Comportamento dos cromossômios no gênero Hypselonotus (Hemiptera -Coreidae)

Castro, G. P. de

doi:10.1590/s0071-12761947000100018

Cited by 1 publication

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“…The chromosomal characteristics for the other species were identical to the previous descriptions (Bowen 1922;De Castro 1947;Ueshima 1979;Colombo and Bidau 1985;Papeschi and Mola 1989; Rebagliati et al Souza et al 2008). For Coreidae, the diploid number variability observed here, was also previously noticed (Bressa et al 2005;Franco et al 2006), like the presence of X0 sex system in males and the occurrence of m-chromosomes (see details in Papeschi and Bressa 2006), except in A. hahni.…”

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confidence: 88%

Chromosomal evolutionary dynamics of four multigene families in Coreidae and Pentatomidae (Heteroptera) true bugs

2016

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Previous chromosome mapping of multigene families in Pentatomomorpha (Heteroptera) insects, which was restricted to the major rDNA, revealed remarkable conservation of number of clusters and chromosomal positions. Aiming to understand the chromosomal organization and evolutionary patterns of multigene families in karyotypes of Heteroptera, we performed a chromosomal mapping using four distinct multigene families in representatives of Coreidae (ten species) and Pentatomidae (five species). A single pair of the major rDNA cluster (18S rDNA probe) and a single pair of the minor rDNA cluster (5S rDNA probe), both terminally located were primarily observed, being, in most species, located in distinct chromosomes. However, some alternative patterns were also observed. In species in which the U2 snDNA and H4 gene clusters were mapped, they were mainly located in one autosomal pair each, wherein the H4 gene cluster was located in different positions. Our data suggest that the karyotype diversity reported in Coreidae is not reflected in the distribution diversity of multigene families. This contrasts with the data for Pentatomidae, with a conserved gross karyotype but a discrete diversity in the location of the clusters of multigene families, indicating genome dynamics for these markers. The findings are discussed to shed light on the possible causes for the conservation or variation observed and to assist in understanding the chromosomal evolutionary trends in the group.

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