Rosa hybrida ESM R202 Rose Breeding for Longevity
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Solution Overview
Problem
Current cut flower Rose varieties often lack attractive flowers and excellent postproduction longevity, with limited breeding focused on these specific traits.
Innovation Solution
The development of Rosa hybrida 'ESM R202' through controlled cross-pollination, exhibiting upright and strong flowering stems, vigorous growth, dark green leaves, yellow flowers with light red margins, high productivity, and exceptional postproduction longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional breeding methods are used for cut flower Roses, then variety development is possible, but postproduction longevity and flower attractiveness are not sufficiently improved
Solution Approach 1:
The patent applies parameter changes by systematically varying breeding parameters including selecting specific parent lines with complementary traits, controlling pollination timing, and selecting progeny based on multiple criteria (flower longevity, attractiveness, growth habit). This methodical parameter optimization enabled the development of 'ESM R202' with superior postproduction longevity of 21 days while maintaining high productivity with 13-14 flowering stems per plant per year.
2Reliability
If breeding focuses on flower attractiveness, then attractive flowers are produced, but postproduction longevity is not sufficiently improved
Solution Approach 1:
The patent merges two previously separate breeding objectives into a single unified variety. The female parent (Line 95) contributed excellent postproduction longevity and the male parent (Line 222) contributed attractive flower characteristics. Through controlled cross-pollination and selective breeding, the patent combined these traits in 'ESM R202', achieving both 21-day postproduction longevity and high flower attractiveness with yellow petals and light red margins.
3Reliability
If breeding programs aim for multiple traits simultaneously, then comprehensive improvement is possible, but breeding complexity increases
Solution Approach 1:
The patent applies local quality by assigning specific trait optimization to each parent line, reducing overall breeding complexity. The female parent (Line 95) was selected and bred primarily for postproduction longevity and stem strength, while the male parent (Line 222) was optimized for flower attractiveness and color. This division of breeding focus allowed simultaneous improvement of multiple traits without overwhelming program complexity.
Data Source
AI summary
A new and distinct cultivar of Rose plant named ‘ESM R202’, characterized by its upright and strong flowering stems; vigorous growth habit and high productivity; dark green-colored leaves; yellow-colored flowers with light red-colored margins that are held on strong and long flowering stems within relatively large sprays; freely flowering habit with typically about eight flowers per spray and good productivity with about 13 to 14 flowering stems per plant produced per year; and excellent postproduction longevity.