Geranium TOSTD0460 Heat Tolerance Breeding
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Solution Overview
Problem
Current Geranium cultivars lack heat tolerance and exhibit insufficient vigor and attractive flower coloration, particularly in semi-double types with deep reddish-purple flowers and medium green foliage, which are not adequately addressed by existing varieties.
Innovation Solution
A new cultivar, Pelargonium x hortorum 'TOSTD0460', resulting from controlled breeding, exhibits semi-double deep reddish-purple flowers, medium green foliage with zonation, and a vigorous, upright-mounded growth habit, combining traits from TB0378 and Eco Neon Rose parents, demonstrating improved heat tolerance and vigor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing Geranium cultivars are used, then they are commercially available and easy to obtain, but they lack heat tolerance and exhibit insufficient vigor and attractive flower coloration
Solution Approach 1:
The patent applies parameter changes by developing a new cultivar with modified genetic parameters that confer heat tolerance while maintaining or enhancing flower coloration and growth vigor. The breeding process selected for specific phenotypic parameters including deep reddish-purple flower color, medium green foliage with zonation, and vigorous upright-mounded growth habit, thereby changing the biological parameters of the Geranium plant to resolve the contradiction between reliability under heat stress and adaptability in terms of aesthetic and growth properties
2Shape
If the female parent TB0378 is used, then semi-double type and dark hot pink flowers are achieved, but low growth vigor is exhibited
Solution Approach 1:
The patent applies merging by crossing the female parent TB0378 (which contributes semi-double flower type and dark hot pink coloration) with the male parent Eco Neon Rose 'Genedona' (which contributes vigorous upright-mounded growth habit). The offspring 'TOSTD0460' merges these parental traits, achieving both the desired flower characteristics and improved growth vigor, thereby resolving the contradiction between flower quality and growth productivity
3Productivity
If the male parent Eco Neon Rose 'Genedona' is used, then vigorous growth habit is achieved, but flower coloration is not sufficiently deep reddish-purple
Solution Approach 1:
The cross between male parent Eco Neon Rose 'Genedona' and female parent TB0378 merges the vigorous growth habit from the male parent with the deep reddish-purple flower coloration from the female parent. The resulting cultivar 'TOSTD0460' exhibits both traits simultaneously, resolving the contradiction between productivity (growth vigor) and shape (flower coloration) through hybridization
4Ease of manufacture
If similar cultivar Big Ezee Fuchsia Blue is used, then commercial availability is maintained, but flower color has less reddish-purple tone and fewer petals
Solution Approach 1:
The patent applies parameter changes by developing a distinct cultivar with modified floral parameters compared to the similar cultivar Big Ezee Fuchsia Blue. The new cultivar exhibits deeper reddish-purple flower color (different color intensity and hue parameters) and increased petal number, while maintaining commercial viability through controlled breeding and true-to-type propagation, thereby resolving the contradiction between ease of commercial production and superior floral shape parameters
Data Source
AI summary
A new and distinct cultivar of Geranium plant named ‘TOSTD0460’, characterized by its semi-double type, deep reddish-purple colored flowers, medium green-colored foliage with zonation, and vigorous, upright-mounded growth habit, is disclosed.