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== Guideline for Recording Feed Intake for Genetic Evaluation ==
== Introduction Feed and Gas ==
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== Introduction ==
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The widespread use of genomic information in dairy cattle breeding programs has presented the opportunity to select for scares phenotypes of feed intake and feed efficiency. That means animals from research and commercial herds can serve as reference population to calibrate a genomic prediction equation. Genomic breeding values of selection candidates are then used to enhance genetic progress of feed intake and/or feed efficiency. Phenotypes for feed intake, however, are still an important limiting factor for obtaining high accurate breeding values and performing genetic analysis for feed intake and feed efficiency. Based on the experiences gained through several initiatives, we provide guidelines on the recording and quality control of feed intake records for genomic and genetic evaluations.


== Disclaimer ==
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The fact that specific device manufacturers are mentioned in these guidelines is in no way an endorsement of the devices or their accuracy by ICAR.


== Definitions and Terminology ==
== Objectives of the Feed and Gas WG ==
Table 1. Definitions of Terms used in the guideline of recording feed intake for genetic evaluation
The objectives of the Feed and Gas WG are to:
{| class="wikitable"
|+
!Term
!Definition
|-
|DM
|Dry Matter
|-
|DMI
|Dry Matter Intake
|-
|EID
|Electronic identification device
|-
|FS
|Feed Saved
|-
|PMR
|Partial mixed ration
|-
|REML
|Restricted maximum likelihood
|-
|RFI
|Residual feed intake
|-
|TMR
|Total mixed ration
|}


== Scope ==
# Provide a forum for members of ICAR and associated researchers to  collaborate, exchange information and learn from each other on all aspects of: recording and using dry matter intake data, and recording and using methane outputs data.
The scope here is to provide guidelines for of recording feed intake for genetic and genomic evaluations of feed intake and/or feed efficiency. Figure 1 illustrates the main elements of the guidelines and links for a detailed description can be found below.
# Maintain, update, promote and extend universal guidelines for recording dry matter intake and methane output in cattle, sheep and goats world-wide
# Conduct and report the results of periodic international surveys on recording dry matter intake and methane output in cattle, sheep and goats worldwide.
# Develop, provide and promote a system and standards for data storage and genetic evaluation services which will form the basis of services that ICAR will provide to members of ICAR and their research associates on a user pays basis.
# Facilitate and cooordinate international collaboration in research and development on recording and using dry matter intake data, and recording and using methane outputs data.


== Sub-sections ==
== Members ==


* Setting up feed intake recording schemes
* Christine Baes
* Recording intake indoors and at pasture
* Karoline Bakke
* Phenotypes to support feed intake in feed efficiency evaluations
* Lorenzo Benzoni
* Utilizing existing feed intake data nationally and internationally
* Raffaella Finocchiaro
* Quality control of feed intake data
* Maria Frizzarin
*
* Nina Krattenmacher
 
* Jan Lassen
== Acknowledgements ==
* Jennie Pryce
Authors of the document are, in alphabetical order:
* Caeli Richardson (2023 Brian Wickham Young Persons Exchange Program Bursary)
 
* Rasmus Bak Stephansen
''Maria Frizzarin, Teagasc, Ireland''
 
''Birgit Gredler-Grandl, Wageningen Livestock Research, Netherlands''
 
''Jan Lassen, VikingGenetics & Aarhus University, Denmark''
 
''Rasmus Bak Stephansen, Aarhus University, Denmark''
 
''Karoline Bakke Wethal, Geno, Norway''

Revision as of 08:34, 9 February 2024

Introduction Feed and Gas

Text

link

link

Objectives of the Feed and Gas WG

The objectives of the Feed and Gas WG are to:

  1. Provide a forum for members of ICAR and associated researchers to  collaborate, exchange information and learn from each other on all aspects of: recording and using dry matter intake data, and recording and using methane outputs data.
  2. Maintain, update, promote and extend universal guidelines for recording dry matter intake and methane output in cattle, sheep and goats world-wide
  3. Conduct and report the results of periodic international surveys on recording dry matter intake and methane output in cattle, sheep and goats worldwide.
  4. Develop, provide and promote a system and standards for data storage and genetic evaluation services which will form the basis of services that ICAR will provide to members of ICAR and their research associates on a user pays basis.
  5. Facilitate and cooordinate international collaboration in research and development on recording and using dry matter intake data, and recording and using methane outputs data.

Members

  • Christine Baes
  • Karoline Bakke
  • Lorenzo Benzoni
  • Raffaella Finocchiaro
  • Maria Frizzarin
  • Nina Krattenmacher
  • Jan Lassen
  • Jennie Pryce
  • Caeli Richardson (2023 Brian Wickham Young Persons Exchange Program Bursary)
  • Rasmus Bak Stephansen
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