publication . Doctoral thesis . 1995

Selection to improve spring fertility in a crossbred sheep population

Al-Shorepy, Salih Abdu;
Open Access
  • Published: 13 Mar 1995
  • Publisher: Virginia Tech
  • Country: United States
Abstract
Reproductive and productive performance of a composite sheep population, containing 50% Dorset, 25% Rambouillet and 25% Finn sheep breeding and under selection for ability to lamb in the fall, was evaluated. Traits considered were spring fertility, faIl litter size, live weights at birth, weaning, and at about 90 and 120 d of age, and scrotal circumference at weaning and at about 90 and 120 d of age. Fertility was defined as 1 or 0 depending upon whether a ewe lambed or failed to lamb, respectively, in fall. Litter size was defined as the number of lambs born per ewe lambing. A total of 1,102 exposures were used. Fertility averaged .59 for adult ewes (3 years an...
Subjects
free text keywords: sheep, reproduction, LD5655.V856 1995.A474
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Doctoral thesis . 1995
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