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Hartwig S.,Institute For Tierhaltung Und Tierzuchtung | Bennewitz J.,Institute For Tierhaltung Und Tierzuchtung
Zuchtungskunde | Year: 2014

While high yielding breeds become more and more popular, local breeds become less important. But loss of their genetics means simultaneously loss of cultural values and loss of genetic diversity. The challenge of conservation breeding program is to realise genetic progress and keep genetic diversity and genetic autonomy. This conflict of goals can be solved by systematically implementation of adapted breeding methods. Genomic selection is not an option at the moment, but might become interesting tool in the future. Preparation and further analyses are of importance. Additionally, the implementation of special alternative traits might be helpful for conservation of local breeds. © Verlag Eugen Ulmer, Stuttgart. Source


Henseler S.,Institute For Tierhaltung Und Tierzuchtung | Preuss S.,Institute For Tierhaltung Und Tierzuchtung | Bennewitz J.,Institute For Tierhaltung Und Tierzuchtung
Zuchtungskunde | Year: 2014

This study examined different breeds of sheep to determine which one is most suitable a sire breed for the Merinolandschaf, a Merino land race, in order to produce high quality lambs for slaughter. For this purpose, the study "Suitability of Merinoiandschaf for Crossbreeding" using the sire breeds Charollais, lie de France, Merinolandschaf, Blackhead sheep, Suffolk and Texel was complemented by a sensory analysis. 105 animals were chosen from a total of 1600 lambs used in the study. These were tasted by a panel consisting of 21 persons. Results of this sensory analysis were combined with results in regard to fattening performance, yield at slaughter and quality of meat in a joint index. The sensory analysis showed that crossbreeds with Charollais, Blackhead sheep and Suffolk as well as the pure breed Merinolandschaf are well suited to production of high-quality lamb's meat. In addition, it was shown that lamb's meat from the German federal state of Baden-Wurttemberg differs significantly from lamb's meat from New Zealand. There is a significant negative correlation between shear force according to Warner-Bratzler and the perceived tenderness of meat. The joint index consists of 10 economically relevant parameters, relatively weighted according to economic factors. The first rank was achieved by the crossbreed with lie de France, followed by Texel, Suffolk and Blackhead sheep. To choose the optimal rams, i.e. the optimal sire breed, under practical circumstances, it is vital to take the conditions of the individual farm - such as marketing strategies - into consideration. With different weighting of single traits ranldng of breeds can differ. © Verlag Eugen Ulmer, Stuttgart. Source

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