• 제목/요약/키워드: Department of Agriculture

검색결과 11,326건 처리시간 0.035초

Genetic, management, and nutritional factors affecting intramuscular fat deposition in beef cattle - A review

  • Park, Seung Ju;Beak, Seok-Hyeon;Jung, Da Jin Sol;Kim, Sang Yeob;Jeong, In Hyuk;Piao, Min Yu;Kang, Hyeok Joong;Fassah, Dilla Mareistia;Na, Sang Weon;Yoo, Seon Pil;Baik, Myunggi
    • Asian-Australasian Journal of Animal Sciences
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    • 제31권7호
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    • pp.1043-1061
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    • 2018

  • Intramuscular fat (IMF) content in skeletal muscle including the longissimus dorsi muscle (LM), also known as marbling fat, is one of the most important factors determining beef quality in several countries including Korea, Japan, Australia, and the United States. Genetics and breed, management, and nutrition affect IMF deposition. Japanese Black cattle breed has the highest IMF content in the world, and Korean cattle (also called Hanwoo) the second highest. Here, we review results of research on genetic factors (breed and sex differences and heritability) that affect IMF deposition. Cattle management factors are also important for IMF deposition. Castration of bulls increases IMF deposition in most cattle breeds. The effects of several management factors, including weaning age, castration, slaughter weight and age, and environmental conditions on IMF deposition are also reviewed. Nutritional factors, including fat metabolism, digestion and absorption of feed, glucose/starch availability, and vitamin A, D, and C levels are important for IMF deposition. Manipulating IMF deposition through developmental programming via metabolic imprinting is a recently proposed nutritional method to change potential IMF deposition during the fetal and neonatal periods in rodents and domestic animals. Application of fetal nutritional programming to increase IMF deposition of progeny in later life is reviewed. The coordination of several factors affects IMF deposition. Thus, a combination of several strategies may be needed to manipulate IMF deposition, depending on the consumer's beef preference. In particular, stage-specific feeding programs with concentrate-based diets developed by Japan and Korea are described in this article.

  • https://doi.org/10.5713/ajas.18.0310 인용 PDF KSCI

Overexpression of the Escherichia coli catalase gene, katE, enhances tolerance to salinity stress in the transgenic indica rice cultivar, BR5

  • Moriwaki, Teppei;Yamamoto, Yujirou;Aida, Takehiko;Funahashi, Tatsuya;Shishido, Toshiyuki;Asada, Masataka;Prodhan, Shamusul Haque;Komamine, Atsushi;Motohashi, Tsuyoshi
    • Plant Biotechnology Reports
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    • 제2권1호
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    • pp.41-46
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    • 2008

  • Salinity stress is a major limiting factor in cereal productivity. Many studies report improvements in salt tolerance using model plants, such as Arabidopsis thaliana or standard varieties of rice, e.g., the japonica rice cultivar Nipponbare. However, there are few reports on the enhancement of salt tolerance in local rice cultivars. In this work, we used the indica rice (Oryza sativa) cultivar BR5, which is a local cultivar in Bangladesh. To improve salt tolerance in BR5, we introduced the Escherichia coli catalase gene, katE. We integrated the katE gene into BR5 plants using an Agrobacterium tumefaciens-mediated method. The introduced katE gene was actively expressed in the transgenic BR5 rice plants, and catalase activity in $T_1$ and $T_2$ transgenic rice was approximately 150% higher than in nontransgenic plants. Under NaCl stress conditions, the transgenic rice plants exhibited high tolerance compared with nontransgenic rice plants. $T_2$ transgenic plants survived in a 200 mM NaCl solution for 2 weeks, whereas nontransgenic plants were scorched after 4 days soaking in the same NaCl solution. Our results indicate that the katE gene can confer salt tolerance to BR5 rice plants. Enhancement of salt tolerance in a local rice cultivar, such as BR5, will provide a powerful and useful tool for overcoming food shortage problems.

  • https://doi.org/10.1007/s11816-008-0046-7 인용

Gnathostoma Hispidum Infection in Weasels

  • Kim, Su-Yeon;Kang, Sang-Chul;Yang, Hyoung-Seok;Woo, Ho-Choon;Bae, Jong-Hee;Kim, Jae-Hoon
    • 한국수의병리학회:학술대회논문집
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    • 한국수의병리학회 2004년도 추계 학술대회 초록집
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    • pp.8-8
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    • 2004

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In vitro rooting of Rehmannia glutinosa L.

  • Thwe, Aye Aye;Uddin, Md. Romij;Li, Xiaohua;Tuan, Pham Anh;Park, Woo-Tae;Park, Sang-Un
    • 한국약용작물학회:학술대회논문집
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    • 한국약용작물학회 2012년도 심포지엄 및 춘계학술발표회
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    • pp.87-88
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    • 2012

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