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Wyświetlanie 1-10 z 55
Tytuł:
Psammophaga fuegia sp. nov., a New Monothalamid Foraminifera from the Beagle Channel, South America
Autorzy:
Gschwend, Florian
Majda, Aneta
Majewski, Wojciech
Pawlowski, Jan
Tematy:
Foraminifera, Monothalamea, taxonomy, molecular phylogeny, eDNA
Pokaż więcej
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Powiązania:
https://bibliotekanauki.pl/articles/763595.pdf  Link otwiera się w nowym oknie
Opis:
Psammophaga fuegiais a new monothalamid foraminifera discovered in surface sediment samples in the Beagle Channel, South America. The species is a member of the important, globally distributed genus Psammophaga, which has the ability to ingest and store mineral particles inside the cytoplasm. Its shape is ovoid to pyriform, the size varies from 250 to 600 µm in length and from 200 to 400 µm in width. Like other Psammophaga species P. fuegia has a single aperture. It was found in multiple samples across the Beagle Channel area at water depths of 4 to 220 meters and in environments as variable as fjords, the main channel, and the harbour of Puerto Williams (Chile). The occurrences of the new species in environmental DNA and RNA samples correspond well to its distribution inferred from the microscopic study.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low-level genetic diversity of opalinid morphotypes from the digestive tract of Hoplobatrachus rugulosus (Batrachia, Amphibia) in Thailand
Autorzy:
Gentekaki, Eleni
Chantangsi, Chitchai
Tematy:
endocommensal
molecular phylogeny
protist
Slopalinida
Thailand
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Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Powiązania:
https://bibliotekanauki.pl/articles/52399191.pdf  Link otwiera się w nowym oknie
Opis:
Opaline is an unusual group of protists, characterized by the presence of flagella covering their whole body. They reside in the intestinal tracts of various animals, most notably amphibians. While there is a wealth of data regarding the morphological features of opalines, molecular data are extremely sparse. Consequently, the extent of diversity of this understudied group remains unknown. Here, we examine opalines from the intestinal tract of the amphibian Hoplobatrachus rugulosus in Thailand. We provide micrographs obtained from light and scanning electron microscopy of various opalinid morphotypes. Furthermore, we enrich the database of opaline sequences by providing new molecular data of the small subunit ribosomal DNA gene of these species. In our phylogenetic analyses, the newly derived sequences form a cluster sister to Protoopalina.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New discoveries of the genus Thuricola Kent, 1881 (Ciliophora, Peritrichia, Vaginicolidae), with descriptions of three poorly known species from China
Autorzy:
Lu, Borong
Ji, Daode
Sheng, Yalan
Song, Weibo
Hu, Xiaozhong
Chen, Xiangrui
Al-Rasheid, Khaled A. S.
Tematy:
Ciliate
Loricate sessilids
Molecular phylogeny
Morphology
Silverline
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Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Powiązania:
https://bibliotekanauki.pl/articles/52256575.pdf  Link otwiera się w nowym oknie
Opis:
Members of the genus Thuricola are a highly specialized group of peritrichous ciliates possessing a protective barrel-shaped lorica. The genus presents many difficulties in terms of species separation and definition, and in this context the present study investigates three species by protargol staining and analyses of SSU rDNA sequences. Based on their morphologic characteristics and biotope, they were identified as three poorly known forms in Thuricola, namely T. obconica Kahl, 1933, T. kellicottiana (Stokes, 1887) Kahl 1935 and T. folliculata Kent, 1881, respectively. T. obconica is characterized by possessing curved lorica and a single valve in vivo. T. kellicottiana is distinguished by two valves with a spine on the main valve, and a generally long internal stalk upon which the zooids sit. T. folliculata also has two valves but lacks a spine. The ciliature of the three species are basically similar. The main features are characterized as follows: infundibular polykineties 1–3 (P1–3) are relatively long and composed of three rows each; P1 bends twice and comprises three equally long rows; P2 ends near the second bend of P1 with all rows exhibiting a staggered arrangement; P3 converges with P1 at adstomal end, its row 1 at least twice as long as the other two rows; epistomial membranes 1 and 2 are present. Silverline system in Vorticella-pattern. Phylogenetic analyses indicate that the three ciliates in this study cluster together within one of the two major sub-clades within the Vaginicolidae. 
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
MOLECULAR DIVERSITY AND PHYLOGENY OF TRITICUM-AEGILOPS SPECIES POSSESSING D GENOME REVEALED BY SSR AND ISSR MARKERS
Autorzy:
Moradkhani, Hoda
Mehrabi, Ali Ashraf
Etminan, Alireza
Pour-Aboughadareh, Alireza
Tematy:
Aegilops
genetic diversity
ISSR
molecular phylogeny
Triticum
SSR
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Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Powiązania:
https://bibliotekanauki.pl/articles/2199633.pdf  Link otwiera się w nowym oknie
Opis:
The aim of this study is investigation the applicability of SSR and ISSR markers in evaluating the genetic relationships in twenty accessions of Aegilops and Triticum species with D genome in different ploidy levels. Totally, 119 bands and 46 alleles were detected using ten primers for ISSR and SSR markers, respectively. Polymorphism Information Content values for all primers ranged from 0.345 to 0.375 with an average of 0.367 for SSR, and varied from 0.29 to 0.44 with the average 0.37 for ISSR marker. Analysis of molecular variance (AMOVA) revealed that 81% (ISSR) and 84% (SSR) of variability was partitioned among individu-als within populations. Comparing the genetic diversity of Aegilops and Triticum accessions, based on genetic parameters, shows that genetic variation of Ae. crassa and Ae. tauschii species are higher than other species, especially in terms of Nei’s gene diversity. Cluster analysis, based on both markers, separated total accessions in three groups. However, classification based on SSR marker data was not conformed to classification ac-cording to ISSR marker data. Principal co-ordinate analysis (PCoA) for SSR and ISSR data showed that, the first two components clarified 53.48% and 49.91% of the total variation, respectively. This analysis (PCoA), also, indicated consistent patterns of genetic relationships for ISSR data sets, however, the grouping of acces-sions was not completely accorded to their own geographical origins. Consequently, a high level of genetic diversity was revealed from the accessions sampled from different eco-geographical regions of Iran.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
MOLECULAR DIVERSITY AND PHYLOGENY OF TRITICUM-AEGILOPS SPECIES POSSESSING D GENOME REVEALED BY SSR AND ISSR MARKERS
Autorzy:
Moradkhani, Hoda
Mehrabi, Ali Ashraf
Etminan, Alireza
Pour-Aboughadareh, Alireza
Tematy:
Aegilops
genetic diversity
ISSR
molecular phylogeny
Triticum
SSR
Pokaż więcej
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Powiązania:
https://bibliotekanauki.pl/articles/55928227.pdf  Link otwiera się w nowym oknie
Opis:
The aim of this study is investigation the applicability of SSR and ISSR markers in evaluating the genetic relationships in twenty accessions of Aegilops and Triticum species with D genome in different ploidy levels. Totally, 119 bands and 46 alleles were detected using ten primers for ISSR and SSR markers, respectively. Polymorphism Information Content values for all primers ranged from 0.345 to 0.375 with an average of 0.367 for SSR, and varied from 0.29 to 0.44 with the average 0.37 for ISSR marker. Analysis of molecular variance (AMOVA) revealed that 81% (ISSR) and 84% (SSR) of variability was partitioned among individu-als within populations. Comparing the genetic diversity of Aegilops and Triticum accessions, based on genetic parameters, shows that genetic variation of Ae. crassa and Ae. tauschii species are higher than other species, especially in terms of Nei’s gene diversity. Cluster analysis, based on both markers, separated total accessions in three groups. However, classification based on SSR marker data was not conformed to classification ac-cording to ISSR marker data. Principal co-ordinate analysis (PCoA) for SSR and ISSR data showed that, the first two components clarified 53.48% and 49.91% of the total variation, respectively. This analysis (PCoA), also, indicated consistent patterns of genetic relationships for ISSR data sets, however, the grouping of acces-sions was not completely accorded to their own geographical origins. Consequently, a high level of genetic diversity was revealed from the accessions sampled from different eco-geographical regions of Iran.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Molecular phylogeny of Populus (Salicaceae, Salicales) with focus on inter- and intrasectional relationships
Autorzy:
Du, S.
Hu, X.
Yang, Y.
Wang, Z.
Tematy:
molecular phylogeny
section Populus
section Tacamahaca
section Aigeiros
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Powiązania:
https://bibliotekanauki.pl/articles/2130215.pdf  Link otwiera się w nowym oknie
Opis:
The relationships among sections and species within each section in the genus Populus have attracted much attention from taxonomists and biologists. In this paper, we provide an overview of the current state of Populus phylogenetics and discuss the origin of some hybrid species. There has been some controversy surrounding the origin of the genus Populus in North America and subsequent dispersal and differentiation in other parts of the world. We present the most plausible scenario based on phylogenetic analysis and fossil records. Sections Abaso, Turanga and Populus are all monophyletic, whereas sections Aigeiros, Tacamahaca and Leucoidesshow some degree of polyphyly. Sections Abaso and Turanga are relatively primitive lineages in Populus. With the accumulation of sequencing data and new analytical tools, it will be possible to investigate more complicated issues concerning genus Populus within a phylogenetic framework.
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 55

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