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456 results on '"Geldermann, H."'

2. Comparison of Vietnamese and European pig breeds using microsatellites

Author

Thuy, N.T.D., Melchinger-Wild, E., Kuss, A.W., Cuong, N.V., Bartenschlager, H., and Geldermann, H.

Subjects
Swine -- Research, Swine -- Comparative analysis, Zoology and wildlife conservation
Abstract

This study characterized autochthonous pig breeds of Vietnam and compared them with breeds from other regions. A total of 343 animals were considered from 5 indigenous pig breeds of Vietnam (Muong Khuong, Co, Meo, Tap Na, and Mong Cai), 2 exotic breeds kept in Vietnam (Landrace and Yorkshire), 3 European commercial breeds (German Landrace, Pietrain, and Large White), the Chinese breed Meishan, and the European Wild Boar. Each individual was genotyped for 20 selected polymorphic microsatellite loci. The Vietnamese autochthonous breeds showed higher degrees of polymorphism, allelic diversity, and heterozygosity than the other pig breeds. Also, large genetic diversity was observed across the area of distribution, with village-specific subpopulations, which led to significant inbreeding coefficients. As expected, genetic distances showed large differences among European-based, Chinese, and Vietnamese indigenous breeds and reflected the geographical distribution of breeds. In comparison with the European breeds, the Vietnamese indigenous pig breeds harbored a considerable amount of genetic diversity and, therefore, will be of significance for livestock bioconservation. Key words: genetic distance, genetic diversity, microsatellite, pig breed

Published
2006

3. Large-scale, multibreed, multitrait analyses of quantitative trait loci experiments: The case of porcine X chromosome

Author

Perez-Enciso, M., Mercade, A., Bidanel, J.P., Geldermann, H., Cepica, S., Bartenschlager, H., Varona, L., Milan, D., and Folch, J.M.

Subjects
Swine -- Genetic aspects, Swine -- Research, Genetic research, Zoology and wildlife conservation
Abstract

A QTL analysis of multibreed experiments (i.e., crossed populations involving more than two founder breeds) offers clear advantages over classical two-breed crosses, among them increased power and a more comprehensive coverage of the total genetic variability in the species. An alternative to designed multibreed crosses is to reanalyze jointly several experiments involving different breeds. We report a multibreed, multitrait QTL analysis of SSCX that involves five different crosses, six breeds, and almost 3,000 genotyped individuals using a truly multibreed strategy to allow for any number of founder breed origins. Traits analyzed were growth, fat thickness, car-cass length, and shoulder and ham weights. Generally, the joint analysis resulted in more significant QTL than the single-experiment analyses. We show that the QTL for fatness, which is highly significant (nominal P < [10.sup.-43]), is of Asiatic origin (Meishan). The next most significant QTL (nominal P < [10.sup.15]) affected ham weight and seems to be segregating only between Large White and the rest of the breeds. A multitrait, multi-QTL analysis suggests that these are two distinct loci. Additionally, a locus segregating only between Iberian and Landrace affects live weight. The advantages of joint, multibreed analyses clearly outweigh their potential risks. Key Words: Fatness, Growth, Pig, Quantitative Trait Locus, Sex Chromosome

Published
2005

13. The PiGMaP consortium linkage map of the pig (Sus scrofa)

Author

Archibald, A. L., Haley, C. S., Brown, J. F., Couperwhite, S., McQueen, H. A., Nicholson, D., Coppieters, W., Van de Weghe, A., Stratil, A., Winterø, A. K., Fredholm, M., Larsen, N. J., Nielsen, V. H., Milan, D., Woloszyn, N., Robic, A., Dalens, M., Riquet, J., Gellin, J., Caritez, J. -C., Burgaud, G., Ollivier, L., Bidanel, J. -P., Vaiman, M., Renard, C., Geldermann, H., Davoli, R., Ruyter, D., Verstege, E. J. M., Groenen, M. A. M., Davies, W., Høyheim, B., Keiserud, A., Andersson, L., Ellegren, H., Johansson, M., Marklund, L., Miller, J. R., Anderson Dear, D. V., Signer, E., Jeffreys, A. J., Moran, C., Le Tissier, P., Muladno, Rothschild, M. F., Tuggle, C. K., Vaske, D., Helm, J., Liu, H. -C., Rahman, A., Yu, T. -P., Larson, R. G., and Schmitz, C. B.

Published
1995
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