Paul Abiyong | University Of Agriculture, Makurdi (original) (raw)
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Papers by Paul Abiyong
Journal of Animal Science, Jan 1, 1983
Recent progress in quantitative genetics has contributed to more efficient animal production thro... more Recent progress in quantitative genetics has contributed to more efficient animal production through better understanding of the underlying genetic model, genetic parameters, breeding objectives, selection methods and breeding systems necessary to engineer useful genetic changes in animal performance. Biochemical genetics research affirms fewer cistron units but a higher proportion segregating than expected, with frequent recombination within units and reasons for important roles of linkage and pleiotropy. Production system simulation has emphasized that relative economic importance of improved reproductive rate, growth and body composition differs greatly between animal species, production-marketing environments and breed roles. Theory, simulation and selection experiments with laboratory and domestic species have demonstrated: 1) the large effective number of genes controlling quantitative traits; 2) importance of adverse pleiotropic or epistatic effects on reproductive fitness from extreme selection for metric traits, suggesting overdominance for combined natural and imposed selection in semi-plateaued populations and across varied environments; 3) potential loss in response with relaxed selection from either adverse maternal effects or epistatic recombination and natural selection and 4) importance of large size and optimum structure of population, information on relatives, accurate economic weights and genetic parameters to a The authors are indebted to Drs. G. E. Bradford, L. V. Cundiff and D. L. Harris for critical review of the manuscript and many helpful suggestions.
2003 Swine Research …, Jan 1, 2003
North Central Journal …, Jan 1, 1989
DETERMINANTS OF PROFITABILITY IN FARROW-TO-FINISH SWINE PRODUCTION William M. Edwards, Grytsje T.... more DETERMINANTS OF PROFITABILITY IN FARROW-TO-FINISH SWINE PRODUCTION William M. Edwards, Grytsje T. van der Sluis and Emmett J. Stevermer ... Burt and Fin-ley suggested that the relative importance of two multiplicative variables, xI and X2, could be estimated by: ...
Journal of Animal Science, Jan 1, 1983
Recent progress in quantitative genetics has contributed to more efficient animal production thro... more Recent progress in quantitative genetics has contributed to more efficient animal production through better understanding of the underlying genetic model, genetic parameters, breeding objectives, selection methods and breeding systems necessary to engineer useful genetic changes in animal performance. Biochemical genetics research affirms fewer cistron units but a higher proportion segregating than expected, with frequent recombination within units and reasons for important roles of linkage and pleiotropy. Production system simulation has emphasized that relative economic importance of improved reproductive rate, growth and body composition differs greatly between animal species, production-marketing environments and breed roles. Theory, simulation and selection experiments with laboratory and domestic species have demonstrated: 1) the large effective number of genes controlling quantitative traits; 2) importance of adverse pleiotropic or epistatic effects on reproductive fitness from extreme selection for metric traits, suggesting overdominance for combined natural and imposed selection in semi-plateaued populations and across varied environments; 3) potential loss in response with relaxed selection from either adverse maternal effects or epistatic recombination and natural selection and 4) importance of large size and optimum structure of population, information on relatives, accurate economic weights and genetic parameters to a The authors are indebted to Drs. G. E. Bradford, L. V. Cundiff and D. L. Harris for critical review of the manuscript and many helpful suggestions.
2003 Swine Research …, Jan 1, 2003
North Central Journal …, Jan 1, 1989
DETERMINANTS OF PROFITABILITY IN FARROW-TO-FINISH SWINE PRODUCTION William M. Edwards, Grytsje T.... more DETERMINANTS OF PROFITABILITY IN FARROW-TO-FINISH SWINE PRODUCTION William M. Edwards, Grytsje T. van der Sluis and Emmett J. Stevermer ... Burt and Fin-ley suggested that the relative importance of two multiplicative variables, xI and X2, could be estimated by: ...