PRACTICAL TESTS IN KARAKUL SHEEP BREEDING

HCC Trace elements A5:13605 Practical sheep breeding

Factors Affecting Neonatal Lamb ~ortality in Pak-karakul Sheep

This study was conducted on 528 neonates of Pak-Karakul sheep born during February to April, 1998 at the Sheep and Goat Development Center, Rakh Khairewala, District Layyah, Overall mortality observed in neonates was 9.28%.The mortality rate in male and female neonatal lambs was 9.72 and 8.90%,respectively. The survived lambs were significantly heavier (3.77 ± 0.63 kg) (P< 0.001) than those die...

Application of myostatin in sheep breeding programs: A review

Myostatin or growth and differentiation factor 8 (GDF8), has been known as the factor causing double muscling phenotypes in which a series of mutations make the myostatin protein inactive, hence disabling it to regulate the deposition of muscle fibre. This phenotype happens with high frequency in a breed of sheep known as the Texel. Quantitative trait loci (QTL) studies show that a portion of t...

Breeding objectives for Targhee sheep.

Breeding objectives were developed for Targhee sheep under rangeland production conditions. Traits considered were those for which EPD were available from the US National Sheep Improvement Program and included direct and maternal effects on 120-d weaning weight (WW and MM, respectively); yearling weight (YW); yearling fleece weight, fiber diameter, and staple length; and percent lamb crop (PLC)...

Breeding sheep for scrapie resistance

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