A Feeding Experiment with Twin Cattle

1953 ◽  
Vol 1953 (2) ◽  
pp. 76-85
Author(s):  
J. W. B. King
Keyword(s):  
Dairy Cattle ◽  
Animal Breeding ◽  
Cattle Population ◽  
Feeding Experiment ◽  
The West ◽  
Research Organisation ◽  
Breeding Research ◽  
West Midlands

Since 1948 the Animal Breeding Research Organisation has been collecting twin cattle in the West Midlands of England. The dairy cattle population here is dense—an important factor in reducing cost of collection. Propaganda was issued in various forms all directed at getting in touch with farmers owning one-egg twins, i.e. twins originating from the splitting of a single fertilised egg as distinct from two-egg twins coming from two fertilised eggs. As the twinning rate in cattle is only 1-2% of all births, and probably only about 1 in 20 of these twins are one-egg, their purchase and collection under British conditions is rather costly. Up to the end of 1952, 103 pairs of one-egg heifers twins had been collected.

Estimated halothane gene frequency in eight British pig breeding companies

1986 ◽  
Vol 1986 ◽  
pp. 25-25
Author(s):  
O.I. Southwood ◽  
M.K. Curran ◽  
S.P. Simpson ◽  
A.J. Webb
Keyword(s):  
Gene Frequency ◽  
Animal Breeding ◽  
Large White ◽  
Lean Growth ◽  
Research Organisation ◽  
Breeding Research ◽  
Foundation Stock ◽  
Joint Experiment ◽  
Wye College

Eight breeding companies contributed foundation stock for a joint experiment on lean growth at the Animal Breeding Research Organisation (ABRO) and Wye College. All animals were test-mated to halothane positive (HP) reactors and incidences of HP reaction among progeny were used to estimate the frequency of the halothane gene (n) in the original herds. Estimated incidences of HP were compared with those observed in an earlier 1979 survey.260 British Landrace (LR) were test-mated to HP (expected nn) LR at Wye, and 186 Large White (LW), including 18 boars standing at national AI centres, were test-mated to HP LR, Pietrain-Hampshire or LR x (LW x Norwegian Landrace) at ABRO.Offspring were given a 4-minute halothane test at an average age of 50 days in LW and 76 days in LR. Numbers tested and incidences of reaction are shown in Table 1. Herds are coded ‘A’ to ‘I’ for anonymity. Purebred LR in herds A, C, D, E, H and I were halothane testec in advance and only halothane negatives (HN) were supplied for test-mating.

Studies on the production of beef from zebu cattle in East Africa I. A description of the Muguga herd

1960 ◽  
Vol 55 (2) ◽  
pp. 229-231 ◽  
Author(s):  
G. H. Lampkin ◽  
K. Lampkin
Keyword(s):  
East Africa ◽  
Animal Breeding ◽  
Research Organization ◽  
Zebu Cattle ◽  
East African ◽  
Forestry Research ◽  
Veterinary Research ◽  
Research Organisation ◽  
Breeding Research ◽  
African Agriculture

1. The formation of a herd of Northern Frontier Zebus for genetical research has been described.2. Details are given of the system of mating used and the type of management adopted.Thanks are due to Dr J. W. B. King of the Animal Breeding Research Organization, Edinburgh, for his advice, to Mr M. A. Witcomb for taking the photographs, and to the Directors of the East African Veterinary Research Organization and the East African Agriculture and Forestry Research Organisation for their encouragement.

scholarly journals Development of animal breeding research.

1986 ◽  
Vol 34 (3) ◽  
pp. 421-426
Author(s):  
R.D. Politiek
Keyword(s):  
The Netherlands ◽  
Dairy Cattle ◽  
Genetic Improvement ◽  
Animal Breeding ◽  
Main Current ◽  
Breeding Research ◽  
Farm Livestock

This article outlines the scope of research on the genetic improvement of farm livestock in the Netherlands, and briefly describes the main current projects in the breeding of beef and dairy cattle. (Abstract retrieved from CAB Abstracts by CABI’s permission)

Comparison of crossbred ewes from five crossing sire breeds

1984 ◽  
Vol 39 (2) ◽  
pp. 241-249 ◽  
Author(s):  
T. J. L. Mann ◽  
C. Smith ◽  
J. W. B. King ◽  
D. Nicholson ◽  
D. I. Sales
Keyword(s):  
Animal Breeding ◽  
Production Traits ◽  
Research Organisation ◽  
Breeding Research

ABSTRACTA contemporary comparison of crossbred ewes from five crossing sire breeds was made on a research farm from 1976 to 1981. The breeds involved were the traditional Border Leicester, three imported breeds — the East Friesian, the Oldenburg and the Texel, and a new prolific composite breed — the Cambridge. Rams from these breeds were group mated (2 to 3 rams per breed per year) to Scottish Blackface ewes on an upland farm in Scotland. Crossbred ewes derived from these matings were compared over three lamb crops on a lowland farm in England. The ewes were run together with the same husbandry conditions for all types. Results were available on some 120 to 150 ewes (300 to 450 lambings) per crossbred type. The Oldenburg and Texel crossbred ewes were appreciably poorer in most aspects of lowland lamb production. The Cambridge crosses were prolific but had high lamb mortality and lower litter weights at weaning than the traditional Border Leicester crosses. The East Friesian crosses were appreciably superior in several production traits. These results were combined with those from three other trials, involving crosses from the Bluefaced Leicester and Animal Breeding Research Organisation Damline to provide a ranking for UK crossing sire breeds.

A note on a comparison of crossbreds from two prolific sheep breeds

1980 ◽  
Vol 31 (3) ◽  
pp. 323-325 ◽  
Author(s):  
T. G. Boaz ◽  
R. Jones ◽  
C. Smith
Keyword(s):  
Animal Breeding ◽  
Total Weight ◽  
Sheep Breeds ◽  
Research Organisation ◽  
Breeding Research

ABSTRACTTwo groups of crossbred ewes, produced by crossing the Scottish Blackface with two prolific sheep breeds, the East Friesian and the Animal Breeding Research Organisation Dam Line, were compared in good lowland conditions over three ages (2 to 4 years) from 1976 to 1978. The East Friesian crossbred ewes were heavier, had larger, heavier litters and had heavier lambs at weaning. More of their lambs were slaughtered directly off their dams, at heavier weights and at earlier ages. The total weight of lamb sold per ewe was about 15% higher than for the Dam Line crossbred ewes.

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