STAT5A Lethality Allele Detection for Dairy Cattle Fertility
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Solution Overview
Problem
Current breeding technologies face challenges in improving reproductive performance and fertility in dairy cattle and other mammals due to the presence of lethal genetic factors, which are poorly understood and contribute to early embryonic death and decreased milk production.
Innovation Solution
Identification of a single nucleotide polymorphism (SNP) in the STAT5A gene associated with early embryo death, allowing for the development of methods to detect and manage this lethality allele, thereby improving reproductive performance and milk production by selecting suitable breeding stock.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If modern cattle breeding technologies are used to increase milk yield, then milk production is improved, but fertility performance deteriorates
Solution Approach 1:
The patent applies preliminary action by detecting the STAT5A gene polymorphism before breeding occurs. The method identifies animals carrying the lethal allele (G allele) and prevents mating between carriers, thereby preventing embryonic death before it happens. This proactive approach allows high-producing cows to maintain fertility by eliminating the genetic cause of reproductive failure rather than treating symptoms after they occur.
Solution Approach 2:
The patent implements feedback through genotyping analysis that provides information about an animal's genetic status. By determining the presence of the STAT5A polymorphism in breeding animals, the system feedbacks this genetic information to guide breeding decisions. This feedback loop enables selective breeding that maintains high milk production while preventing the transmission of lethal alleles, thus resolving the contradiction between productivity and reliability.
2Reliability
If systematic animal breeding programs are implemented to improve reproductive performance, then fertility is improved, but the complexity of breeding management increases
Solution Approach 1:
The patent applies the extraction principle by isolating and focusing on a specific genetic marker (STAT5A polymorphism) that is directly responsible for embryonic death. Instead of managing all possible genetic factors and environmental variables simultaneously, the method extracts and targets this single lethal allele. This simplification reduces breeding management complexity while maintaining improved reproductive performance, as the focus is narrowed to a specific actionable genetic target rather than comprehensive multi-factor management.
3Adaptability or versatility
If lethal genetic factors are present in the population, then genetic diversity is maintained, but embryonic survival rate deteriorates
Solution Approach 1:
The patent applies local quality by making a targeted intervention at a specific genetic locus (STAT5A gene) rather than attempting to manage all genetic variations uniformly. The method identifies and addresses the specific harmful allele (G allele) at this particular location in the genome while allowing other genetic diversity to remain. This localized approach preserves overall genetic diversity and adaptability of the population while specifically eliminating the factor responsible for embryonic death, thus resolving the contradiction between genetic diversity and embryonic survival.
Data Source
AI summary
Oligonucleic acid molecules comprising a SNP site at a position corresponding to position 7480 of the bovine signal transducer and activator of transcription (STAT5A) coding sequence (SEQ ID NO: 1). Also disclosed are an array or a kit comprising the same, a method for detecting the SNPs, a method for progeny testing of mammals, a method for increasing human and non-human mammal pregnancy rate in natural and artificial reproduction processes. Further provided are cattle breeding methods for improved milk production traits.