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Chromosomal Studies of Masculinized Hybrids in Bitterlings (Teleostei: Cypriniformes: Acheilognathinae)
Faculty of Education, Utsunomiya University, Utsunomiya, Japan
Bato High School of Tochigi Prefecture, Nasu, Japan
- 1 Faculty of Education, Utsunomiya University, Utsunomiya, Japan
- 2 Bato High School of Tochigi Prefecture, Nasu, Japan
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Abstract
The chromosome analysis of the masculinized hybrid between female Tanakia limbata and male T. signifer in bitterlings (Acheilognathinae) was done. It was presumed that they had intermediate karyotype between the parents, and formed sperms with heteroploidy resulting from the incomplete pairing of homologous chromosomes in meiosis. Due to the abundance of species and the ease of artificial fertilization, the study of the factor of the hybrid sterility in bitterlings would lead to the clarification of the mechanism about species differentiation and karyotype differentiation, and also to developing a new variety.
KeywordsBitterlingHybridChromosomeSpecies DifferentiationKaryotype EvolutionDevelop a New Variety
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