Molecular cytogenetic data on the number and position of 45S ribosomal RNA genes (rDNA;
located in nucleolus organizing regions, NORs) detected by FISH in 330 species of 77 …

Fish exhibit the greatest diversity of all vertebrates, making this group extremely attractive for
the study of a number of evolutionary questions. Fish genomes have intrinsic characteristics …

In fishes, as in other vertebrate species, the DNA component of the telomeres consists of the
tandemly repeated TTAGGG motif. The length of the telomeric arrays in fishes ranges from 2 …

In so-called unisexual teleost fishes, a broad spectrum of evolutionary stages with varying
amounts of sexual elements has evolved. These range from pure sperm-dependent …

Hybridization and polyploidy are particular characteristics of biodiversity among cypriniform
fish. To infer ancient parentage of the tetraploids found among Japanese Cobitis loaches …

Most part of the eukaryotic genome is composed of repeated sequences or multiple copies
of DNA, which were considered as “junk DNA”, and may be associated to the …

Squalius alburnoides is a widely distributed intergeneric hybrid complex with fish of both
sexes, varying ploidy levels and proportions of the parental genomes. Its dispersal routes …

Abstract Introduction: The Pacific abalone, Haliotis discus hannai, is one of the most
commercially important marine shellfish in China. Cell engineering breeding is an important …

Polyploidy, hybridization and variation in mating systems are central issues for a deeper
understanding of animal evolution. The Iberian species Squalius alburnoides represents an …

Understanding the mechanisms underlying diversification and speciation by introgressive
hybridization is currently one of the major challenges in evolutionary biology. Here, the …