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Morphogenetical characteristics of Korean wild rat(Rattus norvegicus)
1999
Seong, J.K. | Yun, Y.M. | Park, J.Y. | Oh, S.H. (Yonsei University, Seoul (Korea Republic). Department of Laboratory Animal Medicine, Medical Research Center, College of Medicine) | Do, S.G. | Jin, H.K. | Suh, J.G. | Oh, Y.S. (Hallym University, Chuncheon (Korea Republic). Experimental Animal Center, College of Medicine) | Hyun, B.H. (Korea Institute of Science and Technology, Taejon (Korea Republic). Bioresource Program, Korea Research Institute of Bioscience and Biotechnology)
The morphometrical characteristics such as external measurements and mandible size assessment in mice and rats have to be highly heritable and sufficiently variable between strains in order to calculate a strain specific profiles. The coat color of Korean wild rats were observed and morphometric analysis of external measurements were carried out on Korean wild rats compared to laboratory strains in order to clarify the genetic characteristics of Korean wild rats and to establish background data as a domestication of Korean wild rats for new laboratory strain. Korean wild rats were captured from Chunchon and Hoengsong. 4 inbred and 1 outbred strains of rats were used in this study for the comparison of genetic characteristics of Korean wild rats. Total body length, head length, tail length, hind foot length and ear length were measured and then statistical analysis were carried out by discrimiant analysis. The coat color of Korean wild rat showed golden white in ventral portion and dark agouti in dorsal portion. Korean wild rats could be distinguished from the other laboratory strains distinctly by morphogenetical analysis. There was sighificant variations among Korean wild rat compared to those of the other laboratory strains of rat. This study may provide that Korean wild rats have a unique genetic characterization compared to those other inbred strains of rats based on morphogenetical characteristics by external measurements.
Mostrar más [+] Menos [-]A preliminary study of the genetic diversity of Xinjiang Tarim red deer (Cervus elaphus yarkandensis) using the microsatellite DNA method
2001
Mahmut, H. (Hokkaido Univ., Sapporo (Japan)) | Ganzorig, S. | Onuma, M. | Masuda, R. | Suzuki, M. | Ohtaishi, N.
To evaluate the genetic diversity of the Xinjiang Tarim red deer (Cervus elaphus yarkandensis) population, we analyzed the frequencies of microsatellite alleles. Samples were collected from 3 isolated populations in Xaya, Lopnur and Qarqan of Xinjiang. Although 10 microsatellite loci were examined, alleles of 133 to 190 base-pairs were detected for only 3 loci: BM5004, BM4208 and BM888.The average observed multilocus heterozygosity was 0.08 +- 0.04 for the Xaya, 0 for the Lopnur, and 0.17 +- 0.08 for the Qarqan population. The average heterozygosity of all populations was 0.08 +- 0.02. The observed heterozygosities were significantly lower than the expected values. The present results suggest that the bottleneck effect has occurred in the populations ofthe Xinjiang Tarim red deer.
Mostrar más [+] Menos [-]A genetic improvement program for Kedah-Kelantan cattle
2012
Raymond A. K. | Abu-Hassan M. A.
Kedah-Kelantan cattle (KK) being an indigenous breed are highly adapted to the hot-humid Malaysian climate and can survive in harsh, marginal environments. This makes the KK a valuable genetic resource, given the challenges of climate change and the changing demands of the livestock sector. Hitherto there is no comprehensive programme to genetically improve the purebred KK. Genetic improvement of the KK would be to fulfill the breeding objectives of increasing lean meat growth rate, enhancing meat quality, raising feed efficiency, improving fertility and maintaining adaptability. The breeding structure proposed is a 2-tier breeding structure, with a nucleus tier followed by a commercial tier below it. The nucleus tier would comprise of a number of pedigree farms run as a community
breeding project. A sire reference scheme is proposed, where progeny of reference sires are used as genetic links between pedigree herds and between years. Some guidelines are offered on the establishment
and implementation of the scheme. Modern breeding technology such as BLUP using an Animal Model, artificial insemination, embryo transfer, tissue scanning, MAS and MAI could be used as tools to support the KK genetic improvement programme. To address the problem of genetic erosion, emphasis should be given to the conservation and sustainable utilization of the KK. The programme is expected to have a high impact on the livestock sector. Substantial investments are needed to develop infrastructure and human capital associated with the KK breeding programme. The establishment of a KK breed society will improve awareness concerning the KK and protect the interests
of the KK breeding community.
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