GI 2091


Denomination: 'GI 2091'
Botanical Name: Prunus cerasus x P. canescens
Applicant/Holder: Consortium Deutscher Baumschulen GmbH
Hauptstr. 21
Breeder: Werner Gruppe, Linden, Germany
Hanna Schmidt, Marbug, Germany
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Tel: 519-631-6241
Application Date: 2003-10-02
Application Number: 03-3851
Grant of Rights Date: 2014-12-29
Certificate Number: 4973
Grant of Rights Termination Date: 2032-12-29

Variety Description

Variety used for comparison: 'Gisela 6'

Summary: The plants of 'GI 2091' flower early whereas those of 'Gisela 6' flower very early. The leaves of 'GI 2091' are longer than those of 'Gisela 6'. The upper side of the leaf blades of 'GI 2091' have weak glossiness whereas those of 'Gisela 6' have medium glossiness. The leaf blades of 'GI 2091' are weakly to moderately cupped whereas those of 'Gisela 6' are moderately to strongly cupped. The margin of the leaf blades of 'GI 2091' have absent to very weak undulation whereas those of 'Gisela 6' have undulation ranging from weak to medium. The flower buds of 'GI 2091' have a protruding pistil whereas those of 'Gisela 6' do not.


PLANT: strong vigour, upright to spreading growth habit, branching density ranching from medium to strong, early season flowering
YOUNG SHOOT: weak anthocyanin colouration of young leaf during rapid growth
ONE-YEAR-OLD SHOOT: medium thickness, no pubescence on upper third, medium to many lenticels, anthocyanin colouration at apex ranging from strong to very strong, medium branching density at the end of summer
ONE-YEAR-OLD SHOOT VEGETATIVE BUD: markedly held out in relation to shoot, medium sized, obtuse apex, medium sized support

LEAF BLADE: medium length to width ratio, elliptic, acute apex, medium length of tip, obtuse base, medium green on upper side, weak glossiness on upper side, weak pubescence on lower side of apex, both crenate and serrate margin incisions, medium depth of margin incisions, weak to moderate cupping, absent or very weak undulation of the margin
STIPULE: short
PETIOLE: pubescence on upper side ranging from medium to strong, depth of groove ranging from medium to deep
NECTARIES: predominantly two and more than two, predominantly on petiole, yellow to red, round

FLOWER BUD: protruding pistil

Origin & Breeding History: 'GI 2091' originated from an interspecific cross conducted by the breeders in Giessen, Germany during the spring of 1969 between the female parent Prunus cerasus variety 'Schattenmorelle' and an unknown variety of the species Prunus canescens. The new variety was selected for disease tolerance, limited suckering and its use as a rootstock for sweet cherries to induce dwarfing of the tree and precocity in the scion. 'GI 2091' was first propagated by softwood cuttings in the early 1970's in Giessen, Germany.

Tests & Trials: The trial for 'GI 2091' was conducted in a field during the spring and summer of 2013 in Essex, Ontario. The trial included over 40 trees each of the candidate and reference variety. Threes were planted in rows with plants spaced approximately 1 metre apart. Trees were pruned annually as per commercial practices. Observations and measurements were taken from 10 trees of each variety on May 8, 2013 (for spring characteristics including flowers and young shoot) and July 2, 2013 (for leaf characteristics). All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.

Comparison table for 'GI 2091' with reference variety 'Gisela 6'

Leaf length (cm)

  'GI 2091' 'Gisela 6'
mean 8.7 6.9
std. deviation 1.30 0.52

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GI 2091
Cherry: 'GI 2091' (left) with reference variety 'Gisela 6' (right)

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GI 2091
Cherry: 'GI 2091' (left) with reference variety 'Gisela 6' (right)

Click on image for larger view
GI 2091
Cherry: 'GI 2091' (left) with reference variety 'Gisela 6' (right)

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