The effects of exogen hormone treatment during the anoestrus period on fertiliy in crossbred ewes carrying Booroola genes (F and f)

Ozturk B., Elicin A.

TURKISH JOURNAL OF VETERINARY & ANIMAL SCIENCES, vol.23, no.6, pp.615-620, 1999 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 23 Issue: 6
  • Publication Date: 1999
  • Journal Name: TURKISH JOURNAL OF VETERINARY & ANIMAL SCIENCES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.615-620
  • Keywords: Booroola Merino, PMSG, reproductive traits, SHEEP
  • Ankara University Affiliated: No

Abstract

In this study, the effects of progestagen and different doses of PMSG (250 I.U and 400 I.U) treatment on pregnancy, lambing and multiple birth rates in Border Leicester x Boorooia (Ff) x Merinos and Border Lecister x Boorooia (ff) x Merinos ewes in the anoestrus cycle were examined. It was found that in ewes with Ff genotype, 250 I.U PMSG dose had a positive but nonsignificant effect on the pregnancy rate and it was significant (p<0.01) on lambing and twinning rate. On the other hand, in ewes with ff genotype, it was found that the effect of progestagen + 400 I.U PMSG treatment on the same traits was significant (p<0.01). it was determined that the pregnancy, lambing and multiple birth rates in ewes with Ff and ff genotypes which were treated with exogen hormone were higher (p<0.01) than ewes with ff genotype which wereot treated with exogen hormone.