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Milk yield of Chios-Ossimi crossbred ewes in relation to the yield of the parental breeds

Rendement Laitier De Brebis Croisees Chios X Ossimi Par Rapport A Celui Des Races Parentales

Produccion De Leche De Cruces Ovinos Chios-Ossimi En Relacion Con La Produccion De Las Razas Progenitoras

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A study was carried out at Mallawi Research Station, 300 km south of Cairo, in which 16 Chios (CC), 31 Ossimi (OO) and 21 of their F1 crossbred ewes (50% Chios- 50% Ossimi (CO)). The CO crossbred ewes were mated to CC rams, whereas OO and CC ewes were mated to rams of the same breeds. The study included only ewes having single lambs in 2 lambing seasons; summer and winter. In the summer, total 8-week milk yield (suckling period) averaged 128·9, 53·4 and 77·1 kg in CC, OO and the crossbred ewes, respectively (P<0·01). Total milk yield averaged 201·6, 65·0 and 110·2 and days of lactation were 151·1, 79·6 and 106·7, respectively (P<0·01). In the winter, total 8-week milk yield averaged 138·6 (P<0·01), 55·0 and 59·5 kg for CC, OO and the crossbred ewes, respectively. Total yield averaged 209·1 (P<0·01), 65·9 and 76·5 kg and days of lactation were 153·3, 79·8 and 93·4, respectively (P<0·01).


Une étude a été réalisée à la station expérimentale de Mallawi, à 300 km au sud du Caire, sur 16 brebis Chios (CC), 31 Ossimi (OO) et 21 croisées de première génération (50% Chios-50% Ossimi (Co). Les brebis croisées (Co) ont été saillies par des béliers CC tandis que les brebis OO et CC étaient saillies par des béliers de mêmes races. L'étude ne concerne que des brebis n'ayant qu'un seul agneau en 2 saisons d'agnelage: été et hiver. Pour la période d'été, le rendement laitier total de 8 semaines (période d'allaitement) était en moyenne de 128,9–53,4 et 77,1 kg chez les brebis CC, OO et croisés, respectivement (P<0,01). Le rendement laitier total atteignait des moyennes de 201,6, 65 et 110,2. Les jours de lactation étaient de 151,1, 79,6 et 106,7 respectivement (P<0,01). En hiver, le rendement laitier total sur huit semaines était en moyenne de 138,6 (P<0,01), 55 et 55,5 kg pour CC, CO et les brebis croisées, respectivement. Le rendement total moyen était de 209,1 (P<0,01), 65,9 et 76,5 kg et les jours de lactation étaient de 153,3, 79,8 et 93,4 (P<0,01) respectivement.


Se llevó a cabo un estudio en la Estación Experimental Mallawi, localizada 300 km al sudoeste del Cairo, con 16 Chios (CC), 31 Ossimi (OO) y 21 de sus cruzas F1 (50% Chios-50% Ossini (CO)). Las ovejas cruzadas CO fueron cruzadas con machos CC, mientras que las ovejas OO y CC fueron cruzadas con machos de la misma raza. El estudio incluyó solamente ovejas que tuvieron partos sencillos en 2 períodos de pariciones; verano e invierno. En el verano, el total de 8 producciones semanales durante el período de amamantamiento promediaron 128·9, 53·4 y 77·1 kg en CC, OO, y en las ovejas cruzadas, respectivamente (P<0·01). El total de la producción de leche promedió 201·6, 65·0 y 110·2, siendo los días de lactación de 151·1, 79·6 y 106·7, respectivamente (P<0·01). En el invierno, el total de 8 producciones semanales promediaron 138·6 (P<0·01), 55·0 y 59·5 kg para CC, OO y los cruces, respectivamente. El promedio del total producido fue de 209·1 (P<0·01), 65·9 y 76·5 kg, siendo los días de lactación de 153·3, 79·8 y 93·4, respectivamente (P<0·01).

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Mousa, M.T., Shetaewi, M.M. Milk yield of Chios-Ossimi crossbred ewes in relation to the yield of the parental breeds. Trop Anim Health Prod 27, 50–54 (1995).

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