COMPARISON OF MILK PRODUCTION OF THE PROGENY OF BLAD-CARRIER AND HEALTHY HOLSTEIN BULLS IN HUNGARY

Author:

Jánosa Ágnes1,Dohy J.2,Baranyai B.3

Affiliation:

1. 1 University of Agricultural Sciences Faculty of Agriculture Please ask the editor of the journal.

2. 2 Agricultural Research Centre of Finland, MTT Please ask the editor of the journal.

3. 3 Agricultural Biotechnology Centre H-2100 Gödöllő, Hungary

Abstract

'Bovine Leukocyte Adhesion Deficiency' (BLAD) is a recessive monofactorial, lethal inheritable defect occurring in Holstein-Friesian cattle and often passed on by well-known top bulls. The aim of this study was to find a relationship between the BLAD genotype of bulls, their genetic evaluation for milk and their daughters' milk production. BLAD-carrier and healthy bulls were compared on the basis of their breeding value published in November 1997. The first 100 bulls ranked according to the Total Production Index (TPI) were used, including nine BLAD carriers with 2,835 daughters and 77 healthy sires with 21,950 female progenies. For 14 bulls the BLAD genotype was not indicated. The healthy animals significantly outperformed the BLAD carriers, which result contradicts our earlier findings (Dohy et al., 1996; Jánosa and Dohy, 1997). In a BLAD elimination programme, the identification of BLAD carriers and properly planned mating are of great importance in order to avoid'inter se'mating of BLAD-carrier top animals which can be of significant influence in Holstein breeding.

Publisher

Akademiai Kiado Zrt.

Subject

General Veterinary

Reference17 articles.

1. Clinical symptomatology of bovine adhesion deficiency (BLAD) (in Hungarian, with English abstract).;M. Stöber;Magyar Állatorvosok Lapja,1996

2. Simultaneous analysis of bovine k-casein and BLAD alleles by multiplex PCR followed by parallel digestion with two restriction enzymes.;A. Zsolnai;Anim. Genet.,1996

3. Detection of bovine leukocyte adhesion deficiency by nonisotopic ligase chain reaction.;C. Batt;Anim. Genet.,1994

4. Bognár, L. (1997): Performance of Holstein sires in Hungary (in Hungarian). Publication of the National Association of Hungarian Holstein-Friesian Breeders, 1997.

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