Sweet Cott 3 Tangor Gamma Irradiation Late Ripening
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Solution Overview
Problem
The Citrus industry faces market supply congestion due to narrow maturity windows of conventional varieties, leading to lower sell prices, and there is a need for new varieties with late ripening times, reduced seediness, and improved agronomical and organoleptic features.
Innovation Solution
A new tangor tree variety, 'Sweet Cott 3', was developed by gamma irradiating the 'AS-2' variety to enhance late ripening, reduce seediness, and improve organoleptic quality, characterized by less fruit drop, lower seed count, better fruit size, and resistance to heat and frost, achieved through asexual reproduction using bud-grafting on Volkamer lemon root-stock.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional Citrus varieties are planted, then market supply is increased, but maturity windows are narrow causing supply congestion and lower prices
Solution Approach 1:
The patent changes the temporal parameter of maturity by developing late-maturing Citrus varieties through selective breeding and gamma irradiation treatment. This extends the harvesting period beyond traditional maturity windows, allowing staggered market supply and reducing congestion while maintaining productivity.
Solution Approach 2:
The patent employs preliminary gamma irradiation treatment of budwood before grafting to induce desirable traits such as extended maturity time and reduced seediness. This preliminary action on the plant material ensures the resulting varieties have improved temporal distribution characteristics for market supply.
2Loss of time
If late maturing varieties are developed, then maturity window is extended, but seediness increases
Solution Approach 1:
The patent applies gamma irradiation treatment to change the genetic parameters of the Citrus varieties, simultaneously achieving extended maturity time and reduced seediness. This parameter change approach allows both desired traits to be improved together rather than trading one for the other.
Solution Approach 2:
The patent converts the potentially harmful effect of gamma irradiation (which can cause genetic instability) into a beneficial outcome by carefully selecting and stabilizing lines that show reduced seediness and extended maturity. The irradiation treatment, while carrying risks, ultimately produces varieties with improved organoleptic and agronomic characteristics.
3Quantity of substance
If gamma irradiation is applied to budwood, then late ripening and reduced seediness are achieved, but treatment complexity is increased
Solution Approach 1:
The patent uses an intermediary approach by establishing a dedicated nursery facility with controlled irradiation capabilities as a mediator between the breeding program and field deployment. This intermediary infrastructure consolidates the complex irradiation and selection process, making the overall program more manageable despite the added complexity of radiation treatment.
4Stability of the object's composition
If asexual reproduction through bud-grafting is used, then variety characteristics are maintained, but root-stock dependency is increased
Solution Approach 1:
The patent applies local quality by selecting specific root-stock varieties (such as Volkamer lemon) that possess desirable traits like disease resistance and adaptability to local conditions, while maintaining the scion varieties' distinctive characteristics through asexual reproduction. This creates a localized optimization where each component serves its specific function optimally.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The 'Sweet Cott 3' variety exhibits distinct characteristics such as earlier ripening, lower seediness, and increased fruit load, with improved tolerance to heat waves and frost, and resistance to Ceratitis capitata damage, addressing market supply issues and enhancing fruit quality and yield.
Implementation Method 1
Budwood of this unique tree was gamma irradiated in 2013 using a Cobal-60 panoramic irradiator
Data Source
AI summary
A new and distinct tangor tree characterized by less sensitivity to fruit drop due to heat wave, no alternate bearing, very low seed count, low viable pollen, better fruit size, smooth rind, less fruit drop at full maturity and rare Ceratitis capitata damage on the fruit.