L.J. Isaac  , O. Olutogun  , 
    The Performance of Holstein-Friesian, Bunaji and their Cross Breds in a Tropical Environment,
    Journal of Animal and Veterinary Advances,
    Volume 6,Issue 1,
    2007,
    Pages 129-131,
    ISSN 1680-5593,
    javaa.2007.129.131,
    (https://makhillpublications.co/view-article.php?doi=javaa.2007.129.131)
    Abstract: Total lactation (Tolac-kg) and lactation days (Lacdays-days) were measured to assess the performance of Holstein Friesians, Bunaji and their Cross breds using records from 70 animals consisting of 18 pure bred Holstein-Friesians dams (HF dam), 18 pure bred Friesian daughters (HF daughters), 17 Bunaji dams (BB dams) and 17 Bunaji daughters (BB daughter-F1 cross bred). The natural logarithm procedure was applied to the original data to homogenize the variance and the mean. This was then analysed using the general linear model procedure in a model that considered the dam’s records as the independent and the daughter’s records as the dependent variables. Result showed that Tolac for the 3 cattle genotype was significantly (p<0.05) different, while Lacdays showed no significant (p>0.05) difference, when their means were compared.
    Keywords: Performance;Holstein-Friesian;Bunaji;crossbred;tropical environment