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Evaluation of the effects of selection for increased body weight and increased yield on growth and development of poultry

Reddish, John Mark
http://rave.ohiolink.edu/etdc/view?acc_num=osu1073054170

Abstract Details

2004, Doctor of Philosophy, Ohio State University, Animal Science.
The objective of the research contained herein was to evaluate the effects of selection for increased body weight and increased yield on the growth and development of maternal lines of poultry. The initial experiment assessed the effect of selection for growth on the onset of reproduction in body weight-selected (HW) and randombred (R1) Japanese quail hens. Quail from the same families within lines were compared in two consecutive hatches. The relationships between the onset of reproduction and reproductive and carcass traits in HW quail hens were less clear than in R1 quail hens. The second experiment was designed to determine the effect of selection for increased breast muscle weight in Japanese quail hens on reproductive traits. Hens were selected based on pectoralis major weight and body weight (BW) as a covariate, while male genetics remained constant with use of randombred males. After six generations, the maternal selection scheme for pectoralis major breast muscle in Japanese quail hens did increase the weight of the pectoralis major muscle and was of moderate heritability; however, reproductive performance did not decline. The third and fourth experiments compared lines of commercial broilers and broiler breeder pullets exhibiting phenotypic differences in breast muscle yield and similar body weights. The broiler research evaluated broiler males exhibiting similar rates of BW gain based on a percentage of 8-wk BW. The broiler breeder pullet research investigated selection effects on carcass and reproductive characteristics. This information suggests these lines may prove a useful genetic model for comparisons with commercial lines exhibiting significant differences in carcass development traits. In the fifth experiment, the temporal expression of the fast myosin heavy chain (MyHC) isoforms was characterized in diverse genotypes of commercial broilers. The results were that selection for growth and carcass development in broilers is accompanied by changes in the temporal expression of the chicken fast MyHC isoforms. The final experiment conducted evaluated the effect of dietary lysine on breast muscle growth within two maternal commercial broiler lines exhibiting differences in breast yield. The results suggest that commercial broilers exhibiting extremes in breast yield have increased total and digestible lysine requirements.
Michael Lilburn (Advisor)
111 p.
selection; growth and development; poultry; Japanese quail; myosin

Recommended Citations

Citations

  • Reddish, J. M. (2004). Evaluation of the effects of selection for increased body weight and increased yield on growth and development of poultry [Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1073054170

    APA Style (7th edition)

  • Reddish, John. Evaluation of the effects of selection for increased body weight and increased yield on growth and development of poultry. 2004. Ohio State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1073054170.

    MLA Style (8th edition)

  • Reddish, John. "Evaluation of the effects of selection for increased body weight and increased yield on growth and development of poultry." Doctoral dissertation, Ohio State University, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=osu1073054170

    Chicago Manual of Style (17th edition)

osu1073054170
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© 2004, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.