2011
DOI: 10.1590/s1415-47572011000200008
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Abstract: The grasshopper species Orthoscapheus rufipes and Eujivarus fusiformis were analyzed using several cytogenetic techniques. The karyotype of O. rufipes, described here for the first time, had a diploid number of 2n = 23, whereas E. fusiformis had a karyotype with 2n = 21. The two species showed the same mechanism of sex determination (XO type) but differed in chromosome morphology. Pericentromeric blocks of constitutive heterochromatin (CH) were detected in the chromosome complement of both species. CMA3/DA/DAP… Show more

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Cited by 9 publications
(9 citation statements)
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References 28 publications
(9 reference statements)
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“…The position of the 18S rDNA site in the proximal region of chromosome pair 9 in C. borelli and Amblytropidia sp corresponds to that observed in five other gomphocerine species and in 16 species of the family Acrididae Loreto et al, 2008;Rocha et al, 2011;Bueno et al, 2013), all with a karyotype of 2n = 23,X0. This finding indicates that the ancestral site was located on S9 bivalent in of Neotropical gomphocerine grasshoppers (Loreto et al, 2008).…”
Section: Discussionsupporting
confidence: 71%
See 1 more Smart Citation
“…The position of the 18S rDNA site in the proximal region of chromosome pair 9 in C. borelli and Amblytropidia sp corresponds to that observed in five other gomphocerine species and in 16 species of the family Acrididae Loreto et al, 2008;Rocha et al, 2011;Bueno et al, 2013), all with a karyotype of 2n = 23,X0. This finding indicates that the ancestral site was located on S9 bivalent in of Neotropical gomphocerine grasshoppers (Loreto et al, 2008).…”
Section: Discussionsupporting
confidence: 71%
“…Molecular cytogenetic studies using fluorescence in situ hybridization (FISH) with repetitive DNA probes, such as rDNA and histone genes, have been carried out on many grasshopper species, particularly of the family Acrididae Loreto et al, 2008;Cabrero et al, 2009;Cabral-de-Mello et al, 2011a;Oliveira et al, 2011;Rocha et al, 2011;Jetybayev et al, 2012;Bueno et al, 2013;Palacios-Gimenez et al, 2013). The objective of physical mapping of these and other repetitive DNA sequences is to provide information on chromosome structure and gene distributions in a range of species that would serve as a basis for phylogenetic studies Cabrero et al, 2009;Cabral-de-Mello et al, 2011a,b;Jetybayev et al, 2012).…”
Section: Introductionmentioning
confidence: 99%
“…The occurrence of DAPI + heterochromatin (AT-rich) in Tropidacris cristata grandis also differentiates it from Tropidacris collaris , since the karyotype of the latter species does not have AT-rich regions. The same is true for the various members of this family studied to date (Loreto et al 2008, Rocha et al 2011, Bueno et al 2013). Likewise, the DAPI + blocks of the chromosomes M 3 and M 5 of Tropidacris cristata grandis were syntenic with CMA 3 + blocks.…”
Section: Discussionmentioning
confidence: 59%
“…The sex-determination pattern considered the ancestor of grasshoppers was present in specimens of Abracris flavolineata , with males with the X0 and females with the XX sex chromosome system. In Acrididae, some species, such as Rhammatocerus brasiliensis (Bruner, 1904), R. brunneri (Giglio-Tos, 1895), R. palustris Carbonell, 1988, R. pictus (Bruner, 1900), Orthoscapheus rufipes (Thunberg, 1824), among others, show a karyotype similar to that of Abracris flavolineata , with 2n = 23,X0 and 24,XX, being considered the ancestral pattern of the family (White 1973; Loreto et al 2008b; Rocha et al 2011). …”
Section: Resultsmentioning
confidence: 99%
“…Specific C-banding techniques for the identification and classification of chromosomes have been applied more often in Abracris flavolineata species (De Geer, 1773) (Cella and Ferreira 1991, Rocha et al 2011). …”
Section: Introductionmentioning
confidence: 99%