Evaluating the effects of a single copy of a mutation in the myostatin gene (c.*1232 G>A) on carcass traits in crossbred lambs

AY Masri, NR Lambe, JM Macfarlane, S Brotherstone, W Haresign, L Bunger

    Research output: Contribution to journalArticlepeer-review

    Abstract

    This study evaluated the effects of the ovine c.*1232 G > A myostatin mutation (MM) on carcass traits in heterozygous crossbred lambs sired by Texel and Poll Dorset rams using ultrasound, CT scanning, carcass classification and VIA. In experiment 1, MM was associated with increased loin depth (+ 2.8%) and area (+ 3.2%). MM-carriers had significantly higher CT-estimated lean weight and proportion (2 to 4%) and muscle to bone ratio (by ~ 3%), in both experiments, and muscle to fat ratio (28%) in experiment 2. Muscle areas in three cross-sectional CT scans, were higher (2 to 5%) in MM-carriers. In experiment 2, fat-related measurements were significantly lower in MM-carrier lambs but this was not seen in experiment 1. A significant increase in muscle density, indicative of lower intramuscular fat, in MM-carriers shows that meat quality characteristics need attention. Carrying MM significantly decreased carcass fat scores. VIA did not detect any significant MM effects.
    Original languageEnglish
    Pages (from-to)412 - 418
    Number of pages7
    JournalMeat Science
    Volume87
    Publication statusFirst published - 2011

    Bibliographical note

    52110086

    Keywords

    • Carcass traits
    • Computer tomography
    • Crossbred lambs
    • Myostatin
    • Video image analysis
    • c.*1232 G > A

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