Kentucky Bluegrass B-5.0815 Cultivar Tiller Density
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Solution Overview
Problem
There is a need for a new and distinct asexual perennial Poa pratensis L. cultivar that exhibits higher tiller density and forage production, as existing varieties do not meet these specific characteristics effectively.
Innovation Solution
The development of the 'B-5.0815' Kentucky bluegrass cultivar, which is identified by its unique vegetative characteristics, asexual reproduction through rhizome and tiller segments, and stable propagation, offering improved leaf production, panicle length, and adaptability across varying soil textures and pH levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing Kentucky bluegrass varieties are used, then the lawn is established, but the tiller density and forage production are insufficient
Solution Approach 1:
The patent applies parameter changes by selecting and propagating a specific cultivar (B-5.0815) that has been bred to exhibit superior tiller density and forage production characteristics. The cultivar was developed through controlled breeding programs that optimized genetic parameters for these traits, resulting in a plant variety that produces more tillers per unit area and higher forage yield compared to conventional varieties.
Solution Approach 2:
The patent employs copying through asexual propagation methods including rhizome division, tiller cutting, and stolons. These methods create genetic copies of the superior B-5.0815 cultivar that faithfully replicate the mother plant's high tiller density and forage production characteristics, allowing rapid expansion of the improved variety without introducing genetic variation that would dilute the desirable traits.
2Stability of the object's composition
If asexual reproduction methods are used, then propagation stability is improved, but genetic diversity is reduced
Solution Approach 1:
The patent utilizes asexual reproduction methods (rhizome division, tiller cutting, stolons) that create genetic copies of the B-5.0815 cultivar. These copying methods ensure propagation stability by producing clones that faithfully replicate the mother plant's superior traits, while the cultivar itself was developed through controlled breeding that introduced the necessary genetic diversity to achieve the desired characteristics.
Solution Approach 2:
The patent applies segmentation through the division of rhizomes into segments, each containing vegetative buds that can be rooted and propagated independently. This segmentation method maintains genetic stability by producing clones from discrete segments of the superior cultivar, while the overall breeding program that created the cultivar incorporated genetic diversity through controlled pollination and selection.
3Productivity
If the cultivar is propagated through successive generations, then population is increased, but trait stability may be compromised
Solution Approach 1:
The patent employs asexual propagation methods that create genetic copies, ensuring that traits are maintained stably across generations. The rhizome division, tiller cutting, and stolon propagation methods all produce clones that faithfully replicate the mother plant's characteristics, preventing the dilution or alteration of superior traits even as the population increases through repeated propagation cycles.
Solution Approach 2:
The patent utilizes the plant's natural self-service propagation capabilities through rhizome and tiller fragmentation, as well as apomictic caryopses. These self-service mechanisms allow the cultivar to reproduce without external intervention, maintaining trait stability through clonal propagation while enabling population expansion. The apomixes level of approximately 90% confirms the predominance of asexual reproduction that preserves genetic integrity across generations.
Data Source
AI summary
A variety of Kentucky bluegrass produced vegetatively by rhizomes, tillers and apomictic caryopses, distinguished by a unique combination of characters including coarse leaf blade width and high dry matter yield under grazing.