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博碩士論文: 客家雞隻的生長與產蛋性能之探討=A Study on the Growth and Laying Performance of Hakka Chicken

  • 作者:娜素達(Nutsuda Srigrod)(研究生)
  • 其他作者:李淵百(Yen-Pai Lee)(指導教授)
  • 語文:英文
  • 出版者:中興大學
  • 系所名稱:動物科學系所
  • 學位類別:碩士
  • 出版日期:2010
  • 畢業學年度:98
  • 頁數:59
    • 主題:客家圖書-作品單篇
    • 關鍵詞:客家雞、生長表現、產蛋表現、遺傳率、Hakka Chicken、Growth performance、Laying performace、Heritability
    • 國家:臺灣

    摘要:

    In domestic poultry, a strong negative relationship exists between body weight and reproductive effectiveness. In Taiwan, Hakka people like large chicken lead to Hakka chickens were selected for large body size which decreases the reproduction performance of breeding stock. The purpose of this experiment was the study of growth and laying performance of Hakka chicken (synthetic line). This study used 499 and 361 birds in generation one and two (G1 and G2). Their records include live body weight from hatch to 32 wks of age (every 4 wks), egg weight (at first egg and 35 wks) and individual egg production from age at first egg to 40 weeks of age. Growth parameters, heritabilities, genetic correlation between traits and phenotypic and genetic trends were estimated. The results found ranges of body weight at 32 weeks of age were 3-4 kg and 2-3 kg for males and females respectively. Growth parameters, the first one is age at inflection (TI) of Generation 1 were 67 and 60 days, generation2 were 63 and 69 days for male and female respectively, asymptotic body weights at an infinite (A) of generation 1 were 4964 g, 2966 g, generation 2 were 4858 g and 3093 g for male and female respectively. Egg production to 40 weeks of age in generation two (egg number = 82.7 eggs) was higher than generation one (egg number = 63.3 eggs). Heritabilities were high in body weight and growth parameter (most over 0.5 except for body weight at 4 weeks = 0.01 because chicken in Generation 1 got coccidiosis and growth rate = 0.03 because maternal effect), middle heritability founded in egg weight (0.14-0.16) and low to middle in egg production (0.04-0.25). High mortality rate was found in both generations. Genetic trends of egg productions were increase trends in Generation 2 but selected egg number occurred only one generation. Generation 1 got disease, hot wave and typhoon during experiment. In conclusion Hakka chickens (synthetic line) increased body size and egg production just by one generation of selection. However, the rapid increase of egg production might be affected by environmental variation as indicated by a low estimated heritability. Furthermore, two disadvantages need to overcome are the high mortality rate and the low egg production due to heavy body weights.

    目錄:

    TABLE OF CONTENTS
    CONTENTS
    ABSTRACT....................................i
    TABLE OF CONTENTS....................................iii
    LIST OF TABLES....................................v
    LIST OF PICTURES....................................vi
    1. Introduction....................................1
    2. The Review and Literature..............................2
    2.1. Heritability and genetic selection....................................2
    2.1.1 Heritability of growth and laying performance....................................4
    2.2. Estimated of genetic parameters....................................7
    2.3. Selection traits in this study....................................10
    2.3.1. Growth feathering....................................10
    2.3.2. Shank color 11
    2.4. Commercial breeding program....................................11
    2.5. Growth performance....................................13
    2.5.1. Growth curves....................................14
    2.6. Laying performance....................................15
    2.6.1. Environments interaction of female broiler breeders....................................16
    2.7. Native chicken in Taiwan....................................18
    2.7.1. Hakka chicken....................................18
    2.7.2. History of NCHU L2 strain in Taiwan....................................19
    3. Materials and Methods....................................21
    3.1 Animal population....................................21
    3.1.1. Hakka chickens....................................21
    3.1.2. Parent (Generation 1, G1)....................................25
    3.1.3. Offspring (Generation 2, G2)....................................26
    3.2. Feeding and housing management....................................30
    3.3. Traits measured....................................33
    3.3.1. Growth performance....................................33
    3.3.2. Laying performance....................................33
    3.4. Statistical analysis....................................34
    3.4.1. The growth curve....................................34
    3.4.2 Statistical analyses of all phenotypic traits....................................34
    3.4.3 Estimation of genetic variance and covariance components....................................34
    3.4.4. Genetic trends....................................35
    4. Results and Discussion....................................36
    4.1. Mortality of laying hens....................................36
    4.2. Growth performance....................................37
    4.2.1. Body weights....................................37
    4.2.2. Growth curve and parameters....................................38
    4.2.3. Genetic of body weights and growth parameters....................................42
    4.3. Laying performance....................................44
    4.3.1. Phenotype of laying performance....................................44
    4.3.2. Genetic of laying performance....................................46
    4.4. Phenotypic and genetic trends of laying performance....................................48
    5. Conclusion....................................51
    6. References....................................52