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The objective of the study was to determine beef production traits of dairy and dairy × beef breed crossbred heifers. The data from Finnish slaughterhouses included observations of 14 221 Nordic Red (NR), 6 348 Holstein-Friesian (Hol), 1 626 NR × Aberdeen Angus (NR × Ab), 1 136 NR × Blonde d’Aquitaine (NR × Ba), 802 NR × Charolais (NR × Ch), 487 NR × Hereford (NR × Hf), 3 699 NR × Limousin (NR × Li), 827 NR × Simmental (NR × Si), 531 Hol × Ab, 467 Hol × Ba, 438 Hol × Ch, 186 Hol × Hf, 1 249 Hol × Li and 393 Hol × Si heifers. Crossbreeding with late maturing beef breeds (Ba, Ch, Li, Si) had favourable effects both on daily carcass gain and carcass quality traits (conformation, proportion of high value joints) of the progeny when compared to purebred dairy heifers. No advantages in proportion of high value joints seemed to be obtained by crossbreeding dairy cows with Ab or Hf breeds, while the improvements in daily carcass gain and carcass conformation score were intermediate compared to the late maturing crossbreds.
This study evaluated the effect of the linearly described shape traits of goat udders on somatic cell count. In a herd of 487 white shorthaired goats, seven traits (udder symmetry, udder depth, udder width, teat length, teat placement, rear udder attachment and udder cleft) were assessed in relation to somatic cell count in milk. The average somatic cell count was 1.3 mill cells/ml when considering the environmental effects (month and year of performance testing, lactation number. The somatic cell count is influenced by the depth (p = 0.0015) and width (p = 0.0268) of the udder. The results demonstrate that some traits of the udder shape influence the somatic cell count and can be considered as functional traits indicating animal health and herd profitability. After further studies, the methodology for linear description of the udder could be used for other dairy goat breeds, not only in the Czech Republic.
White Short-Haired (WSH) and Brown Short-Haired (BSH) are two protected local goat dairy breeds in Czech Republic. A genetic characterization of both breeds is necessary to preserve them from extinction and to exploit their genetic variation. For this purpose a study was carried out on the genetic polymorphism of the CSN2 and CSN3 loci. Genomic analysis was performed by PCR method. Both breeds were characterized by the absence of CSN20 allele. The CSN3 locus was found polymorphic, with the CSN3A, CSN3B and CSN3C alleles frequency of 0.15, 0.80 and 0.05 in WSH and 0.52, 0.40 and 0.08 in BSH, respectively.
The study was aimed to determine an effect of various feed mixes on finishing White Improved billies reared until 6 months of age. The experiment was carried out in three replications. The study focused on the following sets of traits: body weight gain, feed consumption per weight gain, carcass and half-carcass measurements, slaughter performance and carcass tissue composition. The experiment has shown that farm-made balanced diets, which have a slightly lower level of protein but are richer in fibre, can be successfully used in feeding finishing White Improved billies. Namely, animals fed on this diet, although showing some performance parameters slightly reduced, achieved their slaughter value and meat quality similar to those fed on commercial CJ feed.
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