Document Detail


Genetic parameters for growth performance of the Malaysian local goats and their crossbreds with the German (improved) Fawn goats.
MedLine Citation:
PMID:  21395815     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
Growth performance data of the local goats of Malaysia and their crossbreds with the German (Improved) Fawn goats were analysed using animal models with maternal effects, in order to estimate additive genetic and crossbreeding parameters. Two different genetic models, the Dickerson (1969, 1973) model and the Kinghorn (1980, 1983) model, were used to estimate crossbreeding parameters. Coefficients of additive breed, heterosis (dominance), and recombination (epistatic) loss were fitted in the animal models as covariates. In general, the individual breed effects for birth, 6-month, and 9-month weights, and maternal breed effects for traits until weaning, were significant, indicating large differences for growth performance between the German Fawn and the local breeds. Heterosis effects by the Dickerson model were small and non-significant, while dominance effects by the Kinghorn model, for some of traits, were large and significant. Highly significant individual recombination loss effects by the Dickerson model, and epistatic loss effects by the Kinghorn model, were obtained for birth and 9-month weights. The estimates of total heritability by an animal model incorporating maternal effects were moderate (0.18-0.35). The differences between heritabilities, estimated by different genetic models (the Dickerson model vs. the Kinghorn model), were small. ZUSAMMENFASSUNG: Genetische Parameter von Wachstumseigenschaften Malaysischer Lokalziegen und ihrer Kreuzung mit Deutscher Rehbrauner Ziege Die Daten wurden mittels Tiermodellen mit Maternalwirkung zur Schätzung additiv genetischer und Kreuzungsparameter analysiert. Zur Schätzung letzterer wurden Modelle von Dickerson (1969, 1973) und Kinghorn (1980, 1983) angewendet. Koeffizienten der additiven Rassenwirkungen, Heterosis (Dominanz) und Rekombinations-wirkungen wurden im Tiermodell als Kovarialbe berücksichtigt. Im allgemeinen waren individuelle Rassenwirkungen für Geburts-, 6- und 9-Monatsgewicht und maternale Rassenwirkungen für Merkmale während der Säugezeit signifikant, eine Folge großer Rassenunterschiede. Das Dickerson Modell führte zu geringen, nicht signifikanten Heterosiswirkungen, während beim Kinghorn Modell diese sich für mehrere Merkmale als groß und signifikant erwiesen haben. Hoch signifikante individuelle Rekombinationsverluste und epistatische Verluste ergaben sich bei beiden Modellen für Geburtsgewicht und 9 Monatsgewicht. Heritabilitätswerte waren mäßig hoch (0.18 bis 0.35), enthielten auch die maternalen Wirkungen und unterschieden sich zwischen beiden Modellen nur geringfügig.
Authors:
H Hirooka; T K Mukherjee; J M Panandam; P Horst
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of animal breeding and genetics = Zeitschrift für Tierzüchtung und Züchtungsbiologie     Volume:  114     ISSN:  0931-2668     ISO Abbreviation:  J. Anim. Breed. Genet.     Publication Date:  1997 Jan 
Date Detail:
Created Date:  2011-03-14     Completed Date:  2012-10-02     Revised Date:  2013-05-20    
Medline Journal Info:
Nlm Unique ID:  100955807     Medline TA:  J Anim Breed Genet     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  191-9     Citation Subset:  -    
Copyright Information:
1997 Blackwell Verlag GmbH.
Affiliation:
Faculty of Economics, Ryukoku University, Fushimi-ku, Kyoto, Japan Department of Genetics and Cellular Biology, University of Malaya, Kuala Lumpur, Malaysia Department of Animal Science, Faculty of Veterinary Medicine and Animal Science, UPM, Serdang, Malaysia Faculty of Agriculture and Horticulture, Humboldt University of Berlin, Berlin, Germany.
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