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The anthelmintics resistance of nematodes in sheep, cattle, horses and sows was investigated on 4 farms in North-West part Poland. The farms were visited thrice before and twice 7 and 14 days after treatment. During the first visit, groups of 10 animals were formed. All animals were weighted before treatment and from each animal faecal samples were individually taken. One group in each farm remained...
Direct and maternal additive genetic variances as well as covariances between these effects were estimated via derivative-free restricted maximum likelihood algorithm under an animal model. 2750 half-bred mares from four Studs were recorded. The following three traits were analysed: height of wither, circumference of chest, circumference of canon. The breed group, year of birth and place of birth...
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