Related Experiment Video
Updated: May 3, 2026
05:48
Removal of an Internal Translational Start Site from mRNA While Retaining Expression of the Full-Length Protein
Published on: March 16, 2022
2.0K
Kappa casein gene polymorphism in local Tunisian goats
B Jemmali1, A Ben Gara1, H Selmi2
1Department of Animal Production, School of Higher Education in Agriculture of Mateur, Tunisia.
Pakistan Journal of Biological Sciences : PJBS
|February 13, 2014
Summary
Genetic analysis of goat Kappa casein in Tunisian breeds revealed distinct allelic variants. This genetic polymorphism information aids in the improvement and conservation of local goat populations.
Area of Science:
- Animal Genetics
- Molecular Biology
- Dairy Science
Background:
- The Kappa casein gene is crucial for milk production and quality in goats.
- Understanding genetic diversity is essential for effective livestock breeding programs.
Purpose of the Study:
- To investigate the genetic polymorphism of the goat Kappa casein gene in Tunisian local breeds.
- To identify allelic variants and genotypic frequencies for conservation and improvement strategies.
Main Methods:
- Genomic DNA was extracted from 175 Tunisian dairy goats.
- Polymerase Chain Reaction (PCR) amplified target gene regions.
- PCR-Restriction Fragment Length Polymorphism (PCR-RFLP) using Alw44I endonuclease characterized single nucleotide polymorphisms.
Main Results:
- Two Kappa casein genotypes (AA/BB and CC) and one heterozygous genotype (AC/BC) were identified.
- Genotypic frequencies were 12.5% (AA/BB), 60.5% (CC), and 27% (AC/BC).
- The PCR-RFLP analysis yielded specific DNA fragment patterns (459 bp and 381 bp) upon enzyme digestion.
Conclusions:
- The study identified significant Kappa casein genetic variants in Tunisian goats.
- These findings provide valuable data for selective breeding to enhance milk production and conserve local goat genetic resources.
Related Concept Videos
01:39Epistasis
37.3K
In addition to multiple alleles at the same locus influencing traits, numerous genes or alleles at different locations may interact and influence phenotypes in a phenomenon called epistasis. For example, rabbit fur can be black or brown depending on whether the animal is homozygous dominant or heterozygous at a TYRP1 locus. However, if the rabbit is also homozygous recessive at a locus on the tyrosinase gene (TYR), it will have an unshaded coat that appears white, regardless of its TYRP1...
37.3K
01:09Epistasis Analysis
4.9K
Although Mendel chose seven unrelated traits in peas to study gene segregation, most traits involve multiple gene interactions that create a spectrum of phenotypes. When the interaction of various genes or alleles at different locations influences a phenotype, this is called epistasis. Epistasis often involves one gene masking or interfering with the expression of another (antagonistic epistasis). Epistasis often occurs when different genes are part of the same biochemical pathway. The...
4.9K
01:43Incomplete Dominance
19.0K
Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
19.0K
01:05Single Nucleotide Polymorphisms-SNPs
14.6K
A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
14.6K
03:06From DNA to Protein
20.7K
The flow of genetic information in cells from DNA to mRNA to protein is described by the central dogma, which states that genes specify the sequence of mRNAs, which in turn specify the sequence of amino acids making up all proteins. The decoding of one molecule to another is performed by specific proteins and RNAs. Because the information stored in DNA is so central to cellular function, it makes intuitive sense that the cell would make mRNA copies of this information for protein synthesis...
20.7K
01:25Genetic Variation
1.7K
Genetic variation is the diversity in DNA sequences found among individuals of the same species. This diversity is crucial for a species' survival because it helps organisms adapt to environmental changes. Genetic variation begins with fertilization, where an egg and sperm cell merge. Each of these cells carries 23 chromosomes, up to 46 in the fertilized egg. Chromosomes are long DNA strands that contain genes, the basic units of heredity.
Genes exist in different versions called alleles,...
Genes exist in different versions called alleles,...
1.7K