have phenotypic trends for carcass traits followed genetic trends
Download
Skip this Video
Download Presentation
Have Phenotypic Trends for Carcass Traits Followed Genetic Trends?

Loading in 2 Seconds...

play fullscreen
1 / 21

Have Phenotypic Trends for Carcass Traits Followed Genetic Trends - PowerPoint PPT Presentation


  • 79 Views
  • Uploaded on

Have Phenotypic Trends for Carcass Traits Followed Genetic Trends?. Dan W. Moser Department of Animal Sciences and Industry Kansas State University, Manhattan http://www.asi.ksu.edu. Market conditions More calf feds Harvesting younger Pounds still drive profit. Implants Drought

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Have Phenotypic Trends for Carcass Traits Followed Genetic Trends' - axl


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
have phenotypic trends for carcass traits followed genetic trends

Have Phenotypic Trends for Carcass Traits Followed Genetic Trends?

Dan W. Moser

Department of Animal Sciences and Industry

Kansas State University, Manhattan

http://www.asi.ksu.edu

reasons why
Market conditions

More calf feds

Harvesting younger

Pounds still drive profit

Implants

Drought

Select grade results in fewer no rolls

Graders

Reasons Why?
why has genetic progress been so slow
Why has genetic progress been so slow?

Response per generation =

Heritability X Selection Differential

slide12

Why has genetic progress been so slow?

  • Generation interval is +/- 5 years
    • Add another generation from seedstock to commercial cattle.
  • Variation within breeds is limited
  • A significant segment of every breed still ignores carcass traits
how can we speed genetic progress
How can we speed genetic progress?
  • Collect more carcass and ultrasound data
  • Use breed differences to increase rate of change in hybrids/composites
  • At some point, DNA technology may increase accuracy of selection for young animals
slide14

How can we speed phenotypic progress?

  • Use appropriate breed combinations in crossbreeding systems
  • 50% British, 50% continental optimizes quality and yield grade
do trends need to change
Do Trends Need to Change?
  • Depends on supply/demand ratios of various product specifications
    • Better yield grades are always desirable
  • Grid factors should better reflect true value differences
    • Next round of the cattle cycle?
ad