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A higher proportion of female lambs in Kurdish × Romanov ewes fed a diet rich in n-3 fatty acids and rumen undegradable protein around mating | ||
| Iran Agricultural Research | ||
| مقاله 12، دوره 42، شماره 2، 2023، صفحه 100-109 اصل مقاله (530.92 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22099/iar.2024.50864.1621 | ||
| نویسندگان | ||
| Marzieh Fatahi1؛ Farshid Fatahnia* 1؛ Hoshang Jafari2؛ Golnaz Taasoli3؛ Aminollah Pormalekshahi2؛ Shahryar Kargar4؛ Edward.H Clayton5 | ||
| 1Department of Animal Science, Ilam University, Ilam, I. R. Iran. | ||
| 2Animal Science Research Department, Ilam Agricultural and Natural Resources Research and Education Centre, AREEO, Ilam, I. R. Iran | ||
| 3Department of Animal Science, Chaharmahal and Bakhtiari Agricultural and Natural Resources Research and Education Centre, AREEO, Shahrekord 88156–89554, I. R. Iran | ||
| 4Department of Animal Science, School of Agriculture, Shiraz University, Shiraz 71441–65186, I. R. Iran | ||
| 5NSW Department of Primary Industries, Wagga Agricultural Institute, | ||
| چکیده | ||
| An increased intake of rumen undegradable protein (RUP) or n-3 fatty acids (FA) around mating is connected with improved reproductive efficiency in ewes. This experiment was aimed to study whether the ratio of female lambs was greater when Kurdish × Romanov ewes were received a diet rich in n-3 FA and RUP together around mating. Experimental diets were supplemented with 5% (DM basis) Ca salts of saturated FA (SFA), 5% Ca salts of fish oil (as n-3 FA source; n-3FO), or a combination of 5% Ca salts of fish oil and 5% fish meal (as a RUP source; n-3FO+RUP). The results showed that the proportion of total n-3 polyunsaturated FA (PUFA) in plasma increased and the n-6:n-3 decreased at CIDR removal day in animals received the n-3FO+RUP diet (P < 0.05) compared with the other diets. Plasma concentrations of oestradiol, glucose, and urea nitrogen (UN) at the day of oestrus (P < 0.05) was also lower when ewes received the n-3FO+RUP diet compared with the other diets. The ratio of female lambs was greater when ewes were fed the n-3FO+RUP diet around mating (P < 0.05) and was greater than an expected 50:50 ratio (72% females, P = 0.028). It was concluded that feeding ewes a diet rich in n-3 FA and RUP content around mating, rather than n-3 FA alone, could skew the sex ratio of lambs toward females. | ||
| کلیدواژهها | ||
| Fetal programming؛ Lamb sex ratio؛ Omega fatty acid؛ Rumen undegradable protein | ||
| مراجع | ||
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