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 Environmental Stess

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df



Posts : 613
Join date : 2010-09-28

PostSubject: Environmental Stess   Tue Mar 22, 2011 6:17 pm

Is it possible that EPDs are not as predictive as they could be due to lack of variation? For example, if all females get bred, there is no variation and heritability would be low.

In plant breeding, plant are exposed to suboptimal and superoptimal stress levels help identify genetic efficiencies and tolerances, respectively.
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EddieM



Posts : 895
Join date : 2010-09-24
Location : South Carolina

PostSubject: Re: Environmental Stess   Wed Mar 23, 2011 8:21 am

Quote :
For example, if all females get bred, there is no variation and heritability would be low.

Which EPD?

How do you factor in the IBC effects with an EPD, such as WW or YW?

Which is more important, correct feet and legs, fertility or YW EPD?
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RobertMac



Posts : 377
Join date : 2010-09-28
Location : Mississippi, USA

PostSubject: Re: Environmental Stess   Wed Mar 23, 2011 8:51 am

Environment is why epds aren't predictable. How do you develop a bull in Montana, AI him to cows in Mississippi and expect predictable results?
EPDs would be more predictable with simple ++,+,0, -, or - -.
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df



Posts : 613
Join date : 2010-09-28

PostSubject: Re: Environmental Stess   Wed Mar 23, 2011 10:20 am

EddieM wrote:
Quote :
For example, if all females get bred, there is no variation and heritability would be low.

Which EPD?

How do you factor in the IBC effects with an EPD, such as WW or YW?

Which is more important, correct feet and legs, fertility or YW EPD?

stayability and heifer pregnancy
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