Chromosome spreading of associated transposable elements and ribosomal DNA in the fish Erythrinus erythrinus. Implications for genome change and karyoevolution in fish |
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| Authors: | Marcelo B Cioffi Cesar Martins Luiz AC Bertollo |
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| Institution: | 1.Departamento de Genética e Evolu??o,Universidade Federal de S?o Carlos,S?o Carlos,Brazil;2.Departamento de Morfologia,UNESP- Universidade Estadual Paulista, Instituto de Biociências,Botucatu,Brazil |
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| Abstract: | Background The fish, Erythrinus erythrinus, shows an interpopulation diversity, with four karyomorphs differing by chromosomal number, chromosomal morphology and heteromorphic
sex chromosomes. Karyomorph A has a diploid number of 2n = 54 and does not have differentiated sex chromosomes. Karyomorph
D has 2n = 52 chromosomes in females and 2n = 51 in males, and it is most likely derived from karyomorph A by the differentiation
of a multiple X1X2Y sex chromosome system. In this study, we analyzed karyomorphs A and D by means of cytogenetic approaches to evaluate their
evolutionary relationship. |
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