Relationships among Lactation and Reproduction Traits of Dairy Goats
نویسندگان
چکیده
منابع مشابه
Relationships between the Polymorphism of Blood Proteins and Some Reproduction Traits in Norduz Goats
The aim of this study was to determine the influences of polymorph systems such as hemoglobin and transferrin types on some the reproduction traits in Norduz goats. The material of this study consisted of 65 Norduz goats. The polymorphism of hemoglobin and transferrin phenotypes of Norduz goats were determined. Blood proteins were analyzed through horizontal starch gel electrophoresis. It was f...
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Early lactation parameters are difficult to estimate from commercial dairy records due to the small number of records available before the peak of production. A biological model of lactation was used with weekly milk records from a single Holstein herd to estimate these early lactation parameters and the secretion rate of milk from the average cell throughout lactation. A genetic analysis of th...
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The objectives were to estimate (co)variance components and genetic parameters for lactation curve traits in Holstein dairy cows in Iran. The used data were records on Holstein cows collected during January 2003 to December 2012 by the Animal Breeding Center of Iran (Karaj, Iran). In order to describe the lactation curve, an incomplete gamma function was fitted to 691200 test-day records on 962...
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Multiparous Alpine does (42) were used to determine how stage of lactation and dietary forage level affect body composition. The feeding and body composition portion of the study had a 2 x 3 factorial arrangement of treatments. Eighteen does were fed a 40% forage diet (40F) and 18 received a diet with 60% forage (60F) for approximately 2, 4, or 6 mo of lactation (59 +/- 1.3, 116 +/- 1.0, and 18...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 1983
ISSN: 0022-0302
DOI: 10.3168/jds.s0022-0302(83)82031-1