A case study on cryopreservation of African sheep semen for the Red Maasai, Dorper breeds and their crosses
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Yamashiro H., Wando J. R., Okoth E., Sugimura S., Moisyadi S., Sato E., Rege E.O., and Okeyo, A.M. 2011. A case study on cryo-preservation of African sheep semen for the Red Maasai, Dorper breeds and their crosses. African Journal of Agricultural Research 6(4): 844-848
Permanent link to this item: http://hdl.handle.net/10568/4774
The objective of this study was to examine the effect of different concentrations of trehalose and raffinose in Tris-citric acid-glucose (TCG) egg yolk extender for the sperm freezability of Red Maasai sheep, another African breed- the Dorper and their crosses. The results showed that Red Maasai, Dorper and their crosses sperm could be cryopreserved by extending with 0.075 to 0.01 M trehalose or raffinose-TCG egg yolk extender. We conclude that the cryopreservation of currently under threat Red Maasai sheep due to uncontrolled exotic breeds sperm makes it possible to establish a gene bank for the storage of animal genetic resources for endangered species, under the management of the International Livestock Research Institute for future genetic options in an uncertain world.