Relationship between expected progeny differences of Canadian Hereford sires and performance of their progeny in commercial herds
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منابع مشابه
Relationship between milk expected progeny differences of polled Hereford sires and actual milk production of their crossbred daughters.
One hundred sixteen spring-calving Polled Hereford x Angus cows were milked using milking machines after receiving 20 IU of oxytocin. Sires of the cows had been divergently selected on yearling weight (YW) and total maternal (MAT) EPD to form four groups: high YW, high MAT EPD; high YW, low MAT EPD; low YW, high MAT EPD; and low YW, low MAT EPD. Average milk production after 12-h calf separatio...
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15 صفحه اولUnderstanding Expected Progeny Differences (EPDs)
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متن کاملHeritability and repeatability of Hereford show-ring placing and associated correlations with individual performance measurements and expected progeny differences.
Data associated with 1,531 Herefords shown at the National Western Stock Show at Denver from 1978 to 1984 were used to estimate heritability and repeatability of show-ring placing (SRP) and genetic, environmental and phenotypic correlations. The correlations were those between: SRP and individual measurements (IM) taken at the time of show and available to the judges, SRP and parents' SRP and I...
متن کاملGrowth of crossbred progeny of polled Hereford sires divergently selected for yearling weight and maternal ability.
Polled Hereford sires (n = 47) were divergently selected on published yearling weight (YW) and maternal (MAT) expected progeny differences (EPD) and mated to grade Angus cows to produce 457 calves in five spring calf crops. Sires selected for high and low YW differed by an average of 6.3 kg in YW EPD and those selected for high and low MAT differed by an average of 4.0 kg in MAT EPD based on 19...
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ژورنال
عنوان ژورنال: Canadian Journal of Animal Science
سال: 1994
ISSN: 0008-3984,1918-1825
DOI: 10.4141/cjas94-078