Malau-Aduli_1998WCGALPArmidaleSexBreedPL.pdf (194.9 kB)
Sex and breed differences in the fatty acid composition of muscle phospholipids in crossbred cattle
conference contribution
posted on 2023-05-26, 07:54 authored by Deland, MPB, Malau-Aduli, AEO, Siebert, BD, Bottema, CDK, Pitchford, WSPhospholipid data from the Longissimus dorsi (eye muscle) of 117 weaners across 7 cattle genotypes were analysed. The aim was to investigate sex and breed differences in fatty acid composition of muscle phospholipids in an entirely grass-fed management situation. Results showed that sex was a significant source of variation in the levels of 18: ln-9, total monounsaturated fatty acids (MUFA) and calculated ˜ívÆ9-desaturase enzyme activity index. Heifers had higher percentages in all cases than steers. All the other individual fatty acids and the summations of their proportions did not differ between the sexes. Significant breed differences were apparent in 18: ln-9, 18:3n-3, MUFA and ˜ívÆ9-desaturase enzyme index. Wagyu and Belgian Blue crosses had the highest proportion of 18: ln-9 and Hereford the lowest. Jersey crosses and Hereford breeds had the highest 18:3n-3 levels and Belgian Blue the lowest. ˜ívÆ9-desaturase enzyme index was highest in the Wagyu crosses. There were no other breed differences detected in all the other individual fatty acids and their summations. This study suggests that in weaners, the fatty acid composition of muscle lipids differs between breeds and sexes. The magnitude of the differences is, nevertheless, more reflected in the adipose tissue than in the muscle phospholipids. Also, Wagyu and Belgian Blue genotypes produced muscles with the most monounsaturated fatty acids.
History
Publication title
Proceedings 6th World Congress on Genetics Applied to Livestock Production, The University of New England, Armidale, Australia.Volume
25Pagination
185-188ISSN
186389 4543Publication status
- Published
Event title
6th World Congress on Genetics Applied to Livestock ProductionEvent Venue
ArmidaleDate of Event (Start Date)
1998-01-11Date of Event (End Date)
1998-01-11Rights statement
In Proceedings 6th World Congress on Genetics Applied to Livestock Production, The University of New England, Armidale, Australia, vol. 25, 185-188.Repository Status
- Open
Usage metrics
Categories
No categories selectedLicence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC