Електронна бібліотека Житомирського державного університету: Ніяких умов. Результати впорядковані-Дата внесення. 2024-03-28T15:20:46ZEPrintshttp://eprints.zu.edu.ua/images/logo2.gifhttp://eprints.zu.edu.ua/2014-12-16T18:12:35Z2016-03-07T01:01:31Zhttp://eprints.zu.edu.ua/id/eprint/6270Цей елемент знаходиться в архіві з URL: http://eprints.zu.edu.ua/id/eprint/62702014-12-16T18:12:35ZKaryotypes of two European species of the genus Lymnaea
with disputable taxonomic status (Gastropoda: Pulmonata: Lymnaeidae)Karyotypes of Lymnaea corvus and L. occulta are studied for the first time and
compared to the original data on Ukrainian populations of L. palustris and L. stagnalis. While
all the studied species have the same diploid chromosome number (2n = 36), they differ in
chromosome morphology. Karyotypes of L. occulta and L. palustris include only biarmed
chromosomes (number of arms = 72). In contrast, L. corvus and L. stagnalis have also
uniarmed (acrocentric) chromosomes (number of arms = 60 and 62, respectively).
Karyological data confirm specific distinctness of L. occulta and L. corvus; however, similarity
in the chromosome morphology of the latter species to L. stagnalis is probably based on
symplesiomorphies and, thus, cannot support phylogenetic relationship suggested earlier
on the basis of anatomical characters.А. V. GarbarА. V. Kornіushіn2013-09-25T06:17:01Z2016-03-07T01:01:59Zhttp://eprints.zu.edu.ua/id/eprint/9685Цей елемент знаходиться в архіві з URL: http://eprints.zu.edu.ua/id/eprint/96852013-09-25T06:17:01ZFeatures of the Genetic Structure of the Earthworms
Aporrectodea (Superspecies) Caliginosa (Oligochaeta:
Lumbricidae) Complex in UkraineAn investigation of the genetic structure of the Aporrectodea caliginosa – A. trapezoids diploidpolyploid complex of earthworms found in the Ukraine is performed by means of biochemical genetic marking
with respect to six loci (Aat, Es-1, -2, -3, and -4, and Mdh) and karyotyping. All 646 individuals from 21 samples are analyzed at the biochemical gene level and karyotype samples are obtained from 70 specimens. As a
result, diploid amphimictic A. caliginosa individuals (2n = 36), which form panmictic populations, and triploid
(2n = 54) A. trapezoides individuals, represented by 19 hypothetical clones discovered in the course of an analysis of 157 specimens, are clearly differentiated. A clear trend towards dominance of the triploid forms in the
steppe zone of Ukraine is discovered. Here they represent roughly 70% as against 12% of all A. (superspecies)
caliginosa individuals in the northern forest regions. Based on the stated nature of the heterozygosity of the loci
studied and the behavior of the chromosomes in meiosis, it may be claimed that the cloned forms are allotriploids, formed as a result of hybridization of a series of related forms, which, judging from the allelic pools, does
not include amphimictic species that now inhabit the territory of Ukraine. That is, either the apomictic clones
of A. trapezoides lack a local origin and their appearance among the fauna of Ukraine is a consequence of settlement in arid steppe regions that are unfavorable for earthworms or, on the other hand, amphimictic A. caliginosa is an invasive species.S. V. MezhzherіnR. Р. VlasenкoА. V. Garbar2013-09-25T06:14:33Z2016-03-07T01:01:59Zhttp://eprints.zu.edu.ua/id/eprint/9688Цей елемент знаходиться в архіві з URL: http://eprints.zu.edu.ua/id/eprint/96882013-09-25T06:14:33ZKaryotypes of two European species of the genus Lymnaea
with disputable taxonomic status (Gastropoda: Pulmonata: Lymnaeidae)Karyotypes of Lymnaea corvus and L. occulta are studied for the first time and
compared to the original data on Ukrainian populations of L. palustris and L. stagnalis. While
all the studied species have the same diploid chromosome number (2n = 36), they differ in
chromosome morphology. Karyotypes of L. occulta and L. palustris include only biarmed
chromosomes (number of arms = 72). In contrast, L. corvus and L. stagnalis have also
uniarmed (acrocentric) chromosomes (number of arms = 60 and 62, respectively).
Karyological data confirm specific distinctness of L. occulta and L. corvus; however, similarity
in the chromosome morphology of the latter species to L. stagnalis is probably based on
symplesiomorphies and, thus, cannot support phylogenetic relationship suggested earlier
on the basis of anatomical characters.
Kurzfassung. Karyotypen von zwei europдischen Arten der Gattung Lymnaea mit
umstrittenem taxonomischen Status (Gastropoda: Pulmonata: Lymnaeidae). -
Karyotypen von Lymnaea corvus und L. occulta wurden erstmalig untersucht und mit den
originalen Daten fьr ukrainische Populationen von L. stagnalis und L. palustris verglichen.
Alle untersuchten vier Arten weisen dieselbe Anzahl diploider Chromosomen auf (2n =
36), kцnnen aber durch die Morphologie der Chromosomen unterschieden werden. Die
Karyotypen von L. occulta enthalten nur zweiarmige Chromosomen (Anzahl der Arme =
72). Im Gegensatz hierzu weisen L. corvus und L. stagnalis auch einarmige (akrozentrische)
Chromosomen auf (Anzahl der Arme = 60 beziehungsweise 62). Die karyologischen
Befunde bestдtigen die spezifische Verschiedenheit von L. occulta und L. corvus; jedoch ist
die Дhnlichkeit in der Chromosomenmorphologie der letzteren Art gegenьber L. stagnalis
wahrscheinlich auf Symplesiomorphien zurьckzufьhren, deshalb kann die frьher auf der
Basis anatomischer Merkmale behauptete phylogenetische Verwandtschaft von L. corvus
und L. stagnalis nicht unterstьtzt werden.А. V. GarbarА. V. Kornіushіn2013-09-25T06:05:10Z2015-08-15T04:22:01Zhttp://eprints.zu.edu.ua/id/eprint/9696Цей елемент знаходиться в архіві з URL: http://eprints.zu.edu.ua/id/eprint/96962013-09-25T06:05:10ZKaryotypes of european species of radix (Gastropoda: Pulmonata: Lymnaeidae) and their relevance to species distinction in the genusKaryotypes of Radix auricularia (Linnaeus, 1758) and three disputable taxa considered by
different authors as distinct species or assigned as forms of Radix peregra (Muller, 1774),
sensu lato - R. labiata (Rossmassler, 1835), R. balthica (Linnaeus, 1758), and R. ampla
(Hartmann, 1821) - were studied with preparations obtained from gonad tissues by the airdrying
method. The studied taxa have the same diploid number (2n = 34), but are characterized
by different morphology of some chromosome pairs. In particular, R. labiata (traditionally
identified as R. peregra, s. s.) and R. balthica (= R. ovata in traditional understanding) differ
in the number of subtelocentric chromosomes (1 and 5, respectively), species status of
these taxa being also supported by pronounced differences in centomeric indexes of chromosome
pairs 4 and 16. Species distinctness of R. ampla is supported by differences in
three chromosome pairs, and karyological similarity between this taxon and R. balthica is
also noted. FN values varied among the studied taxa from 56 in R. ampla to 66 in R. labiata.
The known karyological characters are traced on phylogenetic trees suggested by recent
molecular reconstructions. This study demonstrates that karyology can be an effective tool
for aiding taxonomic distinctions of historically problematic groups of molluscs.А. V. GarbarА. V. Komіushіn2013-09-25T06:00:26Z2015-08-15T04:22:40Zhttp://eprints.zu.edu.ua/id/eprint/9701Цей елемент знаходиться в архіві з URL: http://eprints.zu.edu.ua/id/eprint/97012013-09-25T06:00:26ZPolyploid races, genetic structure and morphological features of the earthworm Octodrіlus transpadanus (Rosa, 1884)
(Oligohaeta: Lumbricidae) in the UkraineKariological investigation of the earthworm Octodrilus transpada-nus
(Rosa, 1884) in the Ukraine showed that this species is represented by at least three
races of different ploidy with the basic chromosome number n=15. Strict geographic
heterogeneity of electrophoretic spectra of different populations was registered:
south-eastern populations (7n=105) are characterized by a clonal structure, whereas
western (from 3n = 45 to 4n = 60) and south-western (2n=30) ones have a high level
of polymorphism. The Crimea sample (4n=60) is well isolated, has no clonal
structure and is characterized by a series of specifi c alleles , which are absent in
forms from continental Ukraine. All the forms turned out to be wellА. V. GarbarІ. Р. OnyschuкS. V. Mezhzherіn2013-09-25T05:57:02Z2015-08-15T04:22:49Zhttp://eprints.zu.edu.ua/id/eprint/9703Цей елемент знаходиться в архіві з URL: http://eprints.zu.edu.ua/id/eprint/97032013-09-25T05:57:02ZPolyploid races, genetic structure and morphological
features of earthworm Aporrectodea rosea (Savigny, 1826) (Oligohaeta: Lumbricidae) in UkraineFour chromosomal races (2n=36, 3n=54, 6n=108, 8n=144) and 96 clones have been revealed among 224
specimens of the earthworm A. rosea over the territory of Ukraine by means of karyological analysis and
biochemical genetic marking. Each population has been showed by several clones at least; moreover the
clones from different places have never been identical. The clones in the range of one population can be
identified with the set of quantitative and qualitative parameters.R. Р. VlasenкoS. V. MezhzherіnА. V. GarbarYu. Kotsuba2012-02-02T08:51:00Z2016-03-02T08:00:31Zhttp://eprints.zu.edu.ua/id/eprint/6314Цей елемент знаходиться в архіві з URL: http://eprints.zu.edu.ua/id/eprint/63142012-02-02T08:51:00ZKaryological Features of the Genus Planorbarius (Gastropoda, Pulmonata, Bulinidae) of the Ukranian FaunaThe absence of significant distinctions between the species of the genus Planorbarius in the narrow sense (P. corneus, P. banaticus, P. purpura, and P. grandis) has been established. All investigated species had identical chromosomal formulas (2n= 30 m + 6 sm = 36) and fundamental numbers (FN = 72). Reproducible distinctions between them were not found by total complement length (TCL), relative length of chromosomes (RL), and centromeric indexes. The species selected on the basis of genetic marking differed clearly by centromeric index of chromosome 12, which confirms the allospecies frame of P.corneus s. lato.Д. А. ГарбарА. V. Garbar