VLR003

Rose

Variety Description

Variety used for comparison: 'Lemon Fizz'

Summary: The plants of 'VLR003' are shorter than those of 'Lemon Fizz'. Anthocyanin colouration is present on the young shoot of 'VLR003' while it is absent on the young shoot of 'Lemon Fizz'. The stem of 'VLR003' has a medium number of prickles while the stem of 'Lemon Fizz' has few prickles. The upper side of the leaf of 'VLR003' has a weak degree of glossiness while that of 'Lemon Fizz' has a strong degree of glossiness. Flowering laterals are absent on the flowering shoot of 'VLR003' while they are present on the flowering shoot of 'Lemon Fizz'. The leaf, flower diameter and petal of 'VLR003' are smaller than those of 'Lemon Fizz'. The outer side of the flower bud of 'VLR003' is light green while that of 'Lemon Fizz' is dark green. The flower of 'VLR003' has a greater number of petals than that of 'Lemon Fizz'. The petal of 'VLR003' is elliptic in shape while that of 'Lemon Fizz' is obcordate. Excluding the basal spot, the inner side of the petal of 'VLR003' is yellow green throughout while that of 'Lemon Fizz' is yellow with lighter yellow towards the top. The basal spot on the inner side of the petal of 'VLR003' is very small while that of 'Lemon Fizz' is small. In longitudinal section, the hip of 'VLR003' is pitcher-shaped while that of 'Lemon Fizz' is pear-shaped.

Description:

PLANT: shrub growth type, semi upright growth habit, short during second flush, medium intensity of anthocyanin colouration of young shoot

STEM: medium number of yellowish prickles

YOUNG LEAFLET: medium intensity of anthocyanin colouration, weak undulation of margin
LEAF: medium sized
LEAF (UPPER SIDE): dark green, no anthocyanin colouration, weak degree of glossiness
TERMINAL LEAFLET BLADE: medium elliptic shape, obtuse base, acute apex

FLOWERING SHOOT: no flowering laterals, very few flowers
FLOWER BUD: elliptic shape, light green (RHS 144B)
FLOWER: semi-double type, yellow colour group, loose density of petals, star-shaped, flattened convex profile of upper and lower part, absent or weak fragrance, absent or very weak sepal extensions
PETAL: no reflexing of petals one-by-one, elliptic shape, absent or very weak incisions, absent or very weak reflexing of margin, absent or very weak undulation
PETAL (INNER SIDE): one colour evenly distributed throughout (basal spot excluded), when fully opened yellow green (RHS 4C)
BASAL PETAL SPOT (INNER SIDE): very small, medium yellow
PETAL (OUTER SIDE): light yellow (RHS 5D)
OUTER STAMEN: predominantly orange filament
SEED VESSEL: small at petal fall
HIP: pitcher-shaped in longitudinal section, orange at mature stage

Origin & Breeding History: The variety 'VLR003' originated from a cross conducted by the breeders Rumen Conev and Parminderjit Sandhu, employees of the Vineland Research and Innovation Centre, in Vineland, Ontario in 2011. The cross was made between the female parent variety 'Yellow Submarine' and male parent genotype 282. The rose variety 'VLR003' was planted in the rose hybrid block at Vineland Research and Innovation Centre during the summer of 2012. In 2013, the seedling was evaluated and selected based on plant architecture, semi-double yellow flowers that continuously bloom throughout the season, cold hardiness and moderate resistance to black spot and cercospora leaf spot disease. It was given the designation 'VLR003'. Initial cuttings were taken in the fall of 2013 and maintained in the greenhouse. Five clones were planted in the summer of 2014 at 9 other locations throughout Canada for multi-location trial evaluation.

Tests & Trials: The comparative trial of 'VLR003' was conducted as an outdoor container trial in the summer of 2021 at the Vineland Research and Innovation Centre in Vineland Station, Ontario. The trial included a total of 6 plants each of the candidate and reference variety. All plants were grown from bare-rooted plants, transplanted into 11 litre containers in April 2021. Observations and measurements were taken from 6 plants, or 10 parts of 6 plants, of each variety on August 12, 2021. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'VLR003' with reference variety 'Lemon Fizz'

Plant height during second flush (cm)

Leaf length (cm)

Leaf width (cm)

Colour of outer side of flower bud (RHS)

Petals per flower (#)

Flower diameter (cm)

Petal length (cm)

Petal width (cm)

Colour of inner side of petal, excluding basal spot (RHS)

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Rose: 'VLR003' (left) with reference variety 'Lemon Fizz' (right)

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Rose: 'VLR003' (left) with reference variety 'Lemon Fizz' (right)

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Rose: 'VLR003' (left) with reference variety 'Lemon Fizz' (right)