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Relationships among Lactation and Reproduction Traits of Dairy Goats¹

Department of Dairy Science, University of Illinois at Urbana-Champaign, Urbana 61801

G. R. Wiggans

Animal Improvement Programs Laboratory, Agricultural Research Service, United States Department of Agriculture, Beltsville, MD 20705

² Reprint requests.

ABSTRACT

Statistics for reproduction and lactation traits were estimated from 51,826 records of Alpine, La Mancha, Nubian, Saanen, and Toggenburg does. Means and standard deviations varied little across breed or lactation number. Relationships among reproduction and lactation traits were estimated from a subset of 42,618 records with 125 days or more in milk. Correlations also were stable across breed and lactation number. Regression analysis indicated a curvilinear relationship between lactation traits and reproduction traits.

¹ Supported in part by the Illinois Agricultural Experiment Station, the University of Illinois Research Board, and Cooperative Agreement 58-32U4-1-266.