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445 results for “karyotype”
FIGURE 20 in A review on the cytogenetics of the tribe Oryzomyini (Rodentia: Cricetidae: Sigmodontinae), with the description of new karyotypes
FIGURE 20. Karyotype of Scolomys sp., male with 2n = 62 and FN = 80. (A) Conventional staining (JAP 229); (B) C-banding (JAP 229); (C) G-banding (JAP 229); (D) Metaphase plate after fluorescent in situ hybridization with telomeric probe (left) and DAPI staining (right) (JAP 229).
FIGURE 15 in A review on the cytogenetics of the tribe Oryzomyini (Rodentia: Cricetidae: Sigmodontinae), with the description of new karyotypes
FIGURE 15. Karyotype of Oecomys sp. 2, female with 2n = 64 and FN = 92. (A) Conventional staining (JAP 150) (inset: sex chromosomes of a male (JAP 96)); (B) C-banding (JAP 150) (inset: sex chromosomes of a male (JAP 96)); (C) G-banding (JAP 150); (D) Metaphase plate after fluorescent in situ hybridization with telomeric probe (left) and DAPI staining (right) (JAP 150), arrows indicate the hybridization of interstitial telomeric sequence.
FIGURE 1 in A review on the cytogenetics of the tribe Oryzomyini (Rodentia: Cricetidae: Sigmodontinae), with the description of new karyotypes
FIGURE 1. Collection localities of Oryzomyini species analyzed in this work. (1) Claúdia, Mato Grosso state; (2) and (3) Rio Japurá, Amazonas state; (4) and (5) Rio Içá, Amazonas state.
FIGURE 23 in A review on the cytogenetics of the tribe Oryzomyini (Rodentia: Cricetidae: Sigmodontinae), with the description of new karyotypes
FIGURE 23. Distribution of diploid and fundamental number of karyotyped species of tribe Oryzomyini.
FIGURE 17 in A review on the cytogenetics of the tribe Oryzomyini (Rodentia: Cricetidae: Sigmodontinae), with the description of new karyotypes
FIGURE 17. Distribution of diploid and fundamental number of karyotyped specimens of genus Oligoryzomys. (r) O. mattogrossae; (■) O. microtis; (○) O. moojeni; (☆) O. rupestris; (▲) O. stramineus; (l) O. utiaritensis.
FIGURE 119. Karyotype S. piceiventris, 2 in Generic relationships of New World Jerusalem crickets (Orthoptera: Stenopelmatoidea:Stenopelmatinae), including all known species of Stenopelmatus
FIGURE 119. Karyotype S. piceiventris, 2nƋ= 27, with 6 pairs metacentric autosomes, 7 pairs rod shaped autosomes, and metacentric X. Top photo, individual T16-1. Bottom photo, individual T16-2.
Data from: Chromosomal rearrangements do not seem to affect the gene flow in hybrid zones between karyotypic races of the common shrew (Sorex araneus)
Chromosomal rearrangements are proposed to promote genetic differentiation between chromosomally differentiated taxa and therefore promote speciation. Due to their remarkable karyotypic polymorphism, the shrews of the Sorex araneus group were used to investigate the impact of chromosomal rearrangements on gene flow. Five intraspecific chromosomal hybrid zones characterized by different levels of karyotypic complexity were studied using 16 microsatellites markers. We observed low levels of genetic differentiation even in the hybrid zones with the highest karyotypic complexity. No evidence of restricted gene flow between differently rearranged chromosomes was observed. Contrary to what was observed at the interspecific level, the effect of chromosomal rearrangements on gene flow was undetectable within the S. araneus species.
Data from: Karyotype analysis of four jewel-beetle species (Coleoptera, Buprestidae) detected by standard staining, C-banding, AgNOR-banding and CMA3/DAPI staining
The male karyotypes of Acmaeodera pilosellae persica Mannerheim, 1837 with 2n=20 (18+neoXY), Sphenoptera scovitzii Faldermann, 1835 (2n=38–46), Dicerca aenea validiuscula Semenov, 1895 – 2n=20 (18+Xyp) and Sphaerobothris aghababiani Volkovitsh et Kalashian, 1998 – 2n=16 (14+Xyp) were studied using conventional staining and different chromosome banding techniques: C-banding, AgNOR-banding, as well as fluorochrome Chromomycin A3 (CMA3) and DAPI. It is shown that C-positive segments are weakly visible in all four species which indicates a small amount of constitutive heterochromatin (CH). There were no signals after DAPI staining and some positive signals were discovered using CMA3 staining demonstrating absence of AT-rich DNA and presence of GC-rich clusters of CH. Nucleolus organizing regions (NORs) were revealed using Ag-NOR technique; argentophilic material mostly coincides with positive signals obtained using CMA3 staining.
Data from: Analysis of the karyotype structure in Ricolla quadrispinosa (Linneus, 1767): inferences about the chromosomal evolution of the tribes of Harpactorinae (Heteroptera, Reduviidae)
The subfamily Harpactorinae is composed of six tribes. Phylogenetic studies bring together some of Harpactorinae tribes, but by and large the data on evolutionary relationships of the subfamily are scarce. Chromosome studies are of great importance for understanding the systematics of different groups of insects. For Harpactorinae, these studies are restricted to some subfamilies and involved only conventional chromosome analysis. This work analyzed cytogenetically Ricolla quadrispinosa (Linneus, 1767). The chromosome number was determined as 2n = 24 + X1X2Y in males. In metaphase II the autosomal chromosomes were organized in a ring with the pseudo-trivalent of sex chromosomes in its center. After C-banding followed by staining with DAPI, AT-rich blocks in autosomes were observed and the negatively heteropycnotic sex chromosomes. The data obtained, together with existing data for other species of the group, indicated that different chromosomal rearrangements are involved in the evolution of the species. In addition, a proposal of karyotype evolution for the subfamily, based on existing phylogenetic studies for the group is presented.
FIGURE 6. Karyotypes with 2n in A new species of the genus Alsodes (Anura: Neobatrachia) from the Nothofagus forest, Coastal Range, Southern Chile, identified by its karyotype
FIGURE 6. Karyotypes with 2n = 26 (A) Alsodes valdiviensis with comparative purposes. Reformed from that of (B) Alsodes norae (2n = 30), and (C) A. barrioi (2n = 34) by means of hypothetic mechanisms of chromosome evolution in some Alsodes species. In B and C small numbers beside some chromosomes indicate the original chromosome position procedence.
FIGURE 1 in A new species of the genus Alsodes (Anura: Neobatrachia) from the Nothofagus forest, Coastal Range, Southern Chile, identified by its karyotype
FIGURE 1. Map of Central-South of Chile showing the type locality of Alsodes norae (frame), and the fragmented distribution of the other Alsodes species from the Coastal Range.
FIGURE 5. C in A new species of the genus Alsodes (Anura: Neobatrachia) from the Nothofagus forest, Coastal Range, Southern Chile, identified by its karyotype
FIGURE 5. C-bands ideograms of the five Alsodes species from the Coastal Range of Chile (A) A. valdiviensis, (B) A. norae, (C) A. vanzolinii, (D) A. barrioi, (E) A. nodosus.
FIGURE 3 in A new species of the genus Alsodes (Anura: Neobatrachia) from the Nothofagus forest, Coastal Range, Southern Chile, identified by its karyotype
FIGURE 3. Morphological details of the male holotype IZUA 3541 of Alsodes norae. Left hand (A) palmar attributes, (B) nuptial asperities. Left foot (C) plantar surfaces. Chest (D) ventral view with nuptial pad. Pectoral girdle (E) arciferal. Bars equal 5 mm.
FIGURE 4 in A new species of the genus Alsodes (Anura: Neobatrachia) from the Nothofagus forest, Coastal Range, Southern Chile, identified by its karyotype
FIGURE 4. Chromosomes of Alsodes norae (A) Standard karyotypes, (B) C-banded karyotype, (C) secondary constriction and (D) nucleolus organizer region position.
FIGURE 9 in Dorcadion axillare Küster, 1847 (Coleoptera, Cerambycidae): distribution, morphometrics, karyotype and description of a new subspecies from Romania
FIGURE 9. Distribution of Dorcadion axillare. (VD) 'Valea lui David', (Mz) Mârzeşti, (Ch) Chirceşti, (Mc) Mäcin, (Bb) Babadag, (It) Istria, (Mg) Mangalia, (Hg) Hagieni, (Ot) Oltina, (EB) Esechioi and Bugeac, (VB) Valea Beiului. Black rectangles: D. a. moldavicum, black dots: D. a. axillare. The distribution in Bulgaria is based on the locality data published by Kantardjieva-Minkova (1934) and Minkova (1961), and on specimens in first author's collection and public collections.
FIGURE 5 in Dorcadion axillare Küster, 1847 (Coleoptera, Cerambycidae): distribution, morphometrics, karyotype and description of a new subspecies from Romania
FIGURE 5. Endophallus. (a) Dorcadion arenarium, Croatia, Krk Island and (b) Italy, Ripalda, (c) D. a. axillare, Bulgaria, Stara Zagora, (d) D. a. moldavicum, Romania, 'Valea lui David' and (e) Chirceşti. Aedeagus. D. a. moldavicum: (f) median lobe, (g) parameres. Pronotum. (h) D. a. moldavicum, male and (i) female, (j, k) D. a. axillare, males and (l) female. Abbreviations. (bt) basal tube, (mt) medial tube, (ct) central trunk, (cb) central chamber with (vs) ventral swelling and (vp) ventral plates.
FIGURE 6 in Dorcadion axillare Küster, 1847 (Coleoptera, Cerambycidae): distribution, morphometrics, karyotype and description of a new subspecies from Romania
FIGURE 6. Habitus. (a) Dorcadion a. axillare, male and (b, c) females from Stara Zagora, (d) D. a. moldavicum, male and (e, f) females from Chirceşti, (g) D. a. moldavicum, male and (h) female from 'Valea lui David'. Endophalus. (i) D. a. axillare, (j) D. a. moldavicum. Arrow points to the small spine on the ventral side of the median tube.
FIGURE 8 in Dorcadion axillare Küster, 1847 (Coleoptera, Cerambycidae): distribution, morphometrics, karyotype and description of a new subspecies from Romania
FIGURE 8. Ideogram of the haploid karyotype of Dorcadion a. moldavicum. Chirceşti (dark chromosomes), 'Valea lui David' (grey chromosomes). Arrows show significant differences.
FIGURE 3 in Dorcadion axillare Küster, 1847 (Coleoptera, Cerambycidae): distribution, morphometrics, karyotype and description of a new subspecies from Romania
FIGURE 3. Relationship between pronotum length (pL) and pronotum base width (pbW) in Dorcadion a. axillare and D. a. moldavicum ssp. n.
FIGURE 7 in Dorcadion axillare Küster, 1847 (Coleoptera, Cerambycidae): distribution, morphometrics, karyotype and description of a new subspecies from Romania
FIGURE 7. Chromosomes of Dorcadion a. moldavicum. (a) female, Chirceşti, (b, c) females, 'Valea lui David', (d) male, 'Valea lui David', (e) prophase I, male, Chirceşti, and (f) 'Valea lui David'. (a, b, d, e, f) conventional staining, (c) C banding. Arrows point to the sex bivalent.
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Allen Brain Atlas
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