Relationship between gene polymorphism and milk production traits in Teleorman Black Head sheep breed
Journal Title: Revista MVZ Cordoba - Year 2016, Vol 21, Issue 1
Abstract
Objective. This study is a preliminary step of a larger national program aimed to develop a strategy for “in situ” preservation of Teleorman Black Head sheep population. In this paper we estimated the effect of β-lactoglobulin, casein and prolactin on some quantitative and qualitative milk traits in this local sheep population. Material and methods. Genotyping methodology included PCR for CSN3 (A and B alleles) and PCR-RFLP for LGB (A and B alleles) and PRL (T and C alleles), respectively. Repeated milking and milk composition analysis were used for the polymorphism effect estimation. Results. No association between CSN3 polymorphism and milk traits was found. Effect of LGB on production traits was quite constant. Genotype AA performed better than BB. PRL marker effect showed small differences than LGB. Concerning milk, fat and protein yield, AA genotype for PRL had a smaller positive impact than AA genotype for LGB. Regarding fat and protein content, PRL showed a negative effect for AA and positive for BB genotype, respectively. Conclusions. Positive association between LGB and milk yield and composition recommend this candidate gene like marker for a future MAS program. Although PRL gene is also associated with an increased milk quantity, inverse response over milk composition must be considered in MAS strategy. Our study demonstrated that both LGB and PRL markers could became an advent of MAS utilization in Romanian dairy sheep breeding industry.
Authors and Affiliations
Gras MA, Ph. D *| National Research-Development Institute for Biology and Nutrition, Animal Biology Laboratory, Calea Bucuresti No.1, Balotesti, Ilfov, 077015, Romania, Tel. number:0040726585870 Fax number: 0040213512080.Correspondence: mihai.gras@ibna.ro, gras_mihai@yahoo.com, Pistol GC, Ph. D| National Research-Development Institute for Biology and Nutrition, Animal Biology Laboratory, Calea Bucuresti No.1, Balotesti, Ilfov, 077015, Romania, Tel. number:0040726585870 Fax number: 0040213512080., Pelmus RS, Ph. D| National Research-Development Institute for Biology and Nutrition, Animal Biology Laboratory, Calea Bucuresti No.1, Balotesti, Ilfov, 077015, Romania, Tel. number:0040726585870 Fax number: 0040213512080., Lazar C, Ph. D| National Research-Development Institute for Biology and Nutrition, Animal Biology Laboratory, Calea Bucuresti No.1, Balotesti, Ilfov, 077015, Romania, Tel. number:0040726585870 Fax number: 0040213512080., Grosu H, Ph. D| National Research-Development Institute for Biology and Nutrition, Animal Biology Laboratory, Calea Bucuresti No.1, Balotesti, Ilfov, 077015, Romania, Tel. number:0040726585870 Fax number: 0040213512080., Ghita E, Ph. D| National Research-Development Institute for Biology and Nutrition, Animal Biology Laboratory, Calea Bucuresti No.1, Balotesti, Ilfov, 077015, Romania, Tel. number:0040726585870 Fax number: 0040213512080.
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