Genetic and nongenetic effects on the number of ovarian follicles and oocyte yield and quality in the bovine local (Oulmes Zaer), exotic breeds and their crosses in Morocco

  • A Fassi Fihri Laboratory of Zoology and General Biology, Department of Biology, College of Science, University Mohamed V. Rabat, Morocco.
  • H Lakhdissi Department of animal reproduction, Obstetrics and artificial insemination. Hassan II Agronomy and Veterinary Medicine Institute, Rabat, Morocco
  • L Derqaoui Department of animal reproduction, Obstetrics and artificial insemination. Hassan II Agronomy and Veterinary Medicine Institute, Rabat, Morocco
  • Kh Hajji Laboratory of Zoology and General Biology, Department of Biology, College of Science, University Mohamed V. Rabat, Morocco.
  • M Naciri Laboratory of Zoology and General Biology, Department of Biology, College of Science, University Mohamed V. Rabat, Morocco.
  • A Goumari Department of Statistics, Hassan II Agronomy and Veterinary Medicine Institute, Rabat, Morocco.
Keywords: Cows, follicular population, oocyte yield and quality

Abstract

The effects of genetic and non genetic factors on the number of ovarian follicles and oocyte yield and quality in the bovine local breed (Oulmes Zaer), exotic breeds and their crosses in Morocco was investigated. In this study, females in very bad body conditions (BCS < 2) were not slaughtered and the average. The body condition scores (BCS) was 2.94 ± 0.89. Although some individual values were out of the normal ranges, mean values of total proteins, albumin, urea, β-OH and GOT remain normal and were 77.83 ± 8.74 g/l, 32.4 ± 4.41g/l, 4.43 ± 2.13 mmol/l , 0.83± 0.48 mmol/l et 45.55 ± 11.95 UI/l, respectively. The mean number of ovarian follicles per cow (2-8 mm) was high (22.98 ± 8.41) whereas the oocyte yield (and 2.60 ± 1.53) was very low. The effects of genetic group, age and BCS on the number of follicles, oocyte yield and the quality were significant.
Key Words: Cows, follicular population, oocyte yield and quality.
African Journal of Biotechnology Vol.4(1) 2005: 9-13
Published
2005-03-24
Section
Articles

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eISSN: 1684-5315