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National Repository of Grey Literature 1 records found  Search took 0.00 seconds. 
Hybridisation of cyprinid fishes in the Czech Republic: genetic and morphometric analysis of the subfamily Leuciscinae
 Kaufman, Vít ; Musilová, Zuzana (advisor) ; Choleva, Lukáš (referee)
Hybridization is a process when two interspecific individuals mate and spawn. When backcrossing it often goes hand in hand with admixing unrelated genome into the genome of a species. Nowadays it is well established that hybridization is not as uncommon as it was believed. Especially in vertebrates fish are quite common in such phenomena. In Leuciscids, the family of order Cypriniformes is relatively frequent. It is a rife family in the European freshwater systems. Factors that contribute to such frequent hybridization are extraneous fertilization, sympatric occurrence, competition for spawning grounds, and other ecophysiological traits. It was known since the second half of 20th century that this is an ongoing phenomenon in many species of this family. Previous research was focused mainly on morphological traits. The relative pinnacle of such research was based on allozymic analysis. The goal of our project was to evaluate the level of hybridization in the main water bodies of the Czech Republic with the main focus on the detection of involved hybrid species, the level of such hybridization, and the phenotypic characterization of hybrid individuals. For that reason, it was sampled over 400 specimens giving a dataset of 381 individuals. Tissue samples were sampled for DNA isolation and each of the...
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