SNP-Based Polled Phenotype Selection in Cattle Breeding

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Solution Overview

Problem

Current methods for improving beef cattle productivity and reducing horn-related injuries are costly and inefficient, with classical breeding techniques requiring years of genetic evaluation and involving non-heritable methods like feed additives and hormonal implants, which face regulatory resistance and are not easily applicable.

Innovation Solution

The development of a method to identify and manage beef cattle using single nucleotide polymorphisms (SNPs) associated with the polled phenotype, allowing for breed-specific sub-grouping and predicting desirable traits like hornlessness through nucleotide sequence analysis and data storage systems.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If classical animal breeding techniques are used to select for polled phenotype, then heritable trait selection is achieved, but the process requires several years of genetic evaluation and is very expensive

Engineering Contradiction:

Improveheritable trait selection accuracyVSAvoidyears of genetic evaluation

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by using marker-assisted selection with SNPs located near the polled locus to predict the polled phenotype before traditional genetic evaluation is completed. This allows selection to begin earlier in the breeding process, reducing the time required to identify and select polled animals while maintaining selection accuracy.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent replaces the traditional mechanical system of phenotypic observation and performance recording with a molecular biology-based system using SNP genotyping. This substitution enables direct detection of genetic markers associated with the polled phenotype, eliminating the need for years of performance data collection and traditional breeding evaluations.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Productivity

If feed additives and animal hormonal implants are used to improve productivity, then short-term performance improvements are achieved, but regulatory resistance increases and methods are not heritable

Engineering Contradiction:

Improveanimal performance improvementVSAvoidregulatory acceptance and heritability

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The patent uses inexpensive SNP markers and genotyping technology as a permanent, heritable solution rather than relying on temporary, non-heritable management practices. The genetic markers provide a lasting change that can be passed to offspring, eliminating the need for continuous application of feed additives or hormonal implants and avoiding regulatory issues associated with these methods.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Object-affected harmful factors

If dehorning is performed to prevent horn-related injuries, then safety issues are addressed, but negative stress effects are imposed on the animal and animal welfare is compromised

Engineering Contradiction:

Improvehorn-related injuries and bruisingVSAvoidanimal stress and welfare impact

Core Design Contradiction:

Object-affected harmful factorsVSObject-generated harmful factors

Solution Approach 1:

The patent converts the harmful effect of horns into a beneficial outcome by selecting for the polled phenotype through marker-assisted selection. Instead of removing horns through dehorning, the approach uses genetic markers to identify and breed polled animals, eliminating horns entirely while avoiding the stress and welfare issues associated with dehorning procedures.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

4Productivity

If marker-assisted selection using SNPs is implemented, then selection efficiency and cost-effectiveness are improved, but knowledge of the causative gene remains unknown

Engineering Contradiction:

Improveselection efficiencyVSAvoidcausative gene identification

Core Design Contradiction:

ProductivityVSLoss of information

Solution Approach 1:

The patent uses SNP markers as intermediary elements that are linked to but not identical with the causative polled gene. These markers serve as proxies that can be detected and used for selection, providing a practical solution even when the exact causative gene and its mechanism remain unidentified. The markers are located near the polled locus and co-segregate with the polled phenotype, enabling effective selection without requiring complete genetic knowledge.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS8105776B2Breed-specific haplotypes for polled phenotypes in cattle

Publication Date: 2012.01.31 GENESEEK INC

AI summary

The presence of horns within commercial cattle populations increases the chances of injuries. The Polled (hornless) condition in cattle has existed since domestication, and it has been selected by breeders because of its economic importance and ease of management. A dominant mutation is believed to cause the polled phenotype. The present invention relates to the identification of breed-specific single nucleotide polymorphisms (SNPs) and their haplotypes, in the bovine genome, in or near gene(s) encoding polypeptides associated with the Polled phenotyped in beef production. The invention further encompasses methods and systems, including network-based processes, to manage the SNP data, haplotype data and other data relating to specific animals and herds of animals, veterinarian care, diagnostic and quality control data and management of livestock which, based on genotyping, have predictable productions quality traits, husbandry conditions, animal welfare, food safety information, audit of existing processes and data from field location.