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http://dx.doi.org/10.5713/ajas.2013.13036

Maternal Effects of Japanese Shorthorn Cows on the Growth of Embryo-transferred Japanese Black Calves in a Cow-calf Grazing System  

Yamaguchi, Manabu (Livestock and Forage Research Division, Tohoku Agricultural Research Center, National Agriculture and Food Research Organization (NARO))
Ikeda, Kentaro (Livestock and Forage Research Division, Tohoku Agricultural Research Center, National Agriculture and Food Research Organization (NARO))
Takenouchi, Naoki (Livestock and Forage Research Division, Tohoku Agricultural Research Center, National Agriculture and Food Research Organization (NARO))
Higashiyama, Masakazu (Livestock and Forage Research Division, Tohoku Agricultural Research Center, National Agriculture and Food Research Organization (NARO))
Watanabe, Akira (Livestock and Forage Research Division, Tohoku Agricultural Research Center, National Agriculture and Food Research Organization (NARO))
Publication Information
Asian-Australasian Journal of Animal Sciences / v.26, no.7, 2013 , pp. 930-934 More about this Journal
Abstract
The growth performance of embryo-transferred Japanese Black calves that were born from, and suckled by, Japanese Shorthorn cows in a cow-calf grazing system (BS-group, n = 5) was compared to that of Japanese Black calves from Japanese Black cows in a cowshed (BB-group, n = 5). The daily weight gain from birth to 1 month was higher in the BS-group than in the BB-group (p<0.01), and the same trend (p<0.05) was observed at 2 and 3 months of age. This resulted in body weight that was significantly higher for the BS-group between 1 and 3 months of age than what was observed for the BB-group (p<0.05). Heart girth was significantly greater in the BS-group than in the BB-group throughout the experimental period (p<0.01), and chest depth and withers height in the BS-group were significantly greater from 2 to 4 months of age (p<0.05) and at 4 months of age only (p<0.05). No difference in body length (p>0.05) was observed between the groups. These results suggest that the maternal effect of Japanese Shorthorn cows was positive for embryo-transferred Japanese Black calf growth during the early suckling stage. As Japanese Black calves are traded at a high price on the Japanese market, we conclude that this proposed production system is likely to improve the profitability of herd management in upland Japan.
Keywords
Japanese Shorthorn; Japanese Black Cattle; Embryo Transfer; Cow-calf Grazing;
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