Genotypic effects of the Texel Muscling QTL (TM-QTL) on meat quality in purebred Texel lambs

NR Lambe, RI Richardson, JM MacFarlane, I Nevison, W Haresign, O Matika, L Bunger

    Research output: Contribution to journalArticle (Academic Journal)peer-review

    12 Citations (Scopus)

    Abstract

    Texel muscling QTL (TM-QTL) increases loin muscling in lambs inheriting it from their sire only. This study investigated TM-QTL effects on meat quality in 209 Texel lambs that were CT-scanned then slaughtered at 20 weeks (carcasses aged for ~1 week). Loin meat quality traits included: CT measured muscle density (predicting intramuscular fat); mechanical tenderness using Volodkevichtype jaws or MIRINZ tenderometer; intramuscular fat; sensory eating quality (sub-sample of 40 lambs). Volodkevich tenderness was also measured in the leg (Vastis lateralis). TM-QTL genotypes were determined, giving 40 non-carriers (+/+), 70 heterozygotes - 53 inheriting TM-QTL from the sire (TM/+) and 17 from the dam (+/TM), 34 homozygote TM-QTL lambs (TM/TM) and 65 uncertain. Multiple regression identified no genotype effects on meat quality. For MIRINZ-measured loin tenderness only, contrasts revealed a significant additive effect of TM-QTL (1.27 kgF difference between homozygotes). However, the taste panel identified no significant differences between +/+ and TM/TM lambs. Results show little evidence of TM-QTL affecting meat quality.
    Translated title of the contributionGenotypic effects of the Texel Muscling QTL (TM-QTL) on meat quality in purebred Texel lambs
    Original languageEnglish
    Pages (from-to)125 - 132
    JournalMeat Science
    Volume89
    Issue number2
    DOIs
    Publication statusPublished - 2011

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