Genomic and phenotypic selection indices for decreased birth weight, shortening fattening period, and regulating total weight gain in beef cattle
Objective This study aimed to develop genomic and phenotypic indices for beef cattle selection that afford progeny with reduced birth weight and fattening period. The indices should also allow regulating total weight gain during the fattening period and avoid marked increases of inbreeding. Methods...
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| Format: | Article |
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Asian-Australasian Association of Animal Production Societies
2025-02-01
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| Series: | Animal Bioscience |
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| Online Access: | http://www.animbiosci.org/upload/pdf/ab-24-0171.pdf |
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| author | Kenji Togashi Atsushi Ogino Toshio Watanabe Masakazu Shinomiya Masashi Kinukawa Kazuhito Kurogi Masanobu Nurimoto |
| author_facet | Kenji Togashi Atsushi Ogino Toshio Watanabe Masakazu Shinomiya Masashi Kinukawa Kazuhito Kurogi Masanobu Nurimoto |
| author_sort | Kenji Togashi |
| collection | DOAJ |
| description | Objective This study aimed to develop genomic and phenotypic indices for beef cattle selection that afford progeny with reduced birth weight and fattening period. The indices should also allow regulating total weight gain during the fattening period and avoid marked increases of inbreeding. Methods Whether addition of constraint on total weight gain to constraints on body weight gain at up to four specific time points during the fattening process was effective for the weight gain until the end of the fattening period was examined in two selection indices with the selection trait being a phenotypic or a genomic breeding value random regression coefficient. Results Both indices afforded cattle with desired weight gains at specific time points and desired total weight gains. One cycle of index-based selection made it possible to shorten the fattening period two weeks compared with that before selection while maintaining the same final fattening weight as before selection. The impact of constraining total weight gain was smallest when the number of weight gain constraints at specific time points was three or four. However, constraining total weight gain was necessary to avoid poor total weight gain when the number of weight gain constraints at specific time points was only one or two. Conclusion The developed indices make it possible to regulate total weight gain during the fattening process and to achieve desired weight gains at specific time points. Importantly, the indices bring about genetic improvement without an excessive increase of inbreeding. Thus, we expect that these indices will contribute to sustainable genetic improvement in cattle while maintaining genetic diversity. |
| format | Article |
| id | doaj-art-047f8ed3d3734700856f21fbd42b4825 |
| institution | Kabale University |
| issn | 2765-0189 2765-0235 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Asian-Australasian Association of Animal Production Societies |
| record_format | Article |
| series | Animal Bioscience |
| spelling | doaj-art-047f8ed3d3734700856f21fbd42b48252025-01-03T04:14:22ZengAsian-Australasian Association of Animal Production SocietiesAnimal Bioscience2765-01892765-02352025-02-0138222323510.5713/ab.24.017125310Genomic and phenotypic selection indices for decreased birth weight, shortening fattening period, and regulating total weight gain in beef cattleKenji Togashi0Atsushi Ogino1Toshio Watanabe2Masakazu Shinomiya3Masashi Kinukawa4Kazuhito Kurogi5Masanobu Nurimoto6 Livestock Improvement Association of Japan, Maebashi, Gunma, 371-0121, (Retired)Japan Livestock Improvement Association of Japan, Maebashi, Gunma, 371-0121, Japan Livestock Improvement Association of Japan, Maebashi, Gunma, 371-0121, Japan Livestock Improvement Association of Japan, Koto-ku, Tokyo, 135-0041, Japan Livestock Improvement Association of Japan, Maebashi, Gunma, 371-0121, Japan Livestock Improvement Association of Japan, Koto-ku, Tokyo, 135-0041, Japan Livestock Improvement Association of Japan, Maebashi, Gunma, 371-0121, JapanObjective This study aimed to develop genomic and phenotypic indices for beef cattle selection that afford progeny with reduced birth weight and fattening period. The indices should also allow regulating total weight gain during the fattening period and avoid marked increases of inbreeding. Methods Whether addition of constraint on total weight gain to constraints on body weight gain at up to four specific time points during the fattening process was effective for the weight gain until the end of the fattening period was examined in two selection indices with the selection trait being a phenotypic or a genomic breeding value random regression coefficient. Results Both indices afforded cattle with desired weight gains at specific time points and desired total weight gains. One cycle of index-based selection made it possible to shorten the fattening period two weeks compared with that before selection while maintaining the same final fattening weight as before selection. The impact of constraining total weight gain was smallest when the number of weight gain constraints at specific time points was three or four. However, constraining total weight gain was necessary to avoid poor total weight gain when the number of weight gain constraints at specific time points was only one or two. Conclusion The developed indices make it possible to regulate total weight gain during the fattening process and to achieve desired weight gains at specific time points. Importantly, the indices bring about genetic improvement without an excessive increase of inbreeding. Thus, we expect that these indices will contribute to sustainable genetic improvement in cattle while maintaining genetic diversity.http://www.animbiosci.org/upload/pdf/ab-24-0171.pdfbirth weightearly maturationgrowth curveinbreedingindexrandom regression |
| spellingShingle | Kenji Togashi Atsushi Ogino Toshio Watanabe Masakazu Shinomiya Masashi Kinukawa Kazuhito Kurogi Masanobu Nurimoto Genomic and phenotypic selection indices for decreased birth weight, shortening fattening period, and regulating total weight gain in beef cattle Animal Bioscience birth weight early maturation growth curve inbreeding index random regression |
| title | Genomic and phenotypic selection indices for decreased birth weight, shortening fattening period, and regulating total weight gain in beef cattle |
| title_full | Genomic and phenotypic selection indices for decreased birth weight, shortening fattening period, and regulating total weight gain in beef cattle |
| title_fullStr | Genomic and phenotypic selection indices for decreased birth weight, shortening fattening period, and regulating total weight gain in beef cattle |
| title_full_unstemmed | Genomic and phenotypic selection indices for decreased birth weight, shortening fattening period, and regulating total weight gain in beef cattle |
| title_short | Genomic and phenotypic selection indices for decreased birth weight, shortening fattening period, and regulating total weight gain in beef cattle |
| title_sort | genomic and phenotypic selection indices for decreased birth weight shortening fattening period and regulating total weight gain in beef cattle |
| topic | birth weight early maturation growth curve inbreeding index random regression |
| url | http://www.animbiosci.org/upload/pdf/ab-24-0171.pdf |
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