Comparisons of three popular rose (Rosa Hybrida L.) cultivars

Two-year-old Rosa hybrida L. 'Royalty', 'Emblem', and 'Samantha' plants were pinched on 20 October 1992 for a Christmas crop and on 28 December 1992 for a Valentine's Day crop. All temperature set points were 22C/17C day/night. At 10 and 25 days after pinch, and at flowering, 5 shoots from each bench location were destructively sampled for leaf (node) number, stem length, stem diameter, and fresh and dry weights of stem, leaves, flower bud, and total. Time to visible bud, to color, and to flower from pinch were recorded as were number of flowers and blind shoots produced. Results were tabulated; an analysis of variance showed that the three rose cultivars produced flowers that were not significantly different but did vary as far as numbers of flowers produced and stem length. Seasonality also produced some differences. Based upon an analysis of variance on the 1992 Christmas crop, the study found no significant differences for flowering times, but found differences in numbers of both flowers and blind shoots produced. Based upon an analysis of variance for the 1993 Valentine's Day crop, the study also found no significant differences for flowering times, but found differences in number of flowers, but not number of blind shoots, produced and in stem length. Based upon an analysis of variance comparing the three cultivars, with the Christmas and Valentine's Day crops combined, the study showed differences in number of flowers produced and stem length. Based upon an analysis of variance comparing the Christmas and Valentine's Day crops (all three cultivars combined), the study showed no difference in number of flowers produced, more blind shoots at Christmas, and a longer and heavier Valentine's Day flower, although flowers took longer to reach maturity.

Name thesis:degree_name

Master of Science (M.S.)

Level thesis:degree_level

Masters

Discipline thesis:degree_discipline

Horticulture

Grantor dc:publisher

Colorado State University. Libraries

Year dc:date.issued

1994

Authors dc:creator

• Story, Virginia S., author
• Hopper, Douglas A., advisor
• Brown, William M., Jr., committee member
• Stushnoff, Cecil, committee member

• Roses -- Varieties

Statement dc:rights

• Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.

Language dc:language.iso

eng, English

Identifier URI

https://doi.org/10.25675/3.024671

OAI record oai:identifier

https://api.mountainscholar.org/server/oai/request?verb=GetRecord&metadataPrefix=dim&identifier=oai%3Amountainscholar.org%3A10217%2F236146