Identification of the frequency of CSN1S2 gene alleles and the effects of these alleles and parity on milk yield and composition in Saanen goats

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Dinçel D. , Ardıçlı S. , Şamlı H.

Large Animal Review, vol.27, pp.1-6, 2021 (Journal Indexed in SCI Expanded)

  • Publication Type: Article / Article
  • Volume: 27
  • Publication Date: 2021
  • Title of Journal : Large Animal Review
  • Page Numbers: pp.1-6


The expression of CSN1S2 gene is known to regulate the α-S2 casein levels in milk composition, moreover is estimated to affect

the milk yield and composition in goat. However, the knowledge about the CSN1S2 gene on milk yield and composition is

restricted in Saanen goats. Therefore, this study aimed to specify the effect of CSN1S2 polymorphisms on milk yield/composition

parameters. The genotyping of Saanen goats (n=120) was performed by PCR-RFLP methods. The GLM procedure was prefered

as statistical analysis to defined the effect of those variations on investigated traits. The result showed that the AA (26.67%),

BB (33.33%) and AB (40.00%) for A-B variant; N* (94.17%), N*0 (5.83%) for D-0 variant; FF (7.50%), NF/NF (65.83%) and

F/NF (26.67%) for F variant in Saanen goats. The effect of A-B allele of CSN1S2 gene (P<0.05) and parity (P<0.001) on milk

composition yields were found significant in the current study. However, the effect of A-B allele on lactation milk yield was determined

tended to be significant (P=0.090). Moreover, significant correlations between the milk composition parameters such

as fat, protein, TS (total solid), SNF(solid not fat), casein, or lactose were observed (P<0.001). The novel outputs might be useful

for developing goat breeding strategies or improving the dairy industry, especially for milk products.