Morphogenic Gene Combinations for Faster Dicot Somatic Embryogenesis

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Solution Overview

Problem

Current methods for generating somatic embryos in dicot plants are laborious, time-consuming, and inefficient, particularly for commercially relevant varieties that are recalcitrant to traditional culture methods, and Agrobacterium-mediated transformation protocols face challenges such as malformation and high labor intensity.

Innovation Solution

The use of combinations of heterologous morphogenic genes, including BBM, LEC, RKD, and LEC polypeptides, expressed in dicot explants to induce somatic embryo formation, followed by transformation methods using Agrobacterium or biolistic techniques, which can include site-specific recombinases to excise these genes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If traditional culture methods are used for somatic embryogenesis in dicot plants, then transformation can be achieved, but the process is laborious, time-consuming (4-5 months), and inefficient

Engineering Contradiction:

Improvetransformation efficiencyVSAvoidtime required

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent applies parameter changes by modifying the genetic composition of the explant through introduction of heterologous morphogenic genes (BBM, LEC, RKD). This genetic parameter change enables somatic embryogenesis in recalcitrant dicot varieties that cannot form somatic embryos through traditional culture methods alone, thereby accelerating the transformation process and improving productivity

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements preliminary action by introducing morphogenic genes into the explant before the somatic embryogenesis process. This pre-treatment with heterologous genes prepares the explant to readily form somatic embryos when combined with Agrobacterium transformation, eliminating the need for lengthy traditional culture protocols and reducing the overall time required

Inventive Principle:

Principle #10Preliminary action

2Productivity

If traditional culture methods are used, then transformation is possible, but the process is very labor intensive

Engineering Contradiction:

Improvetransformation throughputVSAvoidlabor intensity

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The patent applies self-service by enabling the explant to autonomously form somatic embryos through the action of introduced morphogenic genes without requiring extensive manual intervention. The heterologous genes (BBM, LEC, RKD) self-regulate the embryogenesis process, reducing the need for labor-intensive culture manipulations and increasing transformation throughput

Inventive Principle:

Principle #25Self-service

3Reliability

If traditional methods are used for recalcitrant dicot varieties, then transformation can occur, but plant malformation and poor shoot formation occur

Engineering Contradiction:

Improveplant formation qualityVSAvoidtransformation success rate

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent applies parameter changes by introducing specific morphogenic genes (BBM, LEC, RKD) that correct the developmental parameters of recalcitrant varieties. These genes modify the genetic parameter of the explant to enable proper somatic embryo formation and subsequent plant regeneration, improving both the quality and success rate of transformation in previously recalcitrant dicot species

Inventive Principle:

Principle #35Parameter changes

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

This approach significantly reduces the time required to generate transgenic dicot plants, often by weeks or months, and facilitates the production of somatic embryos in a simpler, faster, and more cost-effective manner, enabling higher throughput transformation and expanding the range of transgenic plants available.

Implementation Method 1

expressing in a dicot explant: (i) a first heterologous nucleotide sequence encoding a Babyboom (BBM) or a RWP-RK domain (RKD) polypeptide and (ii) a second heterologous nucleotide sequence encoding a leafy cotyledon (LEC) polypeptide

Methodology Applied

Scientific EffectGenetic expression:

Implementation Method 2

Agrobacterium-mediated transformation remains a widely used approach in experimental and, in some cases, commercial development of dicot species

Methodology Applied

Scientific EffectAgrobacterium-mediated transformation:

Implementation Method 3

which can include site-specific recombinases to excise these genes

Methodology Applied

Scientific EffectSite-specific recombination:

Data Source

PatentUS20250270265A1Compositions and methods for somatic embryogenesis in dicot plants

Publication Date: 2025.08.28 PIONEER HI BREED INTERNATIONAL INC

AI summary

Methods are provided for producing dicot somatic embryos, including for transformation and regenerating transgenic plants from the somatic embryos.