Wednesday, January 30, 2013

Production traits of dairy goats

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 yield.
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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