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Table 4 Comparative positions of quantitative trait loci (QTL) for body weight, growth rates and growth curve parameters

From: Comparative analysis of quantitative trait loci for body weight, growth rate and growth curve parameters from 3 to 72 weeks of age in female chickens of a broiler–layer cross

No1 Age specific weight and growth rate ln Gompertz parameter
  3wk 6wk 12wk 24wk 48wk 72wk WA Ti K L Wo
    Gr3-6 Gr6-12 Gr12-24 Gr24-48 Gr48-72      
1 131 505 130 508 137 525 131 560        541  
    130    578      365      
2   298 148 286   281   276   286   283 32    
     282        365      
3    47 235 39     40 216 45 46, 205     
    49 237 13     2 221       
4   148 0 161 0 177   142   153 183 166 22 17 144  
    0 163   168     183 12      
6 30   8   30     9        
    11              
7             46   93   
            92      
8 63   67   61   14 87 24   12 13     78
        15          
9      90     81    46     
      97            
11 0    0          7    
     0             
Z 127    119   117   127         
M2 13   13   13   13 27 15 27 27, 28 15, 27   28   13
    13   27      28       
  1. 1Macrochromosome number.
  2. 2Microchromosome number only is presented in the rows of the table (see Additional file 3: Table S3)
  3. WA = asymptotic (estimated mature) body weight, i.eWo*exp (L/K), g.
  4. Ti = age at point of inflection, where Ti = (1/K)log(L/K), d.
  5. K = rate of exponential decay, g/d.
  6. L = growth rate per day at day zero, g/d.
  7. W0 = hatching weight, (y –intercept), g.
  8. The position (cM) of QTL for weight at a specific age (normal font), growth between successive ages (italic font) and Gompertz curve parameter estimates (normal font) are itemised. Genome significant (P < 0.05) QTL are in bold font; suggestive (chromosome significant) QTL are in regular font.
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