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1.
Detecting cryptic species in sympatry and allopatry: analysis of hidden diversity in Polyommatus (Agrodiaetus) butterflies (Lepidoptera: Lycaenidae) 下载免费PDF全文
Vladimir A. Lukhtanov Alexander V. Dantchenko Maria S. Vishnevskaya Alsu F. Saifitdinova 《Biological journal of the Linnean Society. Linnean Society of London》2015,116(2):468-485
Modern multilocus molecular techniques are a powerful tool in the detection and analysis of cryptic taxa. However, its shortcoming is that with allopatric populations it reveals phylogenetic lineages, not biological species. The increasing power of coalescent multilocus analysis leads to the situation in which nearly every geographically isolated or semi‐isolated population can be identified as a lineage and therefore raised to species rank. It leads to artificial taxonomic inflation and as a consequence creates an unnecessary burden on the conservation of biodiversity. To solve this problem, we suggest combining modern lineage delimitation techniques with the biological species concept. We discuss several explicit principles on how genetic markers can be used to detect cryptic entities that have properties of biological species (i.e. of actually or potentially reproductively isolated taxa). Using these principles we rearranged the taxonomy of the butterfly species close to Polyommatus (Agrodiaetus) ripartii. The subgenus Agrodiaetus is a model system in evolutionary research, but its taxonomy is poorly elaborated because, as a rule, most of its species are morphologically poorly differentiated. The taxon P. (A.) valiabadi has been supposed to be one of the few exceptions from this rule due to its accurately distinguishable wing pattern. We discovered that in fact traditionally recognized P. valiabadi is a triplet of cryptic species, strongly differentiated by their karyotypes and mitochondrial haplotypes. 相似文献
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Paleontological Journal - Three-dimensional SEM images of the radiolarian species Williriedellum salymicum Kozlova, 1983 were obtained for the first time, from the Berriasian–Valanginian... 相似文献
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Emine Türk Öz Valentina Vishnevskaya Ludmila Kopaevich Ş. Çapkınoğlu 《Palaeoworld》2018,27(1):117-144
In the “Eastern Pontides” (NE Turkey), the intense volcanic activity accompanying carbonate-siliceous sedimentation during the Late Cretaceous period ensured the occurrence of thick volcano-sedimentary sequences. Seventy-one radiolarian species belonging to 26 genera were identified from five stratigraphic sections of the Upper Cretaceous sequences between Trabzon and Giresun areas in NE Turkey. These species were obtained from the lower Turonian–lower Coniacian strata of the Çe?meler Formation, the Coniacian–lower Santonian strata of the Elmal? Dere Formation and the upper Santonian strata of the Ça?layan Formation. Coniacian–Campanian fauna, consisting of planktonic foraminifera Hedbergella, Marginotruncana, Globotruncana, Whiteinella and biserial heterohelicids as well as radiolarians, was recovered from the red pelagic limestones of the Elmal? Dere Formation known as marker horizon. 相似文献
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Zemlyakova V. V. Zhevlova A. I. Strelnikov V. V. Lyubchenko L. N. Schabanov M. A. Vishnevskaya Ya. V. Tretyakova V. A. Zaletayev D. V. Nemtsova M. V. 《Molecular Biology》2003,37(4):591-597
Multiplex methylation-sensitive PCR was employed in studying the methylation of CpG islands in the R1, p16/CDKN2, p15/CDKN2, p14/ARF, DH1, MGMT, HIC1, and N33 promoter regions in breast cancer (105 tumors). Methylation was often observed for the two major suppressor genes involved in controlling the cell cycle through the Cdk–Rb–E2F signaling pathway, R1 (18/105, 17%) and p16 (59/105, 56%); both genes were methylated in 13 tumors. Methylation involved p15 in two (2%) tumors; CDH1, in 83 (79%) tumors; MGMT, in eight (8%) tumors, and N33, in nine (9%) tumors. The p14 promoter was not methylated in the tumors examined. 相似文献
5.
The stages of barley root colonization by Fusarium culmorum were studied in sterile vermiculite by the method of fluorescent antibodies. The influence of the antagonistic bacterium
Pseudomonas fluorescens on the process of root colonization by F. culmorum was demonstrated. In vermiculite inoculated with F. culmorum, the fungus density on the roots increased gradually. In the case of joint inoculation of vermiculite with the fungus and
the bacterium, the F. culmorum density on the roots changed abruptly. It was shown that the site of primary colonization of the roots by the fungus was
mainly the zone of root hairs. When Pseudomonas fluorescens was present on the roots, F. culmorum colonized not only root hairs, but also the elongation zone, during the first two days. Introduction of Pseudomonas fluorescens into vermiculite resulted in lower intensity of barley root rot. 相似文献
6.
Michael Lauck Sergey V. Alkhovsky Yīmíng Bào Adam L. Bailey Zinaida V. Shevtsova Alexey M. Shchetinin Tatyana V. Vishnevskaya Matthew G. Lackemeyer Elena Postnikova Steven Mazur Jiro Wada Sheli R. Radoshitzky Thomas C. Friedrich Boris A. Lapin Petr G. Deriabin Peter B. Jahrling Tony L. Goldberg David H. O'Connor Jens H. Kuhn 《Journal of virology》2015,89(15):8082-8087
Simian hemorrhagic fever (SHF) is lethal for macaques. Based on clinical presentation and serological diagnosis, all reported SHF outbreaks were thought to be caused by different strains of the same virus, simian hemorrhagic fever virus (SHFV; Arteriviridae). Here we show that the SHF outbreaks in Sukhumi in 1964 and in Alamogordo in 1989 were caused not by SHFV but by two novel divergent arteriviruses. Our results indicate that multiple divergent simian arteriviruses can cause SHF. 相似文献
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More than 20 human diseases are associated with protein misfolding, which results in the appearance of amyloids, fibrillar aggregates of normally soluble proteins. Such diseases are termed amyloid diseases, or amyloidoses. Of these, only prion diseases are transmissible. Amyloids of the prion type are known for lower eukaryotes. While mammalian prions cause neurodegenerative diseases, prions of lower eukaryotes are associated with some nonchromosomally inherited phenotypic traits. The review summarizes the results of studying the prions of yeast Saccharomyces cerevisiae and data obtained using S. cerevisiae as a model to investigate some human amyloidoses such as Alzheimer’s, Parkinson’s, Huntington’s, and prion diseases. 相似文献
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Aminina N. M. Vishnevskaya T. I. Karaulova E. P. Epur N. V. Yakush E. V. 《Russian Journal of Marine Biology》2020,46(1):34-41
Russian Journal of Marine Biology - The properties of polyphenol extracts from marine brown algae of the families Laminariaceae, Alariaceae, Arthrothamnaceae, Costariaceae, Сystoseiraceae,... 相似文献
10.
V. S. Vishnevskaya 《Doklady biological sciences》2016,466(1):12-15
The taxonomic position of the microproblematics previously considered to be Foraminifera or Calcisphaerulidae is established. The first record from Russia of calcareous cysts of Dinoflagellata is presented. The microfossils originate from the Maastrichtian siliceous clay of the Volga River Region. 相似文献