Study on developmental changes of amino acid spectrum in Muscovy duck muscle
Samples of breast and leg muscles from the same batch of female Muscovy ducks at 14,28,42,70,and 660 days of age were collected post-slaughter,and the changes in moisture,protein,and amino acid content were de-termined,to clarify the developmental changes in amino acid profiles of Muscovy duck breast and leg muscles.Re-sults indicated that both breast and leg muscle weights increased significantly(P＜0.05)with age,while the protein content increased overall yet the moisture content gradually decreased during the entire developmental process.The total amount of amino acids and essential amino acids in breast muscles increased with age,showing no significant difference between 70 and 660 days but significantly higher levels compared to 14,28,and 42 days.Lysine and cys-teine levels were significantly higher at 70 days,while arginine,tyrosine,valine,phenylalanine,isoleucine,and proline levels were significantly higher at 660 days.In leg muscles,total amino acid content,essential amino acids,and umami amino acids peaked at 70 days,with significantly higher levels of alanine,leucine,and lysine compared to other ages.Cysteine,threonine,and tyrosine levels were significantly higher at 660 days.Orthogonal partial least squares discriminant analysis revealed differences in amino acid profiles between breast and leg muscles of Muscovy ducks at different ages,with lysine and cysteine identified as the most important amino acids contributing to metabol-ic profile differences from 14 to 660 days.In conclusion,amino acid content in Muscovy duck muscles undergoes significant changes with age,with notable peaks in total amino acids,essential amino acids,and umami amino acids in leg muscles at 70 days,and in total amino acids and essential amino acids in breast muscles at 660 days.
Muscovy duckdays of agemuscleamino acidprincipal component analysis
万方数据
维普
