The effect of the Texel Muscling QTL on live and carcass weight in Texel lambs

JM Macfarlane, NR Lambe, W Haresign, L Bunger

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2 Citations (Scopus)


The Texel Muscling QTL (TM-QTL) is a QTL affecting loin muscling in Texel sheep with a paternal polar overdominant pattern of expression. This study on purebred Texel sheep used the first available data to include homozygote TM-QTL carriers in addition to homozygote non-carriers and both heterozygotes to assess the effect of TM-QTL on live weight throughout growth from birth to slaughter (at around 20 weeks of age) and carcass weight. TM-QTL was found to have an effect on most measures of live and carcass weight. Animals inheriting two copies of TM-QTL showed an increase of 1.5 kg or 9% in carcass weight and an increase in live weight across a range of ages from birth to slaughter of between 7 and 15% compared to animals carrying no copies of TM-QTL. The effect of TM-QTL on the weight traits studied appears to be additive but heterozygote weights did not always support this. If more data on lambs carrying TM-QTL become available in future it would be useful to validate this effect on live and carcass weight and the pattern of the effect. © 2012 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)117 - 121
Number of pages5
JournalSmall Ruminant Research
Volume105 (1-3)
Publication statusFirst published - 2012

Bibliographical note



  • Genetics
  • TM-QTL
  • Texel
  • Weight


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