEAFLET: concave in cross-section

FLOWERING: begins early to mid-season on previous season's cane and early season on current season's cane
PEDUNCLE: very weak to weak intensity of anthocyanin colouration
FLOWER: small to medium sized

FRUIT RIPENING: begins mid-season on previous and current season's canes
FRUIT: long, medium width, medium length to width ratio, medium conical shape in lateral view, dark red, weak to medium degree of glossiness, soft to medium firmness, weak adherence to plug
DRUPE: large
FRUITING PERIOD: medium to long on previous season's cane and medium length of time on current season's cane

Origin & Breeding History: 'DrisRaspTwenty' originated from a controlled cross conducted between 'DrisRaspTwelve' (female parent) and the proprietary line 'RG40.2' (male parent) in Santa Cruz County, California, USA in April 2009. A single seedling of 'DrisRaspTwenty' was selected in August 2011 based on yield and fruit size. 'DrisRaspTwenty' was further propagated by root cuttings from 2011 to 2020 in Santa Cruz County, California, USA.

Tests & Trials: The comparative trial for 'DrisRaspTwenty' was conducted in Chilliwack, British Columbia during the 2022 growing season. Plants were transplanted in April 2021 into raised beds, covered with plastic mulch and irrigated with drip lines. The plots were arranged in a RCB design with four replicates. Each replicate consisted of 3 plants for a total of 12 plants of each variety. Plants were spaced approximately 90 centimetres apart within rows and 3 metres between rows. A total of 20 measurements were taken from each variety. Mean differences were significant at the 5% confidence probability level based on a paired Student`s t-test.

Comparison tables for 'DrisRaspTwenty' with reference varieties 'Maravilla' and 'DrisRaspSeven'

Dormant cane length (cm)

Current season's cane length (cm)

Terminal leaflet length (cm)

Terminal leaflet width (cm)

Click on image for larger view

Raspberry: 'DrisRaspTwenty' (centre) with reference varieties 'DrisRaspSeven' (left) and 'Maravilla' (right)

Click on image for larger view

Raspberry: 'DrisRaspTwenty' (centre) with reference varieties 'DrisRaspSeven' (left) and 'Maravilla' (right)