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EN
Karyotypes and C-banding patterns of four species belonging to three genera of the subfamily Phaneropterinae were studied. The basic karyotype of Isophya kalishevskii, Polysarcus zacharovi, and Poecilimon ukrainicus consists of 2n=31(XO) in the male. The chromosome number of Isophya hemiptera is 2n%=28+neo-X+neo-Y as a result of mutual tandem translocation between the originally acrocentric X-chromosome and acrocentric medium size autosome. Analysis of the meiotic behaviour of the neo-X and neo-Y demonstrated a post-reductional division of these chromosomes.
EN
The randomamplified polymorphicDNA(RAPD-PCR)methodwas used to study the genetic polymorphism of 20 species of the genus Isophya. Each primer amplified a different set of DNA fragments, all oligonucleotides failed to generate any specific diagnostic band that could lead to the identification of Isophya species, and none of the amplified fragments were present in all species. RAPD markers detected a high level of polymorphism in all species. The data were in most cases not congruent with morphological subdivision to the species group and cytotaxonomic studies. The genetic lin with relationships proposed by systematists.
EN
Karyotypes and C-heterochromatin distribution of Deracanthina deracanthoides, Deracanthella verrucosa and Zichya baranovi were studied. Differences in the chromosome numbers, their morphology, and the position of C-bands between species of Bradyporinae are discussed.
EN
So far, only about 400 species, subspecies, and chromosome races of 15 subfamilies of Tettigoniidae have been studied karyologically, this constituting about 7% of all described species in this group. An attempt was made to establish the basic diploid chromosome numbers of Tettigoniidae and, considering chromosome number, morphology, and the sex determining mechanisms, to suggest how karyotype evolution in the particular subfamilies could have occurred.
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tom 50
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nr 1-2
23-28
EN
Tettigonia ussuriana and T. dolichopoda maritima differ in the length of tegmina, details in venation, and in females in details of the subgenital plate. The two species of the genus Tettigonia have the same number and morphology of autosomes but a different morphology of the X chromosome: in T. ussuriana it is metacentric, whereas in T. dolichopoda maritima acrocentric. In both species, euchromatic zones and breaks of one or to chromatids during meiosis and mitosis in theXchromosome were observed. Additionally, B chromosomes were noted in most individuals of both species.
EN
Chromosome numbers and C-banding patterns in the spermatogenesis of seven species of Pamphagidae grasshoppers from the Caucasus, Central Asia, and Trabsbaikalia region of Russia are reported. The patterns of origin and evolution of the neo-XY/neo-XX sex determination in Pamphagidae are discussed.
EN
The karyotype of Apteranabropsis tonkinensis, described for the first time, is characterized by 2n_= 19 (XO) and 2n_=20 (XX). Successive stage of spermatogenesis were analysed.
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tom 44
15-25
EN
The results of comparative karyotypical studies of the Caelifera orthopteran insects from Russia, Kazakhstan, Central, Asia and the Caucasus are summarized. Chromosome complements for 166 species belonging to the families: Eumastacidae (subfamily Gomphomastacinae; 2n male=19,21), Tetrigidae (2n male=13), Acrididae (2n male=23, 22, 21, 19, 17, 16), Pyrgomorphidae (2n male=19), and Pamphagidae (2n male=19,18) are presented.
EN
The genus Isophya represents one of the largest orthopteran genera with about 45 species occurring in Europe. All over its range the genus includes groups of sibling species, the recognition of which is hampered by their morphological similarity. In part, some species were grouped according to their morphology: the Isophya straubei-group, the I. amplipennis-group and the I. major-group. Nevertheless,many species have not been studied using newmethods. This is particularly true for 15 taxa described from the Balkans, more or less resembling I. modesta, known mostly from old, unsatisfactorily informative descriptions. Chromosomal analysis of 25 species/subspecies of the genus Isophya showed the karyotypic evolution among species. The karyotype of 18 species/subspecies was investigated for the first time. The most remarkable changes in the sex chromosomes were the ancient acrocentric X chromosome inversions in 19 species and an X chromosome/autosome mutual tandem translocation, from which the sex determination system neo-XY originated in I. hemiptera. Karyotype differentiation has been less rapid in autosomes than in sex chromosomes, in this case interspecific autosomal differentiation has involved the distribution and quantity of C-heterochromatin as well as the number of NORs. Cytogenetic analysis revealed some changes reflecting the level of genomic organization,andtheresultssuggestsomeassociationofrelatedtaxafrombiogeographicregions.
EN
Seven categories of B chromosomes found in the brachypterus grasshopper Podisma sapporensis from Hokkaido populations differ in structure, size, and C-band content. The interchange between B and one autosome from M3 and sporadically M7 was observed in most of the populations examined. Such an interaction between standard and non-standard chromosomal set provides an insight into the integration of supernumerary chromosome. In addition, C-heterochromatin polymorphism was also identified in male karyotypes in some populations. These facts indicate P. sapporensis is a highly polymorphic species from the cytogenetic point of view.
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