a comparison of fatty acids composition of sperm lipid in some iranian ruminants

نویسندگان

آرمین توحیدی

دانشیار، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج فرهاد صمدیان

دانشجوی دکتری پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج حمید کهرام

استادیار پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج مهدی انصاری

دانشجوی کارشناسی ارشد پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج

چکیده

the aim followed in this study was to make a comparison of the composition of fatty acids available in the sperm lipids of cattle, sheep and goat. semen samples were collected from 28 holestein cows, 12 chal rams and 7 mahabadi goats. after washing out and removal of the seminal plasma, total lipids of the sperm were extracted and fatty acids trans-methylated. the fatty acid methyl esters were injected into gc apparatus and the percentages of fatty acids calculated. the results indicated that the percentages of c16:1 and c18:0 were significantly higher in bull sperm than those in goat and ram sperm. c20:4(n-6), c20:2(n-6) and c20:5(n-6) were detected in small percentages only in bull sperm samples. the proportion of c22:6(n-6) was significantly higher in bull sperm (19.3%) as compared with goat and ram's (3.85% and 3.14% respectively). the proportion of long chain fatty acid c24:0 was significantly higher in bovine sperm lipids as compared with that in ovine sperm. this fatty acid was not detected in goat sperm. the ratio of n-3/n-6 fatty acids in bull sperm (2.56) was significantly higher than this ratio in goat (0.53) and ram (0.21) sperm.

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علوم دامی ایران

جلد ۴۲، شماره ۴، صفحات ۳۶۱-۳۶۷

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