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Genetische Aspekte von Leistungs‐ und Reproduktionsmerkmalen in einer Murrah Büffel Herde in São Paulo, Brasilien
Author(s) -
Tonhati H.,
Vasconcellos F. B.,
Albuquerque L. G.
Publication year - 2000
Publication title -
journal of animal breeding and genetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.689
H-Index - 51
eISSN - 1439-0388
pISSN - 0931-2668
DOI - 10.1046/j.1439-0388.2000.00249.x
Subject(s) - heritability , ice calving , herd , murrah buffalo , restricted maximum likelihood , biology , zoology , variance components , repeatability , maximum likelihood , genetic correlation , reproduction , lactation , veterinary medicine , statistics , genetic variation , mathematics , genetics , pregnancy , medicine , gene
Summary This study investigated genetic trends of some productive and reproductive traits in a herd of Murrah buffalo raised in São Paulo, Brazil. Variance components for milk production (MP), length of lactation (LL), calving interval (CI) and age of first calving (AFC) were estimated by the restricted maximum likelihood method, using an animal model. Estimated heritability values were 0.38; 0.01; 0.10 and 0.20 for MP, LL, CI and AFC, respectively. Estimated repeatability values were 0.50, 0.13 and 0.20 for MP, LL and CI, respectively. Means of predicted breeding values for cows, dams and sires according to calving year and the genetic correlations were presented.