Project Overview
Commodities
- Agronomic: grass (misc. annual), medics/alfalfa
- Animals: sheep
Practices
- Animal Production: genetics
- Education and Training: on-farm/ranch research
- Farm Business Management: budgets/cost and returns
Abstract:
The American sheep industry has seen a steady decline in national sheep numbers dropping from a record 56 million sheep in 1942 to 5.23 million in 2017. A dramatic increase in production efficiency is critical to the future success of the sheep industry. Technologies like electronic identification (EID) tags and genomic testing have been profitably adopted by other livestock industries. We worked with a group of 5 California sheep ranchers to demonstrate and evaluate the economics of how information from both EIDs, and a targeted sheep genotyping panel could be incorporated into commercial sheep production systems. These 5 ranchers participated in the project by allowing researchers to place EID's in the ears of their rams and a sub-sample of lambs; tissue samples were taken from the animals that received EID's. Ranchers also provided an overview of their operation, including a discussion of current management practices and past use of EID's in their flock. Working in partnership with the largest sheep processor in California, Superior farms, tissue samples were submitted to their new genetic testing program, Flock54. Flock54 is a targeted genotyping panel for the sheep industry for pedigree assignment and marker-assisted selection. Lambs from three of the ranchers were sold to Superior Farms for finishing and harvest; data on carcass characteristics was collected using a camera grading system for a portion of the lambs sold to Superior. Genomic data was used to determine parentage and for genetic evaluations. Costs and benefits associated with the adoption of both EID and DNA testing was evaluated. The collaborating ranchers, Superior farms, UCCE specialists and county-based advisors worked collaboratively to plan, design, implement and monitor the project. Like many projects, COVID forced us to alter our outreach plans. Thankfully all the tissue samples and EID tags were placed before quarantine measures were in place. We had originally planned to hold field days and meetings to share research findings. As this was not possible, we took advantage of other outreach opportunities including a risk management workshop targeted at sheep producers, the California Wool Grower's Association meeting, and the American Sheep Industry conference.
Project objectives:
The broad goal of this study is to evaluate the benefits and challenges of adopting EID and DNA-based information in the California sheep industry. Adoption of these technologies is one step towards the increased use of information to improve production efficiency, which is currently needed to sustain the sheep industry in California and nationwide.
Specifically, we seek to:
1) Document the current operational costs and records maintained by the five cooperating sheep ranchers at the start of this project (pre-implementation)
2) Work with collaborating producers to place EIDs and collect DNA samples from rams and lambs
3) Collect weaning weight data and other on-ranch phenotypes where feasible, and document the expenses associated with collecting these phenotypes
4) Collect processing, carcass, and camera grading data from Superior Farms on the lambs selected under objective 2
5) Genotype the DNA samples from the rams and 2,500 lambs with the Flock54 genetic test, determine relationships among individuals, and between phenotypes and genotypes
6) Utilize the information collected in this project to quantify the economics of using EID technology in sheep management
7) Assess the value of genetic testing in commercial sheep flocks based on economic analysis of projected positive change scenarios from selecting genetically superior rams based on the genotyping and phenotyping results obtained in this study
8) Share outcomes and findings with California sheep producers through three on-ranch workshops and publications that demonstrate the project’s findings, namely the utility and potential value of EID technology and genetic selection as a flock improvement tool.