PAC 941 Plum Almond Hybrid Rootstock Adaptation

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Solution Overview

Problem

Existing plum and peach rootstocks face challenges with nematode resistance, sucker formation, soil adaptation, and labor costs in limited soil conditions, particularly with high lime content and waterlogging.

Innovation Solution

The development of the Plum Almond Tree hybrid 'PAC 941', which exhibits superior root anchorage, reduced sucker formation, and compatibility with multiple Prunus species, offering improved adaptation to poor soils and resistance to nematodes, achieved through in vitro propagation and field trials.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If traditional plum or peach rootstocks are used, then they are compatible with commercial varieties, but they have poor adaptation to calcareous soils with high lime content causing iron chlorosis

Engineering Contradiction:

ImproveAdaptation to calcareous soilsVSAvoidIron chlorosis

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent combines plum (Prunus cerasifera) and almond (Prunus dulcis) species to create a hybrid rootstock that merges the soil adaptability of plum with the tolerance to calcareous soils of almond, resulting in a rootstock that resists iron chlorosis while maintaining compatibility with commercial Prunus varieties

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The hybrid rootstock represents a composite genetic material combining traits from two different Prunus species, creating a new genetic composition that exhibits superior adaptation to calcareous soils and resistance to iron chlorosis compared to pure plum or peach rootstocks

Inventive Principle:

Principle #40Composite materials

2Ease of operation

If traditional plum rootstocks are used, then they are widely grown and compatible, but they form excessive suckers requiring significant labor for control

Engineering Contradiction:

ImproveLabor requirements for sucker controlVSAvoidSucker formation

Core Design Contradiction:

Ease of operationVSObject-generated harmful factors

Solution Approach 1:

The hybrid rootstock extracts and eliminates the undesirable sucker-forming trait from traditional plum rootstocks while retaining the desirable features of wide compatibility with commercial varieties and adaptability to various soil conditions

Inventive Principle:

Principle #2Taking out (Extraction)

3Reliability

If traditional rootstocks are used in replant situations, then they are commonly available, but they have poor root anchorage and shallow root systems

Engineering Contradiction:

ImproveRoot anchorageVSAvoidRoot system depth

Core Design Contradiction:

ReliabilityVSLength of stationary object

Solution Approach 1:

The hybrid rootstock changes the root system parameters by developing deeper and more extensive root architecture compared to traditional plum rootstocks, improving both root anchorage reliability and vertical root penetration depth for better water and nutrient uptake

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUSPP21556P3Plum almond tree named `PAC 941`

Publication Date: 2010.12.07 AGROMILLORA IBERIA

AI summary

A new and distinct plum almond hybrid cultivar for rootstock use that originated as a pollinated seedling as provided. This new invention (cultivar) is particularly well suited for use as a plum, peach, nectarine, apricot and almond rootstock. It is found that this new invention (cultivar) exhibits good root anchorage as well as a significantly reduced tendency to form unwanted suckers.