Die Genauigkeit von Ejakulatsuntersuchungen zur Bestimmung der Befruchtungsfähigkeit von Bullensperma

Beziehung zwischen Libido und Deckvermogen (rp = .87). Desweiteren konnten deutliche Beziehungen zwischen Dichte und pH-Wert, sowie Massenbewegung festgestellt werden (rDi1pf.I = -.47; rDi MBW = .46). Darauf aufbauend errechnete sich eine ahnliche Beziehung zwischen pfi-Wert und Massenbewegung (rp = .42). Anhand der Halbgeschwisteranalyse wurden fur die Spermamerkmale geringe (pH-Wert, h 2 = .065; Massenbewegung h2 = .086) bis mittlere (Dichte, h2 = .21; Volumen, h2 = .13) HeZitabilitaten geschatzt. Desweiteren ging aus den Ergebnissen hervor, dafl sich die Spermamerkmale Volumen und Massenbewegung seit dem Jahrgang 1980181 und die Dichte seit dem Jahrgang 1975/76 verschlechtert haben. Nach Uberpriifung der Umwelt-und der genetischen Einfliisse auf die Spermamerkmale konnte festgestellt werden, dab die Verschlechterung der Spermamerkmale umweltbedingt war. Letztendlich ergab die Analyse, dap Spermamerkmale, wie Volumen und Dichte, als rassenspezifisch anzusehen sind. Contents: Analysis of informations about the seminal quality of the Angler breed.The data were collected from 1141 young bulls in the age of 12-15 months at the A.I. station of Verband der Angler Rinderziichter, Siiderbrarup, Schleswig-Holstein (FRG). From 1975 to 1984 data of 3604 e'aculates were investigated. Significant factors influencing semen characters were 2nJservice at the same day, season of birth, season of service, libido and sexual behavior. There was narrow correlation between libido and sexual behavior (rp=.87). A s well there could be established a clear correlation between density and pH-value (rp = -.47) and between density and motility (rp = .46). Following heritabilities f o r semen characters were estimated: volume h2 = .13, density h2 = .21, pH h 2 = .065 and motility h Z = .086). The results indicated, that the semen characters, volume and motility, have changed for the worse since the age-group 19801 81. The density already has changed for the worse since the age-group 1975176. After checking the environmental influences and the genetic influences on semen characters, it could be established, that the worsening of the semen characters were caused by environmental influences. A s well it could be recognized, that the semen characters, as volume and density, were considered as a peculiarity of a breed. U.S.

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Die Genauigkeit von Ejakulatsuntersuchungen zur Bestimmung der Befruchtungsfähigkeit von Bullensperma

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Züchterische Probleme in der Fortpflanzung mit besonderer Berücksichtigung der künstlichen Besamung

Züchterische Probleme in der Fortpflanzung mit besonderer Berücksichtigung der künstlichen Besamung

Anaylse von Spermaqualitätsformationen aus dem Zuchtprogramm des Angler Rindes

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