Bovine Embryo Selection via TGF-β Gene Expression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The dairy cattle industry faces significant economic losses due to reproductive deterioration in high-producing dairy cows, primarily attributed to low fertilization rates and early embryonic mortality during pre-implantation embryo development, where identifying specific genetic factors affecting fertility has been challenging due to inaccurate data and low heritability of these traits.
Innovation Solution
The method involves assessing the expression profiles of TGF-β pathway genes in cattle embryos using quantitative real-time PCR to identify genetic markers associated with fertility traits, specifically targeting DNA-binding protein inhibitor 3 (ID3) and bone morphogenetic protein 4 (BMP4), and using these markers to select embryos for implantation based on their expression levels to ensure proper pre-implantation development.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If intensive selection for production traits is made to ensure high productivity, then productivity is improved, but reproductive performance deteriorates
Solution Approach 1:
The patent changes the selection parameters from purely production-based traits to include genetic markers associated with reproductive performance. By using molecular genetic methods to assay for specific genetic markers (such as those in the TGF-β signaling pathway), the selection process now considers both productivity and reproductive capability, thereby resolving the contradiction between improved milk production and maintained reproductive performance.
2Measurement precision
If genetic testing for fertility is performed, then embryo selection accuracy is improved, but testing complexity increases
Solution Approach 1:
The patent extracts specific genetic markers from the complex genome that are directly associated with fertility and reproductive performance. By focusing only on these relevant markers (such as genes in the TGF-β pathway) rather than analyzing the entire genome, the testing method achieves high measurement precision while keeping the procedure relatively simple and manageable.
3Manufacturing precision
If embryo gene expression analysis is performed to assess viability, then embryo selection quality is improved, but analysis time increases
Solution Approach 1:
The patent performs gene expression analysis at the pre-implantation embryo stage, before implantation occurs. By conducting the analysis at this early preliminary stage using molecular genetic methods, the embryo selection quality is improved while minimizing time loss, as the testing is done before the embryo would naturally be implanted or discarded.
Data Source
AI summary
Arrays of nucleic acid molecules, kits, methods of genotyping and marker assisted bovine breeding methods based on novel SNPs on genes of the bovine transforming growth factor-β (TGF-β) signaling pathway for improved bovine fertilization rate. The methods and compositions of the present invention are related to SNPs in the DNA-binding protein inhibitor 3 (ID3) gene, and in the bone morphogenetic protein 4 (BMP4) gene corresponding to position 2702 of SEQ ID NO: 2. Also disclosed are methods for determining viability of developing bovine embryos by measuring the expression level of one or more target genes in the TGF-signaling pathway, and selecting for implantation only embryos whose target gene expression level is not up-regulated.