Researchers analyzed records from six pure breeds of dairy goats to determine genetic parameters and changes over time in various production and reproductive traits. Three kidding periods were examined: 1976-1984, 1985-1994, and 1995-2005.
Saanens had the highest milk (2339-2496 lbs.) and protein yields. Nubians had the highest fat yields and lowest milk yields (1740-1872 lbs). Oberhaslis had the lowest fat and protein yields. Alpines showed the largest increase in milk yield over time (7.4%).
Sannens were the oldest at first kidding (509-589 d). Toggenburgs and LaManchas were usually the youngest (435-545 d). Kidding intervals were usually shorter for Oberhaslis, LaManchas, and Nubians (350-377 d) than for Toggenburgs, Alpines, and Saanens (373-387 d).
Heritability estimates across breeds were determined.
The researchers concluded that genetic selection within breed is feasible for production and reproduction traits of U.S. dairy goats.
Source: Journal of Dairy Science, 2012. Read full article.
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| Saanens had the highest milk yield. |
Sannens were the oldest at first kidding (509-589 d). Toggenburgs and LaManchas were usually the youngest (435-545 d). Kidding intervals were usually shorter for Oberhaslis, LaManchas, and Nubians (350-377 d) than for Toggenburgs, Alpines, and Saanens (373-387 d).
Heritability estimates across breeds were determined.
The researchers concluded that genetic selection within breed is feasible for production and reproduction traits of U.S. dairy goats.
Source: Journal of Dairy Science, 2012. Read full article.
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