Random regression of Hereford percentage intramuscular fat on geographical coordinates
نویسندگان
چکیده
منابع مشابه
Genetic parameters for docility, weaning weight, yearling weight, and intramuscular fat percentage in Hereford cattle.
Cattle behavior, including measures of docility, is important to beef cattle producers not only from a human safety perspective but also due to potential correlations to economically relevant traits. Field data from the American Hereford Association was used to estimate genetic parameters for chute score (CS; = 25,037), weaning weight (WW; = 24,908), yearling weight (YW; = 23,978), and intramus...
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The present study included 3,358 observations of 675 bulls and heifers from the Iowa State University beef cattle breeding project. Data were collected over a 3-yr period between 1998 and 2000. Each year, cattle were scanned four to six times for ultrasound-predicted percentage of intramuscular fat (UPFAT) and other ultrasound traits, starting at a minimum age of 28 wk. The objective of the cur...
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From the last line Gaines and Davidson (I9~3) derived the formula, F C M = M (.4q-.I5 f) or F C M = . 4 M-+-I5 F, in which FCM is milk energy in terms of pounds of natural whole cows' milk of 4 percent fat content, M is milk in pounds and F is milk fat in pounds. Recently, Bonnier, Hansson and Jarl (I946) report that the regression of milk energy per unit milk on fat percentage is not linear an...
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In this study two separate sets of data were used to develop prediction equations for Marbling Scores (MS) from actual percentage intramuscular fat. All regression parameters were significantly (P<.01) different from zero. Model-I explained only 49% of the variation in MS as compared with 83% for modelII. When these equations were validated on an independent data set, the correlations between t...
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ژورنال
عنوان ژورنال: Journal of Animal Science
سال: 2019
ISSN: 0021-8812,1525-3163
DOI: 10.1093/jas/skz359