CBGW Diane Panrucker Panel
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Marker assisted selection can be used to accelerate genetic change for economic and production traits in cattle. It allows for more direct selection compared to phenotype-based selection alone. This can increase profitability through improved feed efficiency, carcass value, and other traits. While marker assisted selection may increase uniformity across breeds, variation is still important for adaptation to different environments. Breeders need to consider how to balance selection for market traits while maintaining breed distinctions and ability to adapt. Genomic technology can help improve the accuracy of estimated breeding values by linking DNA information to performance data.
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CBGW Diane Panrucker Panel
- 1. ALMA Alberta Livestock & Meat Agency Ltd. Canadian Bovine Genomics Workshop September 14, 2009 Calgary, Alberta
- 2. Questions to Panel 1 Participants Diane Panrucker
Editor's Notes
- Seedstock Perspective Excellent Questions Small Bites
- Perfect Cow Feet,legs udder calve every year for 15-20 years docile right color polled calf grows like stink Cow does her thing in near desert, mountain slopes, near north Not perfect – then maternal breed complements a terminal sire Bonus hybrid vigor
- Selection based on these characteristic have allowed for the fine tuning that individual producers need in order to respond to the market drivers within their particular environment. Eg. Central ab tan continental vs south British The major downside of traditional selection is the length of generation time required to establish proofs of genetic change in an animal produces one calf per year and at least 3 years for this calf to reach production age.
- Cattle Selection using genomics will potentially allow marker assisted selection for economic, production and convenience traits more directly resulting in an accelerated rate of genetic change. Increase uniformity, predictability and accuracy of carcass value in live seedstock Increase profitability through feed efficiency Identification of convenience traits such as polled, colour and docility etc. Improved predictability with regard to animal health, (For example, innate resistance to BVD, Johne’s disease, genetic defects. Etc.) Traceability Internationally recognized parentage identification/verification including multi-sire groups
- If all breeders select for the same markers will breed distinctions disappear into a homogenous beef breed? Can we get everything we need in one breed? Can marker assisted selection be used to reinforce breed distinctions or will there be a tendency to homogenize all breeds based on current market drivers? How important is variation to the overall survival and productivity of the cattle industry? Clearly, different production environments will require the ability to quickly adapt to change in market or ecological constraints. We need to reaffirm the necessity for the propagation of specific breeds.
- One of the major challenges many purebred breeders face is having the lack of access to carcass data. It remains difficult to get carcass information back to the breeders before the animal progeny is slaughtered The Canadian Gelbvieh Association (CGA), like most breeds was fortunate to receive the Gov of Canada “Sustaining the Genetic Quality of Ruminants” (SGQR) grant in 2005. The CGA took a portion of this grant and applied it to run Genestar DNA profiles on all active sires (AI and pasture) using the marker panel offered at that time by Bovigen. These markers included 3 marbling and 3 tenderness SNPs. In addition the CGA offered to subsidized ultrasound on these and all calendar year bull prospects. Correlation between ultrasound and snp’s were not always perfect but results were nonetheless very interesting. The American Gelbvieh Association (AGA) also invested in testing a significant number of sires. As both Canada and US have international EPD’s the ultimate goal is the addition of all DnA data to improve the accuracy of Carcass EPD’s by incorporating SNP results. To continue this research into genomic technology, we have entered into an agreement with the University of Alberta AB GP to collect samples from all active Gelbvieh sires and cows. To date, we have an estimated 68% of registered Gelbvieh cattle collected. This number includes sires, dams and their progeny including deads. In addition, The U of A is providing parentage testing on all active sires, embryo calves and donors.