Results 351 to 360 of about 44,319 (379)
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Dairy cattle crossbreeding in the tropics: Choice of crossbreeding strategy
Tropical Animal Health and Production, 1996Two strategies for crossbreeding of indigenous and exotic cattle for milk production in the tropics, viz. rotational crossing and formation of a composite breed, have been compared. Genetic considerations suggest that rotational crossing would lead to somewhat better dairy performance, mainly because of more heterozygosity.
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The basis of crossbreeding in pigs; A review
Livestock Production Science, 1976Abstract A survey of the different parameters involved in crossbreeding is given following the analysis of Dickerson (1969). The genetic gain resulting from crossbreeding has a double origin: complementarity and heterosis. The practical importance of these two advantages is evaluated in swine.
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World's Poultry Science Journal, 1977
A review of the literature pertaining to heterosis and crossbreeding techniques in poultry. An attempt has been made to summarize in a table the findings for important traits, viz.
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A review of the literature pertaining to heterosis and crossbreeding techniques in poultry. An attempt has been made to summarize in a table the findings for important traits, viz.
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Crossbreeding and Meat Quality in Pigs [PDF]
, 1987 A review is presented on heterosis for meat quality. The classical view, i.e. no significant heterosis, is to be revised to some extent when considering specific meat quality traits in specific crosses. Evidence is presented for two main deviations from additive inheritance of breed differences in crossing.
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Journal of Food Science, 2018
The main goal of crossbreeding Holstein-Friesian (HF) cows with bulls of other dairy or combined breeds is to improve their performance traits. Thus, the aim of this investigation was to compare the dairy performance traits of first generation crossbreds
K. Puppel +9 more
semanticscholar +1 more source
The main goal of crossbreeding Holstein-Friesian (HF) cows with bulls of other dairy or combined breeds is to improve their performance traits. Thus, the aim of this investigation was to compare the dairy performance traits of first generation crossbreds
K. Puppel +9 more
semanticscholar +1 more source
The Utilization of Mutants in Crossbreeding
1983The experiences, obtained in mutation breeding, show that it is possible in principle to develop a commercial variety directly from an induced mutant. According to the results available in this field, it is, however, the opinion of many geneticists, that the utilization of useful mutants in crossbreeding programs is more prospective.
Werner Gottschalk, Gisela Wolff
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Journal of Animal Science, 2016
The aim of this study was to estimate the genetic and environmental parameters and crossbreeding effects on fatty acid and fat traits in the Iberian pig. Our final goal is to explore target selection traits and define crossbreeding strategies.
N. Ibáñez-Escriche +4 more
semanticscholar +1 more source
The aim of this study was to estimate the genetic and environmental parameters and crossbreeding effects on fatty acid and fat traits in the Iberian pig. Our final goal is to explore target selection traits and define crossbreeding strategies.
N. Ibáñez-Escriche +4 more
semanticscholar +1 more source
Journal of Animal Breeding and Genetics, 1995
SummaryStarting with the consideration of a two‐locus system of a diploid organism, a general model for crossbreeding parameters, including additive, dominance, additive × additive, additive × dominance and dominance × dominance effects, is derived. A general procedure for the calculation of the coefficients of the crossbreeding parameters is described.
J. Hyánek +4 more
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SummaryStarting with the consideration of a two‐locus system of a diploid organism, a general model for crossbreeding parameters, including additive, dominance, additive × additive, additive × dominance and dominance × dominance effects, is derived. A general procedure for the calculation of the coefficients of the crossbreeding parameters is described.
J. Hyánek +4 more
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"Crossbreeding" Geographical Quantities
Geographical Review, 1955A s INCONCEIVABLE as a "boneless vertebrate" is a "nonquantitative geography." Estimates and measurements of terrestrial magnitudes-distances, directions, dimensions-have always constituted the framework of geographical knowledge. There are, however, degrees and standards of "quantitivity." Those attained by Eratosthenes and Ptolemy were comparatively ...
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Journal of Zhejiang University-SCIENCE A, 2002
The reproduction characteristics of 343 sows in six different breeding groups were analyzed to estimate the crossbreeding parameters. The results indicated that the ovulation rate and the weights of uterus and ovary are mainly determined by the additive genetic effects while the nonadditive genetic effects play an important role in embryonal traits and
Dong Niu, Hai-yan Chen, Hui Ruan, Yan Fu
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The reproduction characteristics of 343 sows in six different breeding groups were analyzed to estimate the crossbreeding parameters. The results indicated that the ovulation rate and the weights of uterus and ovary are mainly determined by the additive genetic effects while the nonadditive genetic effects play an important role in embryonal traits and
Dong Niu, Hai-yan Chen, Hui Ruan, Yan Fu
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