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1

Application of dual colour FISH for localisation of canine microsatellite markers in the Chinese raccoon dog (Nyctereutes procyonoides procyonoides) genome

100%
Szczerbal I., Kubickova S., Schelling C., Dolf G., Schlapfer J., Rubes J.
Journal of Applied Genetics
|
2003
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vol. 44
|
issue 1
71-76
EN
The present study shows new chromosomal localisation of four canine cosmid clones in the Chinese raccoon dog genome by using dual colour FISH. This approach facilitates rapid physical localisation of markers and will improve the determination of their order on chromosomes. The present new assignments increase the number of physically mapped markers in the Chinese raccoon dog to 25.
2

Use of RAPD technique in evolution studies of four species in the family Canidae

88%
Stepniak E., Zagalska M. M., Switonski M.
Journal of Applied Genetics
|
2002
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vol. 43
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issue 4
489-499
EN
The RAPD-PCR technique was applied to identify genetic markers able to distinguish between four canid species: the arctic fox (Alopex lagopus), red fox (Vulpes vulpes), Chinese raccoon dog (Nyctereutes procyonoides procyonoides) and six breeds of the domestic dog (Canis familiaris). A total of 29 ten-nucleotide arbitrary primers were screened for their potential use in the differentiation of these species. Ten primers amplified RAPD profiles that made it possible to distinguish between the investigated taxa. A number of species-specific bands was scored within RAPD profiles produced by these primers: 35.6% of all the polymorphic bands were unique to the Chinese raccoon dog, 29.6% were unique to the domestic dog, 21.2% were diagnostic for the red fox and 13.6% for the arctic fox. No breed-specific fragments were amplified from canine DNA; however, three primers produced bands characteristic for the dog, but not present in all of the investigated breeds. A Neighbor-Joining tree constructed on the basis of the analysis of RAPD profiles amplified by six primers revealed that the phylogenetic distance between the dog and the arctic fox is larger than the distance between the dog and the red fox. The phylogenetic branch of the Chinese raccoon dog was the most distinct on the dendrogram, suggesting that this species belongs to a different phylogenetic lineage. Obtained results make it possible to conclude that RAPD analysis can be a powerful tool for developing molecular markers useful in distinguishing between species of the family Canidae and for studying their phylogenetic relations.
3

The dog genome map and its use in mammalian comparative genomics

75%
Switonski M., Szczerbal I., Nowacka J.
Journal of Applied Genetics
|
2004
|
vol. 45
|
issue 2
195-214
EN
The dog genome organization was extensively studied in the last ten years. The most important achievements are the well-developed marker genome maps, including over 3200 marker loci, and a survey of the DNA genome sequence. This knowledge, along with the most advanced map of the human genome, turned out to be very useful in comparative genomic studies. On the one hand, it has promoted the development of marker genome maps of other species of the family Canidae (red fox, arctic fox, Chinese raccoon dog) as well as studies on the evolution of their karyotype. But the most important approach is the comparative analysis of human and canine hereditary diseases. At present, causative gene mutations are known for 30 canine hereditary diseases. A majority of them have human counterparts with similar clinical and molecular features. Studies on identification of genes having a major impact on some multifactorial diseases (hip dysplasia, epilepsy) and cancers (multifocal renal cystadenocarcinoma and nodular dermatofibrosis) are advanced. Very promising are the results of gene therapy for certain canine monogenic diseases (haemophilia, hereditary retinal dystrophy, mucopolysaccharidosis), which have human equivalents. The above-mentioned examples prove a very important model role of the dog in studies of human genetic diseases. On the other hand, the identification of gene mutations responsible for hereditary diseases has a substantial impact on breeding strategy in the dog.
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