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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Cross-species chromosome painting tracks the independent origin of multiple sex chromosomes in two cofamiliar Erythrinidae fishes

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Cioffi, Marcelo B. [1] ; Sanchez, Antonio [2] ; Marchal, Juan A. [2] ; Kosyakova, Nadezda [3] ; Liehr, Thomas [3] ; Trifonov, Vladimir [4] ; Bertollo, Luiz A. C. [1]
Total Authors: 7
[1] Univ Fed Sao Carlos, Dept Genet & Evolucao, BR-13560 Sao Carlos, SP - Brazil
[2] Univ Jaen, Dept Biol Expt, Jaen - Spain
[3] Jena Univ Hosp, Inst Human Genet, Jena - Germany
[4] Inst Chem Biol & Fundamental Med, Novosibirsk - Russia
Total Affiliations: 4
Document type: Journal article
Source: BMC Evolutionary Biology; v. 11, JUN 30 2011.
Web of Science Citations: 17

Background: The Erythrinidae fish family is characterized by a large variation with respect to diploid chromosome numbers and sex-determining systems among its species, including two multiple X(1)X(2)Y sex systems in Hoplias malabaricus and Erythrinus erythrinus. At first, the occurrence of a same sex chromosome system within a family suggests that the sex chromosomes are correlated and originated from ancestral XY chromosomes that were either homomorphic or at an early stage of differentiation. To identify the origin and evolution of these X(1)X(2)Y sex chromosomes, we performed reciprocal cross-species FISH experiments with two sex-chromosome-specific probes designed from microdissected X(1) and Y chromosomes of H. malabaricus and E. erythrinus, respectively. Results: Our results yield valuable information regarding the origin and evolution of these sex chromosome systems. Our data indicate that these sex chromosomes evolved independently in these two closed related Erythrinidae species. Different autosomes were first converted into a poorly differentiated XY sex pair in each species, and additional chromosomal rearrangements produced both X(1)X(2)Y sex systems that are currently present. Conclusions: Our data provide new insights into the origin and evolution of sex chromosomes, which increases our knowledge about fish sex chromosome evolution. (AU)

FAPESP's process: 09/14881-3 - Chromosomal evolution in the Erythrinidae family: cytogenetic mapping of repetitive DNAs and microdissection of sex chromosomes
Grantee:Marcelo de Bello Cioffi
Support Opportunities: Scholarships in Brazil - Doctorate