Summary
Sire and dam populations of meat-type chickens were developed at the Animal Research Centre, Ottawa to provide unselected control populations suitable for modern broiler research, estimate genetic parameters of broiler traits, and initiate selection experiments. The populations were synthesized from 16 commercial broiler parent stocks (nine sire and seven dam stocks) during two generations of crossbreeding and one generation of random mating. The estimated genetic contribution per stock to the respective population ranged from 8.3 to 16.7% for autosomal genes, from 5.5 to 17.8% for genes on Z chromosomes, and from 0 to 25.0% for genes on W chromosomes. Genetic differences among the original stocks had not been fully diffused among individuals within the populations at the time parameters were estimated. Consequently, genetic parameter estimates are probably slightly biased. Estimated heritabilities of broiler traits in these populations were generally high, 0.39 to 0.63. Hence, rapid genetic change of these traits is possible. The genetic correlation between 28 to 49 day feed efficiency and corresponding weight gain was 0.69 and between feed efficiency and abdominal fat percentage was -0.68. Increasing body weight gain, improving feed efficiency and reducing abdominal fatness of broilers by selection appears feasible.
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References
Becker WA, Spencer JV, Mirosh LW, Verstrate JA (1981) Abdominal and carcass fat in five broiler strains. Poult Sci 60:693–697
Chambers JR, Gavora JS, Fortin A (1981) Genetic changes in meat-type chickens in the last twenty years. Can J Anim Sci 61:555–563
Chambers JR, Fortin A, Grunder AA (1983) Relationships between carcass fatness and feed efficiency and its component traits in broiler chickens. Poult Sci 62:2201–2207
Clayton GA (1974) Turkey breeding. World's Poult Sci J 30:290–300
Dickerson G (1969) Experimental approaches in utilizing breed resources. Anim Breed Abstr 37:191–202
Friars GW, Lin CY, Patterson DL (1979) Strain-cross and sex interactions with systems of rearing broiler chickens. Can J Genet Cytol (Abstr) 21:562
Grunder AA, Lefkovitch LP, Chambers JR, Gavora JS (1983) Blood plasma and production traits in commercial broiler parent stocks. Can J Anim Sci 63:247–250
Leclercq B, Blum JC, Boyer JP (1980) Selecting broilers for low or high abdominal fat: initial observations. Br Poult Sci 21:107–113
Leeson S, Summers JD (1980) Production and carcass characteristics of the broiler chicken. Poult Sci 59:786–798
Merritt ES, Gowe RS (1962) Development and genetic properties of a control strain of meat-type fowl. In: Proc 12th World's Poult Congr, Sydney, Australia, pp 66–70
Moav R, Hill WG (1966) Specialized sire and dam lines. 4. Selection within lines. Anim Prod 8:375–390
Pym RAE, Nicholls PJ (1979) Selection for food conversion in broilers: direct and correlated responses to selection for body-weight gain, food consumption and food conversion ratio. Br Poult Sci 20:73–86
Pym RAE, Thompson JM (1980) A simple caliper technique for the estimation of abdominal fat in live broilers. Br Poult Sci 21:281–286
Ricard F-H (1974) Étude de la variabilité génétique de quelques caracteristiques de carcasses en cru de selectionner un poulet de qualité. 1er Congres mondial de génétique appliquée a l'élévage animal, Madrid, pp 931–940
Ricard F-H, Rouvier R (1967) Étude de la composition anatomique du poulet. 1. Variabilité de la répartition des differentes parties corporelles chez des coquelets Bresse-Pile. Ann Zootech 16:23–39
Ricard F-H, Rouvier R (1969) Étude de la composition anatomique du poulet. 3. Variabilité de la répartition des parties corporelles dans une souche de type Cornish. Ann Genet Sel Anim 1:151–165
Siegel PB (1962) Selection for body weight at eight weeks of age. 1. Short term response and heritabilities. Poult Sci 41:954–962
Smith C (1964) The use of specialized sire and dam lines in selection for meat production. Anim Prod 6:337–344
Thomas CH, Blow WL, Cockerham CC, Glazener EW (1958) The heritability of body weight, gain, feed consumption, and feed conversion in broilers. Poult Sci 37:862–869
Tzeng R, Becker WA (1981) Growth patterns of body and abdominal fat weights in male broiler chickens. Poult Sci 60:1101–1106
Wilson SP (1969) Genetic aspects of feed efficiency in broilers. Poult Sci 48:487–495
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Communicated by H. Abplanalp
Contribution No. 1203, Animal Research Centre
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Chambers, J.R., Bernon, D.E. & Gavora, J.S. Synthesis and parameters of new populations of meat-type chickens. Theoret. Appl. Genetics 69, 23–30 (1984). https://doi.org/10.1007/BF00262532
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DOI: https://doi.org/10.1007/BF00262532