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Updated: Jun 13, 2026

Exploring the Longissimus Muscle: Unraveling its Correlation with Meat Quality in Bos indicus and Crossbred Bulls

Exploring the Longissimus Muscle: Unraveling its Correlation with Meat Quality in Bos indicus and Crossbred Bulls

Published on: July 12, 2024

An exploratory observational study to develop an improved method for quantifying beef carcass salable meat yield.

R L Farrow¹, G H Loneragan, J W Pauli

¹Department of Agricultural Sciences, West Texas A&M University, Box 60998, Canyon, TX 79016, USA.

|April 27, 2010

Summary

This summary is machine-generated.

Accurate prediction of beef carcass salable meat yield is possible using specific composition indicators. Hot carcass weight and fat measurements improve current USDA yield grading accuracy.

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Area of Science:

Animal Science
Meat Science
Agricultural Engineering

Background:

Accurate prediction of beef carcass salable meat yield is crucial for the beef industry.
Current USDA yield grading methods may not fully capture carcass composition variations.

Purpose of the Study:

To identify objective composition indicators that best predict closely trimmed salable meat yield in grain-finished steers.
To evaluate the efficacy of existing and novel carcass measurements for yield prediction.

Main Methods:

Eighty-seven grain-finished steers were evaluated post-harvest.
Image analysis software (Assess) objectively measured lean and fat composition indicators at the 12th-13th rib interface.
Regression models were developed using indicators like hot carcass weight (HCW), perinephric fat weight, longissimus muscle area (LMA), and subcutaneous fat thickness (SFT).

Main Results:

Salable meat yield varied significantly, ranging from 50.18% to 72.92%.
Key predictors of salable meat yield included HCW, perinephric fat weight, LMA, SFT, and ratios involving these measures.
The developed regression models demonstrated potential for improved yield prediction.

Conclusions:

Objective carcass composition indicators can significantly enhance the prediction accuracy of beef salable meat yield.
Modifications to the current USDA yield grade equation, incorporating additional measures, are recommended.
This research provides a foundation for more precise beef carcass value assessment.