Research Note: Muscle hypertrophy is associated with reversed sexual dimorphism in body size of quail
ABSTRACT: Sexual dimorphism is phenotypic differences between males and females in the same species. In general, males in most animals are larger than females at the same age, however, in quail, females have a larger body size with greater muscle mass than males. To understand what characteristics i...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-01-01
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| Series: | Poultry Science |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0032579123007824 |
| _version_ | 1797366684986638336 |
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| author | Dong-Hwan Kim Joonbum Lee Boin Lee Kichoon Lee |
| author_facet | Dong-Hwan Kim Joonbum Lee Boin Lee Kichoon Lee |
| author_sort | Dong-Hwan Kim |
| collection | DOAJ |
| description | ABSTRACT: Sexual dimorphism is phenotypic differences between males and females in the same species. In general, males in most animals are larger than females at the same age, however, in quail, females have a larger body size with greater muscle mass than males. To understand what characteristics in muscle growth play roles in reversed sexual dimorphism in quail, the weights and the characteristics of the pectoralis major and gastrocnemius muscles (PM and GM, respectively) of male and female quail were compared in the current study. The data showed that 15-wk-old female quail have significantly heavier bodies, and PM and GM weights compared to male quail (1.27-folds, 1.29-folds, and 1.16-folds, respectively). To compare muscle characteristics such as hypertrophy (increased size) and hyperplasia (increased cell number), the PM and GM were stained using hematoxylin and eosin, and then histological characteristics such as total cross-sectional area (CSA), number and size of myofibers, and muscle bundle of the muscles were measured and analyzed. In both PM and GM, there were no differences in total numbers of myofibers and muscle bundles as well as the average numbers of myofibers per bundle between sexes. However, the sizes of myofiber and the bundle were significantly increased in female compared to male (1.33-folds and 1.28-folds in PM, and both 1.23-folds in GM, respectively). The findings of the current study suggest that muscle hypertrophy in female quail, not hyperplasia, can be attributed to the sexual dimorphism in quail size. |
| first_indexed | 2024-03-08T17:07:58Z |
| format | Article |
| id | doaj.art-be4a71c86400482c94e09d459b0ac95c |
| institution | Directory Open Access Journal |
| issn | 0032-5791 |
| language | English |
| last_indexed | 2024-03-08T17:07:58Z |
| publishDate | 2024-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Poultry Science |
| spelling | doaj.art-be4a71c86400482c94e09d459b0ac95c2024-01-04T04:35:47ZengElsevierPoultry Science0032-57912024-01-011031103263Research Note: Muscle hypertrophy is associated with reversed sexual dimorphism in body size of quailDong-Hwan Kim0Joonbum Lee1Boin Lee2Kichoon Lee3Department of Animal Sciences, The Ohio State University, Columbus, OH 43210, USADepartment of Animal Sciences, The Ohio State University, Columbus, OH 43210, USADepartment of Animal Sciences, The Ohio State University, Columbus, OH 43210, USA; Department of Animal Sciences and Biotechnology, Kyungpook National University, Sangju 37224, South KoreaDepartment of Animal Sciences, The Ohio State University, Columbus, OH 43210, USA; Corresponding author:ABSTRACT: Sexual dimorphism is phenotypic differences between males and females in the same species. In general, males in most animals are larger than females at the same age, however, in quail, females have a larger body size with greater muscle mass than males. To understand what characteristics in muscle growth play roles in reversed sexual dimorphism in quail, the weights and the characteristics of the pectoralis major and gastrocnemius muscles (PM and GM, respectively) of male and female quail were compared in the current study. The data showed that 15-wk-old female quail have significantly heavier bodies, and PM and GM weights compared to male quail (1.27-folds, 1.29-folds, and 1.16-folds, respectively). To compare muscle characteristics such as hypertrophy (increased size) and hyperplasia (increased cell number), the PM and GM were stained using hematoxylin and eosin, and then histological characteristics such as total cross-sectional area (CSA), number and size of myofibers, and muscle bundle of the muscles were measured and analyzed. In both PM and GM, there were no differences in total numbers of myofibers and muscle bundles as well as the average numbers of myofibers per bundle between sexes. However, the sizes of myofiber and the bundle were significantly increased in female compared to male (1.33-folds and 1.28-folds in PM, and both 1.23-folds in GM, respectively). The findings of the current study suggest that muscle hypertrophy in female quail, not hyperplasia, can be attributed to the sexual dimorphism in quail size.http://www.sciencedirect.com/science/article/pii/S0032579123007824sexual dimorphismhypertrophymyofibermuscle bundlequail |
| spellingShingle | Dong-Hwan Kim Joonbum Lee Boin Lee Kichoon Lee Research Note: Muscle hypertrophy is associated with reversed sexual dimorphism in body size of quail Poultry Science sexual dimorphism hypertrophy myofiber muscle bundle quail |
| title | Research Note: Muscle hypertrophy is associated with reversed sexual dimorphism in body size of quail |
| title_full | Research Note: Muscle hypertrophy is associated with reversed sexual dimorphism in body size of quail |
| title_fullStr | Research Note: Muscle hypertrophy is associated with reversed sexual dimorphism in body size of quail |
| title_full_unstemmed | Research Note: Muscle hypertrophy is associated with reversed sexual dimorphism in body size of quail |
| title_short | Research Note: Muscle hypertrophy is associated with reversed sexual dimorphism in body size of quail |
| title_sort | research note muscle hypertrophy is associated with reversed sexual dimorphism in body size of quail |
| topic | sexual dimorphism hypertrophy myofiber muscle bundle quail |
| url | http://www.sciencedirect.com/science/article/pii/S0032579123007824 |
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