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Characterization of Increased Muscle Growth in a Heavy Weight Line of Japanese Quail

Donley, Sarah
http://rave.ohiolink.edu/etdc/view?acc_num=osu1316455908

Abstract Details

2011, Master of Science, Ohio State University, Animal Sciences.
The poultry industry is of great economic importance in the United States. Increasing the muscle yield of poultry is of great interest to the poultry industry, but the mechanisms that control muscle growth and development are not fully understood. Broiler-type chickens and turkey have been shown to have increased muscle yield, especially pectoral muscle (breast muscle), and this increased muscularity has been shown to be due to increased muscle fiber number (hyperplasia) and/or increased muscle fiber size (hypertrophy). Some lines of quail have been shown to have similarly increased pectoral muscle size, and to exhibit hypertrophy or hyperplasia. However, the heavy weight (HW) line of quail has not been characterized, and is of particular interest as previous studies indicate a possible increase in pectoral muscle size relative to body weight compared to a control line. Embryonic and posthatch growth curves are reported here for the HW line as well as a control line (RBC). HW quail show an initially smaller size, but quickly surpass RBC line quail during embryonic growth. At hatch, HW quail are significantly larger than RBC, and continue to grow more quickly than RBC quail, to a 2.3 fold increase compared to RBC at 85 days posthatch. The HW line also shows an increased right pectoralis major (r. p. major) size and weight compared to the RBC line from posthatch day 4, and is a greater percentage of body weight by day 8 posthatch. By day 85 posthatch, the HW r. p. major is 2.7 times larger than that of the RBC. The HW r. p. major has more DNA than the RBC from the day of hatch, indicating the presence of more nuclei, and probably a greater cell number. At day 15 posthatch, the HW r. p. major has 1.6 fold more fibers than the RBC r. p. major, and the mean fiber cross-sectional area is 3.6 fold larger. By day 85, the RBC fiber cross-sectional area is 471.45μm2 and the HW is 839.22μm2. No significant differences were seen in satellite cell proliferation rates at day 6 or 15 posthatch, although the HW line has a greater number of cells at day 6 posthatch. Further study would be required to determine whether satellite cell proliferation differences are a factor in the muscle growth differences seen in HW and RBC quail in earlier or later development. The increased size of HW muscle is due both to hypertrophy and hyperplasia.
Kichoon Lee, PhD (Advisor)
Macdonald Wick, PhD (Other)
David Latshaw, PhD (Other)
Animal Sciences
hypertrophy; hyperplasia; quail; myogenesis

Recommended Citations

Citations

  • Donley, S. (2011). Characterization of Increased Muscle Growth in a Heavy Weight Line of Japanese Quail [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1316455908

    APA Style (7th edition)

  • Donley, Sarah. Characterization of Increased Muscle Growth in a Heavy Weight Line of Japanese Quail. 2011. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1316455908.

    MLA Style (8th edition)

  • Donley, Sarah. "Characterization of Increased Muscle Growth in a Heavy Weight Line of Japanese Quail." Master's thesis, Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1316455908

    Chicago Manual of Style (17th edition)

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© 2011, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.