Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(1), 55-58 | DOI: 10.11118/actaun200755010055
Vliv genotypů C-CSN a B-CSN na znaky mléčné užitkovosti českého strakatého plemene a holštýnského plemene
- Ústav morfologie, fyziologie a genetiky zvířat, Mendelova zemědělská a lesnická univerzita v Brně, Zemědělská 1, 613 00 Brno, Česká republika
Vliv genotypů χ-kaseinu a β-kaseinu na znaky mléčné užitkovosti (obsah tuku, proteinů a laktózy a dojivost) byl stanoven pro 807 a 488 jedinců českého strakatého plemene a pro 402 a 244 jedinců holštýnského plemene. Genotypy byly zjištěny pomocí metody PCR - RFLP, výsledky byly vizualizovány elektroforeticky na 3% agarózovém gelu. Asociační studie mezi zjištěnými polymorfismy a produkčními znaky byla provedena pomocí smíšeného lineárního modelu REML v programu SAS for Windows 9.3.1. Z našich výsledků vyplývá, že obsah proteinu v mléce je významně ovlivněn (P ≤ 0.01) genotypem v C-CSN lokusu (genotyp BB > AB > AA). Nebyl zjištěn vztah mezi lokusem C-CSN a obsahem tuku či laktózy. Nebyla detekována žádná asociace mezi genotypem v B-CSN lokusu a znaky mléčné užitkovosti.
χ-kasein, β-kasein, české strakaté, holštýnské plemeno
Effect of C-CSN and B-CSN genotypes on milk production traits in Czech Flekvieh and Holstein breed
The effect of the χ-casein (C-CSN) and β -casein (B-CSN) loci on the milk production traits (milk yield, fat, protein and lactose content) was estimated for 807 and 488 Czech Fleckvieh and 402 and 244 Holstein cows, respectively. Genotypes of C-CNS and B-CNS were determined by the use of PCR-RFLP method. The genotypes were detected by use of electrophoresis on agarose gel. The associations of studied polymorphisms with milk production traits were estimated using the mixed linear model procedure REML in SAS for Windows 9.1.3. Results indicated that protein content is significantly affected (P ≤ 0.01) by C-CSN genotype (genotype BB > AB > AA). Fat and lactose content were not affected by C-CSN locus. The B-CNS locus had no significant effect on any milk production traits.
Keywords: χ-casein, β-casein, Czech Fleckvieh, Holstein cows
Grants and funding:
This research was financially supported by the Czech Science Foundation project no. 523/03/H076 and project no. 1G58073 and QF3024 Thanks are offered to LAMGen company for technical assistance and samples providing for this work.
Received: January 16, 2007; Published: November 30, 2014 Show citation
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