Avtor/Urednik		von Wittmann, W; Peschke, W; Littmann, E; Behringer, J; Birkenmaier, S; Dovč, P; Foerster, M
Naslov		Mast- und Schlachtleistungen von DL-Kastraten in Abhaengigkeit vom MHS-Genotyp
Prevedeni naslov		Fattening and carcass performance traits of German landrace castrates genetically differentiated by the MHS-gene-test
Tip		članek
Vir		Zuechtungskunde
Vol. in št.		Letnik 65, št. 3
Leto izdaje		1993
Obseg		str. 197-205
Jezik		ger
Abstrakt		With the aid of the MHS-gene-test the genotypes of the dispositions for the development of the malignant hyperthermie-syndrome was determined in 229 male DL-castrates of the progeny testing on the test stations Grub and Schwarzenau. Between the three possible MHS-genotypes NN (pure stress-resistant), NP (mixed stress-resistant) and PP (pure stress susceptible) the former two showed lesser differences of the preformance traits than to the latter. Concerning the NN-animals the following differences could be verified in comparison to the NP- and PP- castrates: 1.)a lower daily gain (26-34 gr) 2.)higher fat-thickness measurements (0.1-0.5 cm with a increased fat surface (0.9-2.5 cm2) 3.)a reduction in thickness (0.2-0.6 cm) and surface (1.5-5.6) of the loin 4.)a lower lean meat (0.8-2.7 percent) and ham yield (0.7-1.0 percent) 5.)a lower quantity of the belly (0.3-1.4 points) 6.)better meat quality traits (pH-values 0.08-0.79 and meat brightness 2.5-12.3) According to the improvement of the meat quality not anyone of the NN-animals showed the PSE-deficiency, but 46.2 percent of the PP-genotypes developed this meat quality. 90 animals could be examined of stress-disposition by the CK-test. Only all of the PP-genotypes showed levels in the stress-susceptible range of less than or just equal 3.0. The selection of homozygous stress-resistant animals in a population leads to a conversion of the type of animals, however, there must not be expected a severe reduction in the performance traits of economical interest.
Deskriptorji		SWINE MALIGNANT HYPERTHERMIA FATS MEAT CASTRATION VARIATION (GENETICS)