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Sex Chromosome Evolution in Cotton Stainers of the Genus Dysdercus (Heteroptera: Pyrrhocoridae)
TLDR
The hypothesis that the neo-X chromosome evolved by insertion of the original X chromosome into 1 NOR-bearing autosome in an ancestor carrying the X0 system is supported, as a consequence, the homologue of this NOR-autosome became the Neo-Y chromosome. Expand
Behaviour of ring bivalents in holokinetic systems: Alternative sites of spindle attachment in Pachylis argentinus and Nezara viridula (Heteroptera)
TLDR
This work proposes a new mode of segregation for ring bivalents: when the chromosome pair bears a secondary constriction, it is not essential that one of the chiasmata releases first since these regions or repetitive DNA sequences adjacent to them become functional as alternative sites for microtubule attachment and they undertake chromosome segregation to the poles during anaphase I. Expand
Meiosis and fluorescent banding in Edessa meditabunda and E. rufomarginata (Heteroptera: Pentatomidae: Edessinae)
TLDR
The results in E. meditabunda together with previous reports in other species of the order led us to suggest that the metaphase plate arrangement is more liable to variation at the first meiotic division than at the second one, when it is almost constant. Expand
Cytogenetic studies in Pentatomidae (Heteroptera): A review
TLDR
A bibliographic review of the chromosome number and sex determining system of 294 species and subspecies belonging to 121 genera within the subfamilies Asopinae, Discocephalinee, Edessinaes, Pentatominae), Phyllocephalinae and Podopinaes is presented. Expand
Heterochromatin characterization in five species of Heteroptera
TLDR
There should exist some constraints to the acquisition and/ or accumulation of heterochromatin in their karyotypes, according to the chiasma frequency and distribution in the five species. Expand
Heterochromatin heteromorphism in Holhymenia rubiginosa (Heteroptera: Coreidae)
TLDR
The C-band pattern in individuals of Holhymenia rubiginosa from different populations collected in different years is analyzed and it is suggested that heterochromatin should be selectively neutral in H. rubIGinosa. Expand
Male meiotic behaviour and nucleolus organizer regions in Camptischium clavipes (Fabr.) (Coreidae, Heteroptera) analyzed by fluorescent banding and in situ hybridization
TLDR
The NOR is used as a cytological marker and the observations give further support to the hypothesis on the alternate kinetic activity of telomeric regions of autosomes at meiosis I and II in Heteroptera. Expand
Karyotype evolution in Reduviidae (Insecta: Heteroptera) with special reference to Stenopodainae and Harpactorinae
TLDR
Considering the cytogenetic characteristics of Reduviidae two evolutionary trends can be observed within the family: a reduction in the number of autosomes through fusion mechanisms, and an increase in thenumber of sex chromosomes through fragmentations (multiple systems). Expand
Male meiosis, heterochromatin characterization and chromosomal location of rDNA in Microtomus lunifer (Berg, 1900) (Hemiptera: Reduviidae: Hammacerinae)
TLDR
The results led to propose that the location of rDNA genes could be associated with variants of the sex chromosome systems in relation with a kind of thesex chromosome systems within this family. Expand
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