What is the focus of meat/terminal sire breeds of sheep?

The focus of meat or terminal sire breeds of sheep primarily revolves around feed efficiency and muscularity. These breeds are specifically developed and selected for traits that enhance growth rates and meat production capabilities. They tend to have a robust musculature, allowing for better meat yield and quality. The emphasis on feed efficiency ensures that they convert feed into body mass effectively, making them more economically viable for meat production.

In contrast, other options, such as milk production, fleece quality, or small fiber diameter, pertain more to different breeding objectives and sheep types. Breeds focused on dairy production prioritize traits that enhance milk yield and composition, while those valued for fleece quality are cultivated for their wool characteristics rather than meat. Small fiber diameter relates specifically to the fineness of wool, which is another distinct breeding trait unrelated to meat production. Hence, the selection criteria for terminal sire breeds are uniquely aligned with enhancing meat traits, making feed efficiency and muscularity the central focus.