期刊
MEAT SCIENCE
卷 85, 期 4, 页码 684-690出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.meatsci.2010.03.025
关键词
Meat eating quality; Meat quality; Muscularity; Texel; Lambs; QTL
资金
- BBSRC
- Defra
- EBLEX
- HCC
- QMS
- LMCNI
- Catapult Genetics
- Innovis Genetic Ltd
- Welsh Country Foods
- EplusV/Germany
- ASDA stores
- SAMW
- Suffolk Sire Referencing Scheme Ltd.
- British Texel Sheep Society Ltd.
- Charollais Sire Reference Scheme
- Biotechnology and Biological Sciences Research Council [BB/E01903X/2, BB/E018963/1] Funding Source: researchfish
- BBSRC [BB/E01903X/2, BB/E018963/1] Funding Source: UKRI
A quantitative trait locus (QTL) has been identified on chromosome 18 in Texel sheep (TM-QTL) that increases depth and area of the longissimus dorsi muscle. The study aimed to assess the pleiotropic QTL effects on key meat quality traits (toughness and intramuscular fat content after >= 7 days aging) of crossbred lambs carrying one copy of the TM-QTL. The results showed that male Texel x Mule lambs carrying the TM-QTL had significantly less intramuscular fat (1.86% versus 2.25%) and higher toughness, with increased variation, in the loin muscle, compared to non-carrier males. Similar conclusions were obtained using two different types of tenderometer equipment: one using the Volodkevitch test (average shear force of 4.17 kgF or 40.9 N for carrier males, 2.61 kgF or 25.6 N for non-carrier males) and one using the MIRINZ test (average shear force of 6.18 kgF or 60.6 N for carrier males, 5.22 kgF or 51.2 N for non-carrier males). Although most toughness measurements were within published consumer acceptability limits, a few individual TM-QTL carrier lambs had unacceptably tough meat, despite enhanced post-slaughter processing. The TM-QTL did not significantly affect loin toughness in female lambs, leg toughness in either sex, or intramuscular fat content. These results should be considered, alongside direct effects of the TM-QTL on muscling and carcass composition, in recommendations for the use of this QTL by sheep breeders. (C) 2010 Elsevier Ltd. All rights reserved.
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