Reproductive characteristics of Chinese Hu sheep |
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| Institution: | 1. Division of Veterinary Clinical Complex, FVSc & AH, SKUAST, Kashmir, J&K 190006, India;2. Division of Surgery, Indian Veterinary Research Institute, Izatnagar 243122, India;1. Department of Animal Science, Faculty of Agricultural Sciences, University of Guilan, Rasht, 41996-13776, Iran;2. Department of Animal Science, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, 65178-33131, Iran;3. Department of Animal Science, Faculty of Agriculture and Natural Resources, Arak University, Arāk, 38156-8-8349, Iran;4. Animal Genetics and Breeding Unit (AGBU), University of New England, Armidale, NSW, 2351, Australia;5. Department of Animal Science, College of Agriculture and Natural Resources, Michigan State University, East Lansing, MI, 48824, USA;1. Unidad de Producción y Sanidad Animal, Centro de Investigación y Tecnología Agroalimentaria de Aragón (CITA)- Instituto Agroalimentario de Aragón (IA2) (CITA-Universidad de Zaragoza), Zaragoza, Spain;2. ARAID, Zaragoza, Spain;3. Université de Toulouse, INRA, ENVT, GenPhySE, Castanet-Tolosan, France;4. Departamento de Mejora Genética Animal, INIA, Madrid, Spain;1. Transgenesis Center of Excellence, Isfahan (Khorasgan) Branch, Islamic Azad University, Iran;2. Department of Animal Science, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran |
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| Abstract: | The reproductive characteristics of Chinese Hu sheep are reviewed. Male and female lambs reached puberty at a mean age of 120 days and 180 days, respectively, with an average body weight of 18.54 ± 1.48 kg (n = 31) and 22.75 ± 1.98 kg (n = 24). Adult male and female sheep reproduced throughout the year. On average, ewes lambed 1.65 times per year (n = 1482). The mean ovulation rate of adult ewes was over 2.2 (n = 46). The average litter size of 150863 ewes raised under extensive conditions was 2.06. The early sexual maturity of male and female lambs was respectively related to high concentrations of testosterone and 17β-E2 in blood plasma in the earlier postnatal period. The mechanism of high fecundity is not known. |
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