Analysis of Egg White Lysozyme Polymorphisms among Japanese Quail Populations in Japan and France

The relationship between lysozyme gene polymorphism and quality changes during the storage of eggs derived from 2 commercial strains of Japanese quail

“…The sequence of the second lysozyme form (F-fast), with lysine at position 21 and an additional leucine at position 20, was determined by Thammasirirak et al (2007) . Subsequent analyses conducted on other populations of Japanese quail did not detect the presence of an additional leucine at position 21 in the lysozyme amino acid sequence ( Myint et al, 2012a ; 2012b ). This was also not observed in the present study.…”

“…This may explain the very low frequency of the A allele in this strain. Partial explanation for this genotype frequency in the F33 may be found in the study by Myint et al (2012b) , who showed significantly higher antibacterial activity of the fast lysozyme form (C allele) compared to the slow form (A allele). The slow form was associated also with higher hatching rates.…”

“…In terms of the C allele frequency, the F33 is unique compared to other populations of Japanese quail worldwide. Myint et al (2012b) determined the genotype and allele frequencies of A and C representing the slow and fast lysozyme forms in 22 genetic lines of Japanese quails maintained in Japan and 5 populations maintained in France. In the analyzed populations, the frequency of the A allele (S form) ranged from 0.69 to 1.00, while the frequency of the C allele (F form) ranged from 0.00 to 0.31.…”

“…None of the analyzed populations showed such a high frequency of the C allele as observed in the F33. Perhaps this is due to the small number of individuals representing specific populations ( Myint et al, 2012b ). In the available literature, information can be found about another SNP located at position 144 of the coding sequence, which is a synonymous substitution involving the substitution of the C with T ( Myint et al, 2012a ).…”