Using Indexes

Indexes allow for selection pressure on multiple traits at the same time, depending on a producer’s breeding objectives. Producers today are likely to believe more than a single trait is important. Furthermore, it is not difficult to believe selection for one trait would impact other traits as well. For example, selection for increased weaning weight is likely to result in increased yearling weight and average daily gain. While Igenity Profiles provide index values centered around total production, maternal, or terminal breeding programs, the beef dashboard allows individuals to also design an index tailored to their needs.


Igenity Production Index

The Igenity Production index balances maternal traits with gain and carcass characteristics, placing a large emphasis on stayability and marbling, with a negative emphasis on residual feed intake.

This index is designed for producers wanting to keep their own replacement females while marketing calves at harvest on a grid.

*Herd results may vary dependent on individual selection intensity.

Reading the Chart

Selection Pressure: The amount of emphasis placed on the animal’s breeding value for that trait.

Traits: Each MBV reported in an Igenity Beef Profile.

Impact on 1-10 Scores: This is the estimated change in Igenity scores following one generation of selection using this index. These impacts are graphically provided in the chart.

Production Index Trends – How to Interpret

  • Significant increases in marbling and ADG due to larger emphasis.
  • Igenity score for stayability increased almost a full point.
  • Overall a positive increase in maternal, terminal, growth, and maintenance traits.

Igenity Maternal Index

The Igenity Maternal index places emphasis on fertility, reproduction and weaning weight, with a negative emphasis on yearling weight. This is an attempt to control mature cow size in those heifers chosen as replacements.

This index is designed for producers wanting to keep their own replacement females and market calves at weaning.

Reading the Chart

Selection Pressure: The amount of emphasis placed on the animal’s breeding value for that trait.

Traits: Each MBV reported in an Igenity Beef Profile.

Impact on 1-10 Scores: This is the estimated change in Igenity scores following one generation of selection using this index. These impacts are graphically provided in the chart.

Maternal Index Trends – How to Interpret

  • Improved stayability and cow maintenance trends.
  • Modest increases in milk.
  • Still favorable impacts on gain and carcass traits.

*Herd results may vary dependent on individual selection intensity.


Igenity Terminal Index

The Igenity Terminal index is specialized to identify animals for terminal crossbreeding. It places the most emphasis on hot carcass weight, followed by marbling and rib eye area. There is, however, a negative emphasis placed on residual feed intake and fat thickness to control feed costs.

This index is designed for producers who have an integrated system that uses terminal bulls on maternal-focused cows and/or retain ownership of progeny to harvest on a grid.

*Herd results may vary dependent on individual selection intensity.

Reading the Chart

Selection Pressure: The amount of emphasis placed on the animal’s breeding value for that trait.

Traits: Each MBV reported in an Igenity Beef Profile.

Impact on 1-10 Scores: This is the estimated change in Igenity scores following one generation of selection using this index. These impacts are graphically provided in the chart.

Terminal Index Trends – How to Interpret

  • Substantial increases in terminal traits including average daily gain, weight traits, rib eye area and marbling.
  • Mild effects on birth weight and calving ease.