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A Study on Effect of Carrying FecB Gene on Body Weight in Garole and Garole×Malpura Sheep

  • Kolte, A.P. (Animal Biotechnology Section and Division of Animal Genetics and Breeding Central Sheep and Wool Research Institute) ;
  • Mishra, A.K. (Animal Biotechnology Section and Division of Animal Genetics and Breeding Central Sheep and Wool Research Institute) ;
  • Kumar, S. (Animal Biotechnology Section and Division of Animal Genetics and Breeding Central Sheep and Wool Research Institute) ;
  • Arora, A.L. (Animal Biotechnology Section and Division of Animal Genetics and Breeding Central Sheep and Wool Research Institute) ;
  • Singh, V.K. (Animal Biotechnology Section and Division of Animal Genetics and Breeding Central Sheep and Wool Research Institute)
  • Received : 2004.12.21
  • Accepted : 2005.05.04
  • Published : 2005.10.01

Abstract

High prolificacy in Garole sheep is due to existence of FecB mutation in an autosomal gene, bone morphogenetic protein receptor. The mutation enhances ovulation rate and in turn litter size in Garole sheep. Garole sires were crossed with non-prolific Malpura ewes with the aim to introduce prolificacy into Garole${\times}$Malpura (G${\times}$M) crosses through FecB introgression programme. In the present study, the effect of carrying booroola allele on litter size and live body weight was analyzed. The average litter size at birth was found to be 1.87 and 1.48 in the Garole and the G${\times}$M crosses, respectively. At weaning, 6-month, 9-month and 12-month of age, body weights were not affected by the presence of booroola allele (p>0.05); however, a significant effect (p<0.05) was found on body weight at birth in G${\times}$M crosses. In Garole sheep, no significant effect of FecB was observed on live weights in any age group. The interaction between the genetic group and the FecB genotype was also found to be non-significant.

Keywords

Garole;Garole${\times}$Malpura;Litter Size;Body Weight;FecB Gene

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Cited by

  1. (Booroola) mutation is associated with lower birth weight and slower post-weaning growth rate for lambs, as well as a lighter mature bodyweight for ewes vol.18, pp.4, 2006, https://doi.org/10.1071/RD05134
  2. Genetic analysis for growth traits of prolific Garole × Malpura (GM) sheep vol.43, pp.2, 2011, https://doi.org/10.1007/s11250-010-9718-8