Morphological characterization of open cultivated floribunda roses (Rosa hybrida L.)
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Date
2016
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Punjab Agricultural University, Ludhiana
Abstract
The present studies entitled, “Morphological characterization of open cultivated floribunda roses (Rosa hybrida L.)” were carried out at the Research Farm, Department of Floriculture and Landscaping, Punjab Agricultural University, Ludhiana during the year 2014-2016. The vegetative and floral parameters of 20 floribunda cultivars planted under open conditions were recorded. The maximum plant height at pruning (141.50 cm) and at full bloom (148.17 cm) was observed in cultivar „Brown Velvet‟, however, the maximum plant spread (57.50 cm) was recorded in cultivar „Judi Garden‟. The maximum number of shoots per plant (45.67) was observed in cultivar „Brown Velvet‟. Most of the cultivars were having brown and purple coloured thorns and dark green foliage, however, cultivar „Summer Snow‟ was thornless. The maximum leaf length (11.90 cm) was observed in cultivar „Rumba‟ and maximum leaf breadth (11.00 cm) was observed in cultivar „Brown Velvet‟. The maximum days for visible bud (155.67 days) and bud formation (157.67 days) was observed in cultivar „White Junior Miss‟. The pointed form of bud was observed in 12 floribunda cultivars out of 20 cultivars. The maximum days for colour development (161.67 days) and opening of flower (167.67 days) were observed in cultivar „White Junior Miss‟. The maximum days for senescence (196.33 days) were observed in cultivar „Eureka‟. The maximum bud length (31.31 mm) was recorded in cultivar „White Queen Elizabeth‟ and the maximum bud diameter (15.26 mm) was recorded in the cultivar „Brown Velvet‟. The foliage glossiness was observed in nine floribunda rose cultivars out of 20 cultivars. Flower size was observed maximum in „White Queen Elizabeth‟ (11.40 cm) and the flower stem length was maximum in cultivar „Brown Velvet‟ (82.16 cm). Flower colour of the cultivars evaluated, varied from Red, Purple, Yellow to Orange group and among them 11 floribunda rose cultivars were found fragrant. The maximum vase life of flowers (8 days) was recorded in cultivars „Rumba‟ and „Charisma‟. The maximum pollen viability was observed in cultivar „Brown Velvet‟ (71.67 %) and maximum pedicle length was observed in cultivar „Banjaran‟ (11.76 cm). The cultivar „Sadabahar‟ was found to be susceptible to cold. The maximum duration of flowering (41 days) was observed in cultivars „Hot Cocoa‟, „Judi Garden‟ and „White Junior Miss‟. The maximum number of petals per flower was recorded in cultivars „Arunima‟ (66.33). The seed setting was observed in only five cultivars out of the total 20 floribunda cultivars of roses.
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