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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.)

Cytogenetics Analysis and Testis Morphology of Aquatic Species of the Families Belostomatidae, Gelastocoridae, Gerridae, Notonectidae, and Veliidae (Heteroptera)

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Vicente Pereira, Luis Lenin [1] ; Chaboli Alevi, Kaio Cesar [2] ; Urbanin Castanhole, Marcia Maria [1] ; Figueiredo Moreira, Felipe Ferraz [3] ; Barbosa, Julianna Freires [4] ; Itoyama, Mary Massumi [1]
Total Authors: 6
[1] Univ Estadual Paulista, UNESP, Dept Biol, Lab Citogenet & Mol Insetos, Sao Jose Do Rio Preto, SP - Brazil
[2] Univ Estadual Paulista, UNESP, Dept Biol, Lab Biol Celular, Sao Jose Do Rio Preto, SP - Brazil
[3] Inst Oswaldo Cruz, Lab Nacl & Int Referencia Taxon Triatomineos, BR-21045900 Rio De Janeiro, RJ - Brazil
[4] Univ Fed Rio de Janeiro, Inst Biol, Dept Zool, Entomol Lab, Rio De Janeiro, RJ - Brazil
Total Affiliations: 4
Document type: Journal article
Source: JOURNAL OF INSECT SCIENCE; v. 15, MAR 22 2015.
Web of Science Citations: 4

The Heteroptera have holocentric chromosomes with kinetic activity restricted to the end of chromosomes. The first meiotic division is reductional for the autosomes and equational for the sexual. Only a few species of this suborder have been analyzed. In this study, we observed the morphologies of the testes of the Heteroptera species Belostoma anurum (Herrich-Schaffer, 1948), Belostoma micantulum (Stal, 1858), Gelastocoris angulatus (Melin, 1929), Gelastocoris flavus flavus (Guerin-Meneville, 1844), Rheumatobates crassifemur crassifemur (Esaki, 1926), Buenoa amnigenus (White, 1879), Buenoa unguis (Truxal, 1953), Martarega brasiliensis (Truxal, 1949), Martarega membranacea (White, 1879), Martarega uruguayensis (Berg, 1883), Rhagovelia tenuipes (Champion, 1898) and Rhagovelia zela (Drake, 1959). We found that the testes of these species can be round, round/spiral, or elongated/spiral. The size of the prophase I cells was found to vary, with the smallest ones being detected in B. micantulum and Rha. zela, the largest in G. f. flavus, and ones of intermediate size in R. c. crassifemur and M. brasiliensis. With respect to the chromosome complement, we verified the presence of 2n = 16 (14A+XY, B. micantulum and G. angulatus), 21 (20A+X0, R. c. crassifemur), 23 (22A+X0, Rha. zela and Rha. tenuipes), 25 (24A+X0, Bu. amnigenus and Bu. unguis; 22A+2m+X0, M. membranacea), 27 (24A+2m+X0, M. brasiliensis and M. uruguayensis), 29 (26A+X1X2Y, B. anurum), and 35 (30A+X1X2X3X4Y, G. f. flavus). We found that the features of spermatogenesis in these species are similar to those of other previously described Heteroptera species, differing only in testicular morphology, chromosome number, and sex chromosome system. (AU)

FAPESP's process: 07/07064-3 - Observations on spermatogenesis and nucleolar behaviour in economically important species from the Pentatomidae family (Heteroptera)
Grantee:Mary Massumi Itoyama
Support type: Regular Research Grants