caa a22 4500 386320616 CHVBK 20180307111625.0 cr unu---uuuuu 161130e198802 xx s 000 0 eng 10.1017/S0003356100003159 doi S0003356100003159 pii (NATIONALLICENCE)cambridge-10.1017/S0003356100003159 Frequency of the halothane gene in british landrace and large white pigs [Elektronische Daten] The gene frequency of the halothane gene was estimated in nine British Landrace and Large White nucleus herds. Two hundred and sixty British Landrace and 186 Large White pigs purchased from these herd, to be used as foundation stock for a joint experiment on lean growth at the Physiology and Genetics Research Station, Edinburgh at Wye College, were test mated to homozygous halothane reactors (nn). One thousand six hundred and forty-six British Landrace and 1764 Large White offspring were given a 4-min halothane test at average ages of 76 and 50 days respectively. Maximum-likelihood estimates of the halothane gene frequency were 0·33 (s.e. 0·03) in British Landrace and 0·11 (s.e. 0·02) in Large White. Estimated proportions of reactors amongst heterozygotes (Nn) and halothane homozygotes (nn) were 0·00 and 0·70 in Large White, and 0·02 and 0·85 in British Landrace. There was significant heterogeneity between the herds for both breeds (P < 0·05). The proportion of halothane reactors in British Landrace herds has increased significantly (P < 0·05) from 0·13 in 1979 to 0·18 in 1982, and the proportion of Large White reactors has increased from zero to 0·01 in the same time period. Copyright © British Society of Animal Science 1988 Southwood O. I. AFRC Institute of Animal Physiology and Genetics Research, Edinburgh Research Station, West Mains Road, Edinburgh EH9 3JQ Simpson S. P. AFRC Institute of Animal Physiology and Genetics Research, Edinburgh Research Station, West Mains Road, Edinburgh EH9 3JQ Curran M. K. Wye College, University of London, Nr Ashford, Kent TN25 5AH Webb A. J. AFRC Institute of Animal Physiology and Genetics Research, Edinburgh Research Station, West Mains Road, Edinburgh EH9 3JQ Animal Production Cambridge University Press 46/1(1988-02), 97-102 0003-3561 46:1<97 1988 46 ASC https://doi.org/10.1017/S0003356100003159 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0003356100003159 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Southwood O. I. AFRC Institute of Animal Physiology and Genetics Research, Edinburgh Research Station, West Mains Road, Edinburgh EH9 3JQ NATIONALLICENCE 700 1- Simpson S. P. AFRC Institute of Animal Physiology and Genetics Research, Edinburgh Research Station, West Mains Road, Edinburgh EH9 3JQ NATIONALLICENCE 700 1- Curran M. K. Wye College, University of London, Nr Ashford, Kent TN25 5AH NATIONALLICENCE 700 1- Webb A. J. AFRC Institute of Animal Physiology and Genetics Research, Edinburgh Research Station, West Mains Road, Edinburgh EH9 3JQ NATIONALLICENCE 773 0- Animal Production Cambridge University Press 46/1(1988-02), 97-102 0003-3561 46:1<97 1988 46 ASC CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge