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Genetic analysis of offspring from intra‐ and interspecific crosses of Carassius auratus gibelio by chromosome and RAPD analysis

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The ploidy of silver crucian carp Carassius auratus gibelio individuals, originating from nine natural habitats of Hungary, was estimated by erythrocyte nucleus area analysis. On the basis of DNA polymorphism, the genetic homogeneity or heterogeneity and the chromosome number of different offspring derived from the crossing of triploid and diploid populations and of two types of silver crucian carp females with other cyprinid males (Cyprinus carpio, Carassius carassius, Carassius auratus and Barbus conchonius) were determined. The results of chromosome and RAPD analysis demonstrated that diploid females could reproduce sexually with silver crucian carp and other cyprinid males and that the offspring of intra‐ and interspecific crosses contained the paternal DNA. Triploid females usually reproduced by gynogenesis and their offspring were clones, however, in very rare cases paternal genes were actually transmitted (i.e. paternal leakage) to the offspring and the progeny were triploid interspecific hybrids. RAPD analysis showed that while the paternal DNA appeared in the offspring, the maternal phenotype was strongly expressed.
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Keywords: RAPD analysis; chromosomes; gynogenesis; silver crucian carp

Document Type: Regular Paper

Affiliations: 1: Department of Fish Culture, Szent István University, Gödöllö, Páter K. u. 1, Hungary and 2: Institute for Small Animal Research, Gödöllö, P. O. Box 417, Hungary

Publication date: 2005-03-01

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