scholarly journals Animal Breeding Research Department, University of Edinburgh

Nature ◽  
1927 ◽  
Vol 119 (2996) ◽  
pp. 510-510
Author(s):  
E. W. M.
Keyword(s):  
Animal Breeding ◽  
Research Department ◽  
Breeding Research ◽  
University Of Edinburgh

Breeding

1929 ◽  
Vol 2 (1) ◽  
pp. 21-25
Keyword(s):  
Special Reference ◽  
Annual Report ◽  
Economic Importance ◽  
Animal Breeding ◽  
Research Department ◽  
Breeding Research ◽  
The University

Animal Breeding Research Department. The University, Edinburgh. Seventh Annual Report of the Director for the year April 1st 1926 to March 31st 1927.The function of the department.To secure and democratise knowledge concerning the physiology of reproduction and of inheritance with special reference to the animals of economic importance.

Phenotypic and genetic parameters for lamb weights in a synthetic line of sheep

1980 ◽  
Vol 30 (2) ◽  
pp. 261-269 ◽  
Author(s):  
T. G. Martin ◽  
D. I. Sales ◽  
C. Smith ◽  
D. Nicholson
Keyword(s):  
Least Squares ◽  
Genetic Parameters ◽  
Genetic Correlations ◽  
Animal Breeding ◽  
Research Organization ◽  
Correction Factors ◽  
Component Method ◽  
Breeding Research ◽  
Selection For ◽  
Synthetic Line

ABSTRACTData on 2120 lambs produced over 7 years in the Animal Breeding Research Organization synthetic Dam Line (49% Finn, 22% East Friesian, 16 % Border Leicester and 13 % Dorset Horn) were analysed by least squares. The effects of sex, age of dam, year of birth, birthrearing class, and age of lamb on weights at birth and at 4, 8, 12 and 16 weeks of age were all appreciable. However, pooled within-year correction factors should be adequate in adjusting records for selection. Heritability estimates for weights at the five ages ranged from 0·17 to 0·24 by the sire component method and from 0·18 to 0·28 by regression of offspring on dam. Previous reports of differences in heritability in singles and in twins were not confirmed. Estimates of the genetic correlations among the various lamb weights were high (0·62 to 1·04) indicating that selection for weight at one age should result in increased weights at all ages.

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.

Improvement of biological efficiency, Animal breeding: contributions to the efficiency of livestock production

1973 ◽  
Vol 267 (882) ◽  
pp. 131-144 ◽  
Keyword(s):  
Food Production ◽  
Livestock Production ◽  
Reproductive Rate ◽  
Animal Breeding ◽  
Scientific Study ◽  
Biological Efficiency ◽  
Factory Farming ◽  
Production Methods ◽  
Breeding Research ◽  
Hill Farming

Biological efficiency is an elastic term that commonly refers to comparisons of some aspect of animal performance at individual or herd level. It is useful in reviewing the opportunities for improvement by animal breeding to stretch the term to cover the biological efficiency of whole industries and thus their ability to compete for resources. Past improvements in the productivity of livestock, especially of pigs and poultry, suggests that genetical progress tends to be contemporary with advances in husbandry, scale, and other aspects of management; that ruminants are relatively backward; and that reproductive rate has so far not contributed fully to the improvements. The conflict of objectives that follows from diversity in production methods that range from hill-farming to factory farming needs resolving. Most of the prospective contributions from animal breeding research imply an emphasis on intensive systems and on efficient food production. Since society at large has other interests as well, there is a case for initiating an articulate and scientific study of the facts, methods and principles of livestock policy with a view to identifying national priorities.

GENETIC VARIATION IN THE SECRETION OF OESTROGEN IN THE EWE

1977 ◽  
Vol 75 (2) ◽  
pp. 337-338 ◽  
Author(s):  
A. G. WHEELER ◽  
D. T. BAIRD ◽  
R. B. LAND ◽  
R. J. SCARAMUZZI
Keyword(s):  
Genetic Variation ◽  
Reproductive Biology ◽  
Positive Feedback ◽  
Feedback Effects ◽  
Peripheral Plasma ◽  
Obstetrics And Gynaecology ◽  
Research Organisation ◽  
Breeding Research ◽  
University Of Edinburgh ◽  
Venous Plasma

A.R.C. Animal Breeding Research Organisation, The King's Buildings, West Mains Road, Edinburgh, EH9 3JQ and †M.R.C. Unit of Reproductive Biology, Department of Obstetrics and Gynaecology, University of Edinburgh, Edinburgh, EHI 2QW (Received 12 May 1977) It has been suggested that the sensitivity of ewes to the negative and positive feedback effects of oestrogen can be related to the rate of ovulation of the breed (Land, 1976; Land, Wheeler & Carr, 1976), and may be associated with different patterns of oestrogen secretion as inferred by Land, Thompson & Baird (1972). However, no apparent differences between the concentrations of oestrogens in jugular venous plasma from ewes with differing rates of ovulation have been reported (Bindon, Blanc, Pelletier, Terqui & Thimonier, 1975; Scaramuzzi & Land, 1976). The pulsatile nature of the ovarian secretion of oestradiol (Baird, Swanston & Scaramuzzi, 1976) and the fact that the concentrations of oestrogen in peripheral plasma are so

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