Latest Articles from Comparative Cytogenetics Latest 15 Articles from Comparative Cytogenetics https://compcytogen.pensoft.net/ Thu, 28 Mar 2024 14:20:07 +0200 Pensoft FeedCreator https://compcytogen.pensoft.net/i/logo.jpg Latest Articles from Comparative Cytogenetics https://compcytogen.pensoft.net/ A rare chromosomal polymorphism in a Kangayam bull (Bos indicus) of south India https://compcytogen.pensoft.net/article/71295/ Comparative Cytogenetics 15(4): 459-465

DOI: 10.3897/CompCytogen.v15.i4.71295

Authors: Vemula Harshini, P. Kumarasamy, S.M.K. Karthickeyan

Abstract: A chromosomal polymorphism was detected on karyological screening of Kangayam breeding sires prior to subjecting them for frozen semen collection. One bull possessed the chromosomal complement 2n = 60, consisting of 58 acrocentric autosomes, one large sub-metacentric X-chromosome, and one small acrocentric Y-chromosome with a small visible p-arm, which was further confirmed using CBG- and GTG-banding. This polymorphism was attributed to a heterochromatin variation of the acrocentric Y-chromosome routine in the Bos indicus Linnaeus, 1758 cattle.

HTML

XML

PDF

]]>
Short Communication Wed, 15 Dec 2021 11:45:00 +0200
Comparative cytogenetics of two species of Dermanura (Chiroptera, Phyllostomidae) in Midwestern Brazil https://compcytogen.pensoft.net/article/60577/ Comparative Cytogenetics 15(2): 89-99

DOI: 10.3897/CompCytogen.v15.i2.60577

Authors: Ricardo Firmino de Sousa, Paulo Cesar Venere, Karina de Cassia Faria

Abstract: Dermanura Gervais, 1856 is represented by small frugivorous bats of the Stenodermatinae subfamily. The taxonomy of this group presents controversies and has been subject to changes, especially since the morphological characters evaluated have left gaps that are difficult to fill regarding good species characterization. Previous studies performed in Dermanura cinerea Gervais, 1856 found that the karyotype of this species has a diploid number of chromosomes equal to 30 and 56 autosomal arms. The objective of the present study was to describe, for the first time, the karyotypes of the species Dermanura anderseni (Osgood, 1916) and Dermanura gnoma (Handley, 1987) based on classical cytogenetic markers. For both species, the diploid number found was 2n = 30 and NFa = 56. Two pairs of chromosomes showed markings of the nucleolus organizing regions (AgNORs) in the species D. anderseni and only one pair in D. gnoma, differing from what has already been described for D. cinerea. The two species analyzed here also showed differences in the sex chromosome system, with D. gnoma showing a neo-XY type system while in D. anderseni the classic XY sexual system was observed. In both species, visualization of the constitutive heterochromatin occurred in the pericentromeric region of all chromosomes, as well as in the short arms of the subtelocentric chromosomes. The present work represents an important expansion of karyotypic information for the subfamily Stenodermatinae, bringing chromosomal features that are possible to use in the taxonomic implications of the group.

HTML

XML

PDF

]]>
Research Article Fri, 2 Apr 2021 12:07:15 +0300
DNA-barcoding and a new data about the karyotype of Myotis petax (Chiroptera, Vespertilionidae) in the Russian Far East https://compcytogen.pensoft.net/article/54955/ Comparative Cytogenetics 14(4): 483-500

DOI: 10.3897/CompCytogen.v14.i4.54955

Authors: Uliana V. Gorobeyko, Irina V. Kartavtseva, Irina N. Sheremetyeva, Denis V. Kazakov, Valentin Yu. Guskov

Abstract: The DNA-barcoding and chromosomal study of the eastern water bat, Myotis petax Hollister, 1912, from the earlier unexplored localities in the Russian Far East are carried out. The COI barcoding obtained for 18 from a total of 19 individuals captured in five localities in the Russian Far East showed the low nucleotide variability with the prevalence of the central, the most abundant haplotype. The chromosomal characteristics of eight M. petax specimens (2n = 44, NFa = 52) in the Russian Far East are clarified. The number and localization of NOR in karyotype of M. petax is described at the first time and differ from distributional patterns of NOR in the sibling species M. daubentonii Kuhl, 1819 that can be used as diagnostic feature. The considerable intraspecific variability in the distribution of heterochromatin material revealed is not typical of the genus Myotis, but it has been found in other species of the family Vespertilionidae.

HTML

XML

PDF

]]>
Research Article Mon, 19 Oct 2020 11:08:31 +0300
The occurrence of dot-like micro B chromosomes in Korean field mice Apodemus peninsulae from the shore of the Teletskoye Lake (Altai Mountains) https://compcytogen.pensoft.net/article/47659/ Comparative Cytogenetics 14(1): 97-105

DOI: 10.3897/CompCytogen.v14i1.47659

Authors: Yuriy M. Borisov, Sergey A. Abramov, Marina Y. Borisova, Igor A. Zhigarev

Abstract: The data on the changes in the cytogenetic structure of the geographic population of Korean field mouse Apodemus (Alsomys) peninsulae Thomas, 1907 at the southern shore of the Teletskoye Lake (Altai Republic) are presented. In 1980 no dot-like microchromosomes were found in 34 mice captured on the southern and northern coasts of the Teletskoye Lake. In 2011, a 1.6-fold (from 2.7 to 4.3) increase in the mean number of B chromosomes compared to the rate estimated there earlier in 1980 was discovered. In 11 of the 15 mice (73%) captured in 2011, the karyotypes contained 1–2 dot-like micro B chromosomes and 1–5 macro B chromosomes. The pollution of the territory by the remains of the rocket fuel components may be an appropriate explanation for the cause of the karyological changes observed in A. peninsulae in this region.

HTML

XML

PDF

]]>
Research Article Wed, 4 Mar 2020 16:08:37 +0200
Rapid chromosomal evolution in enigmatic mammal with XX in both sexes, the Alay mole vole Ellobius alaicus Vorontsov et al., 1969 (Mammalia, Rodentia) https://compcytogen.pensoft.net/article/34224/ Comparative Cytogenetics 13(2): 147-177

DOI: 10.3897/CompCytogen.v13i2.34224

Authors: Irina Bakloushinskaya, Elena A. Lyapunova, Abdusattor S. Saidov, Svetlana A. Romanenko, Patricia C.M. O’Brien, Natalia A. Serdyukova, Malcolm A. Ferguson-Smith, Sergey N. Matveevsky, Aleksey S. Bogdanov

Abstract: Evolutionary history and taxonomic position for cryptic species may be clarified by using molecular and cytogenetic methods. The subterranean rodent, the Alay mole vole Ellobius alaicus Vorontsov et al., 1969 is one of three sibling species constituting the subgenus Ellobius Fischer, 1814, all of which lost the Y chromosome and obtained isomorphic XX sex chromosomes in both males and females. E. alaicus is evaluated by IUCN as a data deficient species because their distribution, biology, and genetics are almost unknown. We revealed specific karyotypic variability (2n = 52–48) in E. alaicus due to different Robertsonian translocations (Rbs). Two variants of hybrids (2n = 53, different Rbs) with E. tancrei Blasius, 1884 were found at the Northern slopes of the Alay Ridge and in the Naryn district, Kyrgyzstan. We described the sudden change in chromosome numbers from 2n = 50 to 48 and specific karyotype structure for mole voles, which inhabit the entrance to the Alay Valley (Tajikistan), and revealed their affiliation as E. alaicus by cytochrome b and fragments of nuclear XIST and Rspo1 genes sequencing. To date, it is possible to expand the range of E. alaicus from the Alay Valley (South Kyrgyzstan) up to the Ferghana Ridge and the Naryn Basin, Tien Shan at the north-east and to the Pamir-Alay Mountains (Tajikistan) at the west. The closeness of E. tancrei and E. alaicus is supported, whereas specific chromosome and molecular changes, as well as geographic distribution, verified the species status for E. alaicus. The case of Ellobius species accented an unevenness in rates of chromosome and nucleotide changes along with morphological similarity, which is emblematic for cryptic species.

HTML

XML

PDF

]]>
Data Paper Thu, 20 Jun 2019 22:46:52 +0300
First cytogenetic analysis of lesser gymnures (Mammalia, Galericidae, Hylomys) from Vietnam https://compcytogen.pensoft.net/article/27207/ Comparative Cytogenetics 12(3): 361-372

DOI: 10.3897/CompCytogen.v12i3.27207

Authors: Svetlana V. Pavlova, Larisa S. Biltueva, Svetlana A. Romanenko, Natalya A. Lemskaya, Anton V. Shchinov, Alexei V. Abramov, Viatcheslav V. Rozhnov

Abstract: Gymnures are an ancient group of small insectivorous mammals and are characterized by a controversial taxonomic status and the lack of a description of karyotypes for certain species. In this study, conventional cytogenetic techniques (Giemsa, CBG- and GTG-banding, Ag-NOR), CMA3-DAPI staining, and fluorescent in situ hybridization (FISH) with telomeric DNA probes were used to examine for the first time the karyotypes of lesser gymnures of group Hylomys suillus Müller, 1840 from northern and southern Vietnam. All studied specimens had karyotypes with 2n=48, NFa=64. C-positive heterochromatic blocks existed in centromeric regions of 7 bi-armed autosomes and the submetacentric X chromosome. The Y chromosome is a C-positive and dot-like. The nucleolus organizer regions resided terminally on the short arms of 2 small bi-armed pairs. Positive signals at the telomeres of all chromosomes were revealed by FISH. CMA3-positive blocks were localized on the telomeric and pericentric regions of most bi-armed and acrocentric chromosomes. Despite the large genetic distances between Hylomys Müller, 1840, lesser gymnures from H. suillus-group from northern and southern Vietnam have similar karyotypic characteristics.

HTML

XML

PDF

]]>
Research Article Thu, 23 Aug 2018 15:54:43 +0300
Evolutionary insight on localization of 18S, 28S rDNA genes on homologous chromosomes in Primates genomes https://compcytogen.pensoft.net/article/19381/ Comparative Cytogenetics 12(1): 27-40

DOI: 10.3897/CompCytogen.v12i1.19381

Authors: Sofia Mazzoleni, Michail Rovatsos, Odessa Schillaci, Francesca Dumas

Abstract: We explored the topology of 18S and 28S rDNA units by fluorescence in situ hybridization (FISH) in the karyotypes of thirteen species representatives from major groups of Primates and Tupaia minor (Günther, 1876) (Scandentia), in order to expand our knowledge of Primate genome reshuffling and to identify the possible dispersion mechanisms of rDNA sequences. We documented that rDNA probe signals were identified on one to six pairs of chromosomes, both acrocentric and metacentric ones. In addition, we examined the potential homology of chromosomes bearing rDNA genes across different species and in a wide phylogenetic perspective, based on the DAPI-inverted pattern and their synteny to human. Our analysis revealed an extensive variability in the topology of the rDNA signals across studied species. In some cases, closely related species show signals on homologous chromosomes, thus representing synapomorphies, while in other cases, signal was detected on distinct chromosomes, leading to species specific patterns. These results led us to support the hypothesis that different mechanisms are responsible for the distribution of the ribosomal DNA cluster in Primates.

HTML

XML

PDF

]]>
Research Article Wed, 24 Jan 2018 16:12:34 +0200
Advances in cytogenetics of Brazilian rodents: cytotaxonomy, chromosome evolution and new karyotypic data https://compcytogen.pensoft.net/article/19925/ Comparative Cytogenetics 11(4): 833-892

DOI: 10.3897/CompCytogen.v11i4.19925

Authors: Camilla Bruno Di-Nizo, Karina Rodrigues da Silva Banci, Yukie Sato-Kuwabara, Maria José de J. Silva

Abstract: Rodents constitute one of the most diversified mammalian orders. Due to the morphological similarity in many of the groups, their taxonomy is controversial. Karyotype information proved to be an important tool for distinguishing some species because some of them are species-specific. Additionally, rodents can be an excellent model for chromosome evolution studies since many rearrangements have been described in this group.This work brings a review of cytogenetic data of Brazilian rodents, with information about diploid and fundamental numbers, polymorphisms, and geographical distribution. We point out that, even with the recent efforts on cytogenetic studies in this group, many species lack karyotypic data. Moreover, we describe for the first time the karyotype of Carterodon sulcidens (Lund, 1838) (Family Echimyidae), a new fundamental number for an undescribed species of Neacomys Thomas, 1900 (Family Cricetidae, Subfamily Sigmodontinae), and illustrate the karyotype of a Brazilian specimen of Mus musculus Linnaeus, 1758 (Family Muridae). This review compiles the cytogenetic data on Brazilian rodents reported in the last three decades, after the last revision published in 1984, including synonyms, chromosomal variations, and geographic distribution. Additionally, it also reinforces that Brazilian biodiversity is still poorly known, considering the new data reported here.

HTML

XML

PDF

]]>
Research Article Thu, 21 Dec 2017 12:27:08 +0200
“European” race-specific metacentrics in East Siberian common shrews (Sorex araneus): a description of two new chromosomal races, Irkutsk and Zima https://compcytogen.pensoft.net/article/19800/ Comparative Cytogenetics 11(4): 797-806

DOI: 10.3897/CompCytogen.v11i4.19800

Authors: Svetlana V. Pavlova, Sergei A. Borisov, Alexander F. Timoshenko, Boris I. Sheftel

Abstract: Karyotype studies of common shrews in the vicinity of Lake Baikal (Irkutsk Region, Eastern Siberia) resulted in the description of two new chromosomal races of Sorex araneus Linnaeus, 1758 (Lypotyphla, Mammalia), additional to 5 races formerly found in Siberia. In the karyotypes of 12 specimens from 3 locations, the polymorphism of metacentric and acrocentric chromosomes of the Robertsonian type was recorded and two distinct groups of karyotypes interpreted as the chromosomal races were revealed. They are geographically distant and described under the racial names Irkutsk (Ir) and Zima (Zi). Karyotypes of both races were characterized by species-specific (the same for all 74 races known so far) metacentric autosomes af, bc, tu and jl, and the typical sex chromosome system – XX/XY1Y2. The race-specific arm chromosome combinations include three metacentrics and four acrocentrics in the Irkutsk race (gk, hi, nq, m, o, p, r) and four metacentrics and two acrocentrics in the Zima race (gm, hi, ko, nq, p, r). Within the races, individuals with polymorphic chromosomes were detected (g/m, k/o, n/q, p/r). The presence of the specific metacentric gk allowed us to include the Irkutsk race into the Siberian Karyotypic Group (SKG), distributed in surrounding regions. The Zima race karyotype contained two metacentrics, gm and ko, which have been never found in the Siberian part of the species range, but appear as the common feature of chromosomal races belonging to the West European Karyotypic Group (WEKG). Moreover, the metacentrics of that karyotype are almost identical to the Åkarp race (except the heterozygous pair p/r) locally found in the southern Sweden. One of two Siberian races described here for the first time, the Zima race, occurs in an area considerably distant from Europe and shares the common metacentrics (gm, hi, ko) with races included in WEKG. This fact may support a hypothesis of independent formation of identical arm chromosome combinations due to occurrence of the same centric fusions in different parts of the species range.

HTML

XML

PDF

]]>
Research Article Fri, 24 Nov 2017 17:05:14 +0200
Dual mechanism of chromatin remodeling in the common shrew sex trivalent (XY 1Y 2) https://compcytogen.pensoft.net/article/13870/ Comparative Cytogenetics 11(4): 727-745

DOI: 10.3897/compcytogen.v11i4.13870

Authors: Sergey N. Matveevsky, Svetlana V. Pavlova, Maret M. Atsaeva, Jeremy B. Searle, Oxana L. Kolomiets

Abstract: Here we focus on the XY1Y2 condition in male common shrew Sorex araneus Linnaeus, 1758, applying electron microscopy and immunocytochemistry for a comprehensive analysis of structure, synapsis and behaviour of the sex trivalent in pachytene spermatocytes. The pachytene sex trivalent consists of three distinct parts: short and long synaptic SC fragments (between the X and Y1 and between the X and Y2, respectively) and a long asynaptic region of the X in-between. Chromatin inactivation was revealed in the XY1 synaptic region, the asynaptic region of the X and a very small asynaptic part of the Y2. This inactive part of the sex trivalent, that we named the ‘head’, forms a typical sex body and is located at the periphery of the meiotic nucleus at mid pachytene. The second part or ‘tail’, a long region of synapsis between the X and Y2 chromosomes, is directed from the periphery into the nucleus. Based on the distribution patterns of four proteins involved in chromatin inactivation, we propose a model of meiotic silencing in shrew sex chromosomes. Thus, we conclude that pachytene sex chromosomes are structurally and functionally two different chromatin domains with specific nuclear topology: the peripheral inactivated ‘true’ sex chromosome regions (part of the X and the Y1) and more centrally located transcriptionally active autosomal segments (part of the X and the Y2).

HTML

XML

PDF

]]>
Research Article Fri, 3 Nov 2017 13:41:40 +0200
Heterochromatin variation and LINE-1 distribution in Artibeus (Chiroptera, Phyllostomidae) from Central Amazon, Brazil https://compcytogen.pensoft.net/article/14562/ Comparative Cytogenetics 11(4): 613-626

DOI: 10.3897/CompCytogen.v11i4.14562

Authors: Érica Martinha Silva de Souza, Maria Claudia Gross, Carlos Eduardo Faresin Silva, Cibele G. Sotero-Caio, Eliana Feldberg

Abstract: Species in the subgenus Artibeus Leach, 1821 are widely distributed in Brazil. Conserved karyotypes characterize the group with identical diploid number and chromosome morphology. Recent studies suggested that the heterochromatin distribution and accumulation patterns can vary among species. In order to assess whether variation can also occur within species, we have analyzed the chromosomal distribution of constitutive heterochromatin in A. planirostris (Spix, 1823) and A. lituratus (Olfers, 1818) from Central Amazon (North Brazil) and contrasted our findings with those reported for other localities in Brazil. In addition, Ag-NOR staining and FISH with 18S rDNA, telomeric, and LINE-1 probes were performed to assess the potential role that these different repetitive markers had in shaping the current architecture of heterochromatic regions. Both species presented interindividual variation of constitutive heterochromatin. In addition, in A. planirostris the centromeres of most chromosomes are enriched with LINE-1, colocated with pericentromeric heterochromatin blocks. Overall, our data indicate that amplification and differential distribution of the investigated repetitive DNAs might have played a significant role in shaping the chromosome architecture of the subgenus Artibeus.

HTML

XML

PDF

]]>
Short Communication Thu, 14 Sep 2017 12:15:39 +0300
Study of male–mediated gene flow across a hybrid zone in the common shrew (Sorex araneus) using Y chromosome https://compcytogen.pensoft.net/article/13494/ Comparative Cytogenetics 11(2): 421-430

DOI: 10.3897/CompCytogen.v11i2.13494

Authors: Andrei V. Polyakov, Viktor V. Panov

Abstract: Despite many studies, the impact of chromosome rearrangements on gene flow between chromosome races of the common shrew (Sorex araneus Linnaeus, 1758) remains unclear. Interracial hybrids form meiotic chromosome complexes that are associated with reduced fertility. Nevertheless comprehensive investigations of autosomal and mitochondrial markers revealed weak or no barrier to gene flow between chromosomally divergent populations. In a narrow zone of contact between the Novosibirsk and Tomsk races hybrids are produced with extraordinarily complex configurations at meiosis I. Microsatellite markers have not revealed any barrier to gene flow, but the phenotypic differentiation between races is greater than may be expected if gene flow was unrestricted. To explore this contradiction we analyzed the distribution of the Y chromosome SNP markers within this hybrid zone. The Y chromosome variants in combination with race specific autosome complements allow backcrosses to be distinguished and their proportion among individuals within the hybrid zone to be evaluated. The balanced ratio of the Y variants observed among the pure race individuals as well as backcrosses reveals no male mediated barrier to gene flow. The impact of reproductive unfitness of backcrosses on gene flow is discussed as a possible mechanism of the preservation of race-specific morphology within the hybrid zone.

HTML

XML

PDF

]]>
Research Article Mon, 19 Jun 2017 16:12:23 +0300
Intense genomic reorganization in the genus Oecomys (Rodentia, Sigmodontinae): comparison between DNA barcoding and mapping of repetitive elements in three species of the Brazilian Amazon https://compcytogen.pensoft.net/article/8306/ Comparative Cytogenetics 10(3): 401-426

DOI: 10.3897/compcytogen.v10i3.8306

Authors: Renan Gabriel Gomes Junior, Carlos Henrique Schneider, Thatianna de Lira, Natália Dayane Moura Carvalho, Eliana Feldberg, Maria Nazareth Ferreira da Silva, Maria Claudia Gross

Abstract: Oecomys Thomas, 1906 is one of the most diverse and widely distributed genera within the tribe Oryzomyini. At least sixteen species in this genus have been described to date, but it is believed this genus contains undescribed species. Morphological, molecular and cytogenetic study has revealed an uncertain taxonomic status for several Oecomys species, suggesting the presence of a complex of species. The present work had the goal of contributing to the genetic characterization of the genus Oecomys in the Brazilian Amazon. Thirty specimens were collected from four locations in the Brazilian Amazon and three nominal species recognized: Oecomys auyantepui (Tate, 1939), O. bicolor (Tomes, 1860) and O. rutilus (Anthony, 1921). COI sequence analysis grouped O. auyantepui, O. bicolor and O. rutilus specimens into one, three and two clades, respectively, which is consistent with their geographic distribution. Cytogenetic data for O. auyantepui revealed the sympatric occurrence of two different diploid numbers, 2n=64/NFa=110 and 2n=66/NFa=114, suggesting polymorphism while O. bicolor exhibited 2n=80/NFa=142 and O. rutilus2n=54/NFa=90. The distribution of constitutive heterochromatin followed a species-specific pattern. Interspecific variation was evident in the chromosomal location and number of 18S rDNA loci. However, not all loci showed signs of activity. All three species displayed a similar pattern for 5S rDNA, with only one pair carrying this locus. Interstitial telomeric sites were found only in O. auyantepui. The data presented in this work reinforce intra- and interspecific variations observed in the diploid number of Oecomys species and indicate that chromosomal rearrangements have led to the appearance of different diploid numbers and karyotypic formulas.

HTML

XML

PDF

]]>
Research Article Thu, 8 Sep 2016 11:46:11 +0300
Chromosomal variation in Argentine populations of Akodon montensis Thomas, 1913 (Rodentia, Cricetidae, Sigmodontinae) https://compcytogen.pensoft.net/article/6420/ Comparative Cytogenetics 10(1): 129-140

DOI: 10.3897/CompCytogen.v10i1.6420

Authors: Matías Malleret, Carolina Labaroni, Gabriela Verónica García, Juan Ferro, Dardo Andrea Marti, Cecilia Lanzone

Abstract: The genus Akodon Meyen, 1833 is one of the most species-rich among sigmodontine rodents and has great chromosome variability. Akodon montensis has a relatively broad distribution in South America, and Argentine populations are located in the southernmost region of its range. Brazilian populations have important chromosomal variability, but cytogenetic data from Argentina are scarce. We performed a chromosome characterization of natural populations of A. montensis using conventional staining, C-banding, Ag-NORs and base-specific fluorochromes. A total of 31 specimens from five localities of Misiones Province, in Argentina, were analyzed. The 2n=24 chromosomes was the most frequently observed karyotype. However, five individuals presented 25 chromosomes due to a supernumerary B-chromosome; and one individual had 2n=26 due to one B plus a trisomy for chromosome 11. Additionally, two XY females and two variants of the X chromosomes were found. C-positive centromeric bands occurred in all chromosomes; additional C-bands were observed in some autosomes, the X, Y and B chromosomes. Ag-NORs were observed in five autosomes, and the B chromosome was frequently marked. Fluorochrome banding was similar among karyotypes of the analyzed populations. Comparisons of cytogenetic data among populations of Argentina and Brazil showed the presence of high intraspecific variability in A. montensis and some differences among regions.

HTML

XML

PDF

]]>
Research Article Tue, 2 Feb 2016 12:57:53 +0200
Karyotype of three Lonchophylla species (Chiroptera, Phyllostomidae) from Southeastern Brazil https://compcytogen.pensoft.net/article/6646/ Comparative Cytogenetics 10(1): 109-115

DOI: 10.3897/CompCytogen.v10i1.6646

Authors: Brunna Almeida, Roberto Leonan Morim Novaes, Marcia Aguieiras, Renan de França Souza, Carlos Eduardo Lustosa Esbérard, Lena Geise

Abstract: Lonchophylla Thomas, 1903 is a Neotropical bat genus that comprises 12 species, with little cytogenetic information available. Here we present the description of the karyotype of three species collected in Southeastern Brazil. Lonchophylla bokermanni Sazima, Vizotto & Taddei, 1978, Lonchophylla dekeyseri Taddei, Vizotto & Sazima, 1983, and Lonchophylla peracchii Dias, Moratelli & Esberard, 2013 showed the same diploid number 2n = 28 and the same autosomal fundamental number FNa = 50, in both L. bokermanni and L. peracchii. We observed that the karyotypes were also cytogenetically similar when we compared the studied species with other species within the same genus. It is therefore not possible to differentiate the species using only karyotypes with conventional staining. However, this information increases the knowledge of the genus and can be one more important character for a better phylogenetic comprehension of this taxon.

HTML

XML

PDF

]]>
Short Communication Fri, 22 Jan 2016 12:53:55 +0200