Rosa cultivar BOZMILLWIN winter hardiness and disease resistance

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Solution Overview

Problem

There is a need for new Rosa varieties that are winter hardy, resistant to diseases like powdery mildew and black spot, and exhibit unique ornamental characteristics such as pure white petal color, upright branching habit, and leathery shiny leaves, which are not met by existing varieties.

Innovation Solution

The development of the Rosa cultivar 'BOZMILLWIN' through a planned breeding program, combining traits from Rosa 'Pouldiram' and Rosa 'Adelaide Hoodless', resulting in a variety that is winter hardy to at least USDA Zone 2, resistant to powdery mildew and black spot, with pure white flowers, upright growth, and leathery shiny leaves, achieved through asexual reproduction by grafting onto Rosa corymbifera 'Laxa'.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If existing Rosa varieties are used, then they may have certain ornamental characteristics, but they lack winter hardiness and disease resistance

Engineering Contradiction:

Improvewinter hardiness and disease resistanceVSAvoidornamental characteristics

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent combines traits from two different Rosa parent varieties through controlled cross-breeding. The seed parent Rosa 'Pouldiram' contributes disease resistance and the pollen parent Rosa 'Adelaide Hoodless' contributes other desirable traits, merging them into a new cultivar that exhibits both winter hardiness and unique ornamental characteristics including pure white flowers and upright growth habit

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The breeding program selectively modifies key parameters of the Rosa cultivar including flower color (pure white), growth habit (upright), and disease resistance traits. Through multiple generations of selection and asexual reproduction, these parameters are stabilized to produce a cultivar with superior reliability while maintaining adaptability

Inventive Principle:

Principle #35Parameter changes

2Stability of the object's composition

If asexual reproduction by grafting is used, then the unique features are stable and reproduced true to type, but the process requires specific technical procedures

Engineering Contradiction:

Improvestability of unique featuresVSAvoidease of propagation

Core Design Contradiction:

Stability of the object's compositionVSEase of manufacture

Solution Approach 1:

The cultivar is first developed and stabilized through controlled cross-breeding and multiple generations of selection before propagation. The unique features are established and confirmed stable through preliminary asexual reproduction by budding and grafting, ensuring that the genotype is fixed before commercial propagation begins

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses Rosa corymbifera 'Laxa' as a rootstock for grafting the new cultivar. This intermediary rootstock provides a compatible base that ensures successful propagation while maintaining the stability of the scion's unique features, bridging the technical requirements for both stability and ease of manufacture

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUSPP28197P3<i>Rosa </i>plant named ‘BOZMILLWIN ’

Publication Date: 2017.07.18 TANJGA BILJANA BOZANIC

AI summary

A new and distinct Rosa cultivar named ‘BOZMILLWIN’ is disclosed, characterized by pure white flower petals, winter hardiness, very upright branching, leathery, shiny leaves and resistance to powdery mildew and black spot. The new variety is a Rosa, normally produced as an outdoor garden or container plant.