Contents
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Introduction Review of Literature Body Weights Body weight of pure breed Body weight of some crosses Correlation estimates for body weights at different ages Heritability estimates for body weight Sexual Maturity Traits Age and body weight at sexual maturity Body measurements at sexual maturity Egg Production Traits Egg weight and number Correlation estimates for sexual maturity and egg production traits Heritability estimates for sexual maturity and egg production traits Materials and Methods Experiment 1 Experiment 2 Management Measurement of the Study Traits Methods of Statistical Analysis
Results and Discussion Experiment 1 Body Weight Growth rate Heterosis of body weight Sexual Maturity and Egg Production Age at Sexual Maturity Body Weight at Sexual Maturity Shank Length Keel Length Comb Hight Comb Length Wattle length 90 and 120-day Egg Number 90 and 120-day Egg Wight 90 and 120-day Egg mass Heterosis Estimates for Egg Production and Sexual Maturity traits Heritability Estimates for Body Weight Correlation Estimates between Body Weights Heritability Estimates for Egg Production and Sexual Maturity Correlation Estimates among Egg Production and Sexual Maturity
Experiment 2 Body Weight Growth rate Heterosis of body weight Sexual Maturity and Egg Production Age at Sexual Maturity Body Weight at Sexual Maturity Shank and keel Lengths Comb Hight and Length Wattle length 90 and 120-day Egg Number 90 and 120-day Egg Wight 90 and 120-day Egg mass Heterosis Estimates for Egg Production and Sexual Maturity traits Correlation Estimates Correlation Estimates between Body Weights Correlation Estimates among Egg Production and Sexual Maturity Heritability Estimates Heritability Estimates for Body Weight Heritability Estimates for Egg Production and Sexual Maturity Summary and conclusion References |
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27 28 28 29 31
39 39 43 47
51 51 51 54 54 54 55 55 57 57 58 61 61 63 63
65 69 73
78 78 81 81 82 82 82 84 84
87 87
90 90 92 97
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