Smooth Zest One Nectarine Tree Early Ripening Chilling Requirement

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Solution Overview

Problem

Nectarine tree varieties require significant chilling units for dormancy, limiting early-season fruit production in low to medium chill zones, and existing varieties do not consistently ripen before mid-May in these regions.

Innovation Solution

The 'Smooth Zest One' nectarine tree, developed through controlled and hybrid crosses at Texas A&M University, requires 200-250 chilling units and produces firm, white-fleshed clingstone fruit that ripens early, typically in the first half of May, outperforming other varieties like 'Flordaking' and 'Smooth Delight One' in medium chill zones.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If nectarine tree varieties require significant chilling units for dormancy, then they can maintain proper dormancy cycles, but early-season fruit production is limited and ripening occurs later in the season

Engineering Contradiction:

Improvedormancy cycle reliabilityVSAvoidearly-season fruit production

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent applies parameter changes by breeding a nectarine variety with modified chilling requirements. 'Smooth Zest One' requires only 200-250 chilling units compared to the typical 800-1000 units required by conventional varieties. This parameter change in chilling requirement enables the tree to complete dormancy and transition to fruit production much earlier in the season, allowing commercial harvesting in the first half of May in low to medium chill zones, thereby resolving the contradiction between maintaining reliable dormancy cycles and achieving early-season productivity

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If nectarine varieties have high chilling requirements, then they adapt to traditional growing zones, but they cannot ripen fruit before mid-May in low to medium chill zones

Engineering Contradiction:

Improvegrowing zone adaptabilityVSAvoidtime to fruit ripening

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent utilizes parameter changes by fundamentally altering the chilling requirement parameter of the nectarine variety. 'Smooth Zest One' was bred to require only 200-250 chilling units, enabling it to adapt to low to medium chill zones (Texas, Florida, California) and ripen fruit in the first half of May, significantly reducing the time loss compared to conventional varieties that cannot ripen before mid-May in these regions

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent applies dynamics by creating a variety that dynamically adapts to varying chill zone conditions. The reduced chilling requirement allows the tree to flexibly respond to warmer winter conditions in low to medium chill zones, adjusting its dormancy-period relationship to achieve early fruit set and ripening, thereby overcoming the temporal limitation of traditional high-chill varieties

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUSPP28202P3Nectarine tree named ‘Smooth Zest One’

Publication Date: 2017.07.18 TEXAS A&M UNIVERSITY

AI summary

Disclosed is a new nectarine variety of Prunus persica named ‘SMOOTH ZEST ONE’. This new variety, which requires 200-250 chilling units of dormancy, is considered to be a nectarine tree of early season maturity, which ripens in early to mid May in the medium chill zone of Texas and produces white fleshed fruit that are firm, attractively colored, and suitable for both local and regional fresh fruit markets.