ISSN 2756-3650
International Journal of Animal Breeding and Genetics Vol. 8 (5), pp. 001-005, May, 2019. © International Scholars Journals
Full Length Research Paper
Developmental competence, birth and survival of lambs following transfer of twin or triple embryos of dwarf size prolific donor into large size non-prolific recipient sheep
S. M. K. Naqvi1, A. Joshi1, D. Kumar1, R. Gulyani1, V. P Maurya1, S. Saha1, J. P. Mittal1and V. K. Singh2
1Embryo Transfer Technology Laboratory, Division of Animal Physiology and Biochemistry, Central Sheep and Wool Research Institute, Avikanagar, (Via –Jaipur), Rajasthan-304501, India.
2Division of Animal Genetics and Breeding, Central Sheep and Wool Research Institute, Avikanagar (Via-Jaipur) Rajasthan 304501, India.
Accepted 08 January, 2019
Abstract
The objective of the present study was to assess the embryo survival and development of progeny following transfer of either 2 or 3 embryos derived from dwarf size prolific Garole sheep into non-prolific large size Awassi x Malpura crossbred recipient ewes. Embryos were collected from donor ewes following induction of superovulation using FSH (5.4 mg Ovagen) and PMSG (200 IU) regimen. Estrus was synchronized in donor and recipient ewes by administering two injections of prostaglandin F2 a. The recipient ewes were divided into two groups and each recipient ewe received either 2 (Group 1) or 3 embryos (Group 2) of transferable quality in the uterine horn ipsilateral to corpus luteum. The recipient ewes of both the groups were examined for the presence of fetuses at 40 days of gestation by ultrasonography. The pregnancy and lambing percentages of ewes belonging to Group 2 were 57%, which was comparatively higher than Group 1 ewes where it was 42.9%. The survival of embryos was 38.1% in Group 2 and was higher compared to Group 1 (28.6%). The survival of lambs at weaning was higher in Group 1, compared to Group 2. The results indicate that survival of embryos and pregnancy rate was better following transfer of 3 than 2 embryos of prolific sheep to non-prolific sheep.
Key words: Microsheep, garole, embryo transfer, embryo survival, multiple births.