Genotype Profiles for the Quantitative Trait Related to Milk Composition in Bulls Used for Artificial Insemination in India

Mukhopadhyaya, Pratap N.; Mehta, H. H.

doi:10.5713/ajas.2002.326

Cited by 2 publications

(2 citation statements)

References 14 publications

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“…However, ambiguous evidence has been reported regarding the association of κ-casein (κ-CN) and βlactoglobulin (β-LG) genotypes with milk yield and composition (Ng Kwai Hang et al, 1990, Mukhopadhyaya andMehta, 2002). Despite these contradictory results, several reports (Lin et al, 1986, Cerbulis andFarrell, 1974) suggest that κ-CN B allele and β-LG A allele have desirable effects on milk yield in the first lactation in Holstein cattle.…”

Section: Introductionmentioning

confidence: 99%

The Relation between Genetic Polymorphism Markers and Milk Yield in Brown Swiss Cattle Imported to Slovakia

Chrenek¹,

Huba²,

Vašíček³

et al. 2003

Asian Australas. J. Anim. Sci

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The aim of this study was to determine genotypes of four genetic markers and to investigate their association with milk production traits in Brown Swiss cattle imported to Slovakia. The bovine κ-casein, β-lactoglobulin, growth hormone and prolactin genotypes of 107 cows were identified by polymerase chain reaction. Effects all four genetic markers on milk, fat, protein and lactose yields and fat, protein and lactose percentage were estimated from a data set of 249 lactations. The frequency of desirable B allele of κcasein gene to milk production was 0.46, alleles A of β-lactoglobulin gene was 0.55, allele and L of growth hormone gene was 0.45 and allele A and B of bovine prolactin gene were 0.61 and 0.39. The results of milk production obtained in our work showed that BB genotypes of κ-CN gene, AA genotypes of β-LG gene, LL genotypes of bGH gene were significantly associated with better milk production traits, mainly about the fat content. Association of a bovine prolactin genotypes with milk production were not found.

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Section: Introductionmentioning

confidence: 99%

The Relation between Genetic Polymorphism Markers and Milk Yield in Brown Swiss Cattle Imported to Slovakia

Chrenek¹,

Huba²,

Vašíček³

et al. 2003

Asian Australas. J. Anim. Sci

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“…Bovine mastitis, one of the most significant diseases in livestock industries, has been a subject of many researchers' studies as milk has been because it has caused much pecuniary loss to farmers (Kalorey et al, 2001;Shem et al, 2001;Dhaka et al, 2002;Mukhopadhyaya and Mehta, 2002;Shem et al, 2002;Mukherjee and Dash, 2003). Endeavors to select individuals genetically resistant to mastitis were taken as a line in the chain of these studies, The primers used in this study amplified the exact size of NRAMP1, and digested product was also revealed expected products.…”

Section: Discussionmentioning

confidence: 99%

Comparison of Natural Resistance-Associated Macrophage Protein (NRAMP)1 Expression between Cows with High and Low Milk Somatic Cells Counts

Joo¹,

Moon²,

Fox³

et al. 2003

Asian Australas. J. Anim. Sci

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Studies using natural resistance-associated macrophage protein (NRAMP) identification indicated that cattle could be selected for immunity. Several studies performed on intracellular organisms such as Mycobacterium, Salmonella, Brucella and Leishmania in human and mouse revealed that resistance against these bacteria was dependent on high activity of NRAMP1 in macrophages. However, hardly any researches have been done on Staphylococcus aureus in bovine mastitis, which is an intracellular organism and the main cause of bovine mastitis. The objectives of this study were to establish reverse transcriptase polymerase chain reaction (RT-PCR) methods, through which NRAMP1 mRNA expression could be compared and analyzed between mastitis-resistant and -susceptible cows. NRAMP1 gene and its expression were investigated using 20 cows (Holstein Friesian) in Korea. Cows were evenly split into two groups, with and without histories of clinical mastitis. Equivalent numbers of cows were randomly selected from each group. Monocytes were isolated from the bovine peripheral blood of each selected cows and activated with lipopolysaccharide (LPS). mRNA was separated from the monocytes and cDNA of NRAMP1 was synthesized and amplified using RT-PCR with amplification of β-actin as a control. The difference in NRAMP1 expressions of mastitis-resistant (n=10) and -susceptible (n=10) Holstein cows was analyzed. Results demonstrate that resistant cows produced more NRAMP1 mRNA than the susceptible ones, and ratios of NRAMP1:β-actin expression were higher in resistant cows with or without LPS activation. Therefore, this study could be applied to select bovine mastitis resistant cows before infection based on the expression of NRAMP1.

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Genotype Profiles for the Quantitative Trait Related to Milk Composition in Bulls Used for Artificial Insemination in India

Cited by 2 publications

References 14 publications

The Relation between Genetic Polymorphism Markers and Milk Yield in Brown Swiss Cattle Imported to Slovakia

The Relation between Genetic Polymorphism Markers and Milk Yield in Brown Swiss Cattle Imported to Slovakia

Comparison of Natural Resistance-Associated Macrophage Protein (NRAMP)1 Expression between Cows with High and Low Milk Somatic Cells Counts

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