Results 31 to 40 of about 8,210 (222)
Environmental effects, population genetic parameters, breeding value, phenotypic and genetic trend for age at first calving of Limousin cows [PDF]
Journal of Central European Agriculture, 2021 Some environmental effects, population genetic parameters, breeding value of Limousin breeding bulls, also phenotypic and genetic trends in the age at first calving (AFC) of cows between 1992 and 2013 were estimated.
Szabolcs Bene +5 more
doaj +1 more source
Journal of the Indonesian Tropical Animal Agriculture, 2014 The aim of this study was to evaluate effect of non genetic factors on reproductive performance ofBali cattle. Data on reproduction performance were collected from Breeding Centre of Bali Cattle inDenpasar-Bali.
A. Gunawan +3 more
doaj +1 more source
Journal of Dairy Science, 1985 Mean ages at first calving were computed from over 6 million cow records from 1960 through 1982 for six breeds. Average Jerseys first calved at 26.18 mo compared with 28.75 mo for Ayrshires. Other breed means were intermediate: Holsteins, 27.52 mo; Guernseys, 27.72 mo; Brown Swiss, 28.04 mo; and Milking Shorthorns, 28.11 mo.
openaire +2 more sources
GENETIC ANALYSIS OF REPRODUCTIVE TRAITS IN BALI CATTLE MAINTAINED ON RANGE UNDER ARTIFICIALLY AND NATURALLY BRED [PDF]
Journal of the Indonesian Tropical Animal Agriculture, 2011 The aim of this study was to evaluate genetic analysis including heritability and further phenotypic and genetic trends of reproductive traits in Bali cattle.
A. Gunawan, R. Sari, Y. Parwoto
doaj
Association between age at first calving and milk production in first lactation on longevity traits in Holstein cows [PDF]
Biotechnology in Animal Husbandry, 2020 The objective of this research was to determine the association between age at first calving (AFC) and milk production in the first lactation of longevity traits for Holstein cows. The research was conducted on 2307 cows raised on 4 farms in AP Vojvodina.
Kučević Denis +6 more
doaj
Indian Journal of Animal Sciences, 2020 Adequate numbers of progeny tested bulls are not available in India and whatever small number of bulls are progeny tested, they have low repeatability as the progeny tests are based on small number of daughters mostly reared at the institutional farms ...
A K DAS +10 more
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Journal of Dairy Science, 1917 The most desirable age for the first parturition with cows is a very important question. In a great many herds it is certain that the method of raising heifers is not such as to permit full development of their inherited powers of production. Prof. F. W. WQll in Research Bulletin No.
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Productive life in buffalo cows and effect of some factors on it
Italian Journal of Animal Science, 2010 Subject of investigation were 3989 buffaloes from the Bulgarian Murrah breed during the period 1976 – 2003. The productive life (PL) is determined as the period between date of first calving to the date of last milking, before culling.
T. Peeva, Y. Ilieva
doaj +1 more source
The age at first calving and the longevity of beef cows in Hungary [PDF]
Archives Animal Breeding, 2006 Abstract. The length of time beef cows spend in production is an important component of the rentability of beef cattle husbandry. In spite of this fact, very few publications have dealt with this trait, either in Hungary or abroad. Therefore the aim of the present study was to evaluate some of the age parameters of beef cows related to the production ...
Dákay, I. +5 more
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Journal of Dairy Science: This study aims to determine the effects of feeding, management, and reproductive strategies used to reduce age at first calving (AFC) on production and reproductive performance through meta-analytic methods.
A.K.G. Lean +5 more
doaj +1 more source