C-7 Bermuda Grass Hybrid for Cold Hardiness and Low Maintenance
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Solution Overview
Problem
Existing Bermudagrass varieties lack superior cold hardiness, fine leaf texture, and reduced seed-head production, making them unsuitable for hot-humid and transition zones, and requiring frequent maintenance due to scalping issues.
Innovation Solution
The development of the Cynodon dactylon L.×Cynodon transvaalensis L. variety 'C-7', also known as Sunday, which features a fine leaf texture, dense canopy, reduced inflorescence production, and enhanced cold hardiness, with a deep and long root system, suitable for vegetative reproduction and adapted for hot-humid and transition zones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing Bermudagrass varieties are used, then they can grow in hot-humid zones, but they lack superior cold hardiness and fine leaf texture
Solution Approach 1:
The patent combines two different Bermudagrass species (Cynodon dactylon and Cynodon transvaalensis) through hybridization to create a new variety 'C-7' that merges the desirable traits of both parent species, including improved cold hardiness from C. transvaalensis and fine leaf texture from C. dactylon, resolving the contradiction between adaptability and performance stability
Solution Approach 2:
The patent changes the genetic parameters of the Bermudagrass variety by selecting and propagating a specific hybrid genotype ('C-7') that exhibits superior cold hardiness ratings (6a-7b USDA zones) compared to parent varieties, while maintaining the fine leaf texture parameter through controlled vegetative reproduction
2Productivity
If existing Bermudagrass varieties are used, then they can provide turf coverage, but they produce excessive seed-heads and require frequent maintenance
Solution Approach 1:
The patent extracts and eliminates the inflorescence production trait from the Bermudagrass variety by selecting for reduced seed-head formation in the hybrid 'C-7', which produces minimal to no inflorescences compared to parent varieties that produce excessive seed-heads, thereby reducing maintenance requirements without compromising turf coverage
Solution Approach 2:
The patent employs vegetative reproduction methods (sprigs, rhizomes, plantlets, or sod) that allow the variety to propagate and establish turf coverage without requiring seed production and associated maintenance, enabling the grass to serve itself through clonal propagation while maintaining consistent desirable traits
3Reliability
If existing Bermudagrass varieties are used, then they can establish turf, but they suffer from scalping issues and lack dense canopy
Solution Approach 1:
The patent applies local quality by developing a variety with non-uniform yet desirable characteristics: very fine leaf texture (0.5-1.0 mm width) combined with dense canopy structure, where the fine leaves create a uniform appearance while the dense root and shoot system prevents scalping, resolving the contradiction between turf establishment reliability and canopy shape
Data Source
AI summary
A new and distinct variety of Ultra-dwarf Bermuda grass named ‘C-7’ having a distinctive and unique combination of several characteristics such as: narrow and long leaf blade, deep and long root system, fine texture and dense canopy, uniform light green color, little requirements for maintenance, little inflorescence production and improved cold hardiness.