Article
Biology
Mariannah Pravatti Barcellos de Oliveira, Rafael Kretschmer, Geize Aparecida Deon, Gustavo Akira Toma, Tariq Ezaz, Caio Augusto Gomes Goes, Fabio Porto-Foresti, Thomas Liehr, Ricardo Utsunomia, Marcelo de Bello Cioffi
Summary: In this study, the dynamics of satellite DNAs (SatDNAs) accumulation and elimination during W chromosome differentiation in Triportheus fish were investigated. The majority of repetitive sequences were eliminated as speciation occurred in five additional Triportheus species. While the W chromosomes continued to degenerate, the Z chromosomes in some species began to accumulate TauSatDNAs. Species-specific SatDNAs were likely amplified in the heterochromatic regions of both Z and W chromosomes in each species. Thus, the W chromosomes of various Triportheus species underwent significant evolutionary changes within a short period of time (15-25 Myr) after divergence.
Article
Genetics & Heredity
Caio Augusto Gomes Goes, Natalia dos Santos, Pedro Henrique de Mira Rodrigues, Jose Henrique Forte Stornioli, Amanda Bueno da Silva, Rodrigo Zeni dos Santos, Jhon Alex Dziechciarz Vidal, Duilio Mazzoni Zerbinato de Andrade Silva, Roberto Ferreira Artoni, Fausto Foresti, Diogo Teruo Hashimoto, Fabio Porto-Foresti, Ricardo Utsunomia
Summary: Satellite DNAs (satDNAs) are repeated sequences located on heterochromatin and evolve by concerted evolution. In this study, two satellitomes of Characiformes fish were characterized, showing conservation between species despite divergence 30 million years ago. The results suggest that long-life cycles and few genomic changes may slow down satDNA differentiation rates.
Article
Cell Biology
Rafael Kretschmer, Marcelo Santos de Souza, Ivanete de Oliveira Furo, Michael N. Romanov, Ricardo Jose Gunski, Analia del Valle Garnero, Thales Renato Ochotorena de Freitas, Edivaldo Herculano Correa de Oliveira, Rebecca E. O'Connor, Darren K. Griffin
Summary: Interchromosomal rearrangements involving microchromosomes are rare in birds, predominantly found in certain orders. Our study on microchromosomes in different bird orders revealed conservation of ancestral microchromosomal syntenies in some species, while others showed chromosome reorganization.
Article
Biochemistry & Molecular Biology
Magdalena Senderowicz, Teresa Nowak, Hanna Weiss-Schneeweiss, Laszlo Papp, Bozena Kolano
Summary: This study investigated the chromosome evolution of Crepis plants by analyzing the chromosome base number and organization of rDNA loci in 39 species. The results showed that despite variations in rDNA loci organization, most species had rDNA loci on the same chromosome arm. Comparative analysis revealed multiple independent gains of rDNA loci and repositioning during diversification and speciation. These findings provide important insights into the evolutionary mechanisms and speciation of Crepis plants.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Plant Sciences
Anton Stepanenko, Guimin Chen, Phuong T. N. Hoang, Joerg Fuchs, Ingo Schubert, Nikolai Borisjuk
Summary: This study comprehensively characterized the chromosomal locations and molecular organization of 35S and 5S rDNA genes in water lettuce using karyological and molecular methods. Single locations for the 35S and 5S rDNA loci were identified using fluorescence in situ hybridization. The molecular cloning and nucleotide sequencing of 35S rDNA revealed typical structural characteristics and allowed for phylogenetic analysis. The 5S rDNA locus showed variation in nucleotide composition and subrepeat number, confirming the mosaic composition of the gene locus.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Cell Biology
Igor C. C. Amorim, Rafaelle G. C. Costa, Liliane L. L. Mota, Crislaine Xavier, Gabriel L. L. Wallau, Rita C. C. Moura
Summary: PCR and sequencing analysis revealed the presence of DsPogo_8 and DsTc1_5 transposable elements in four species of Dichotomius. The nucleotide similarity of DsTc1_5 was higher than that of the 28S and 16S rRNA genes, indicating possible horizontal transfer. Chromosomal mapping showed wide variation in the localization pattern of DsTc1_5 and DsPogo_8, suggesting their contribution to prezygotic and postzygotic isolation in the speciation process.
CYTOGENETIC AND GENOME RESEARCH
(2023)
Article
Parasitology
Tomas Scholz, Andrea Waeschenbach, Mikulas Oros, Jan Brabec, D. Timothy J. Littlewood
Summary: This study presents the most comprehensive multi-gene molecular phylogeny of tapeworms of the order Caryophyllidea, revealing three well-supported lineages and highlighting the importance of host association and biogeographical distribution in their classification.
INTERNATIONAL JOURNAL FOR PARASITOLOGY
(2021)
Article
Biodiversity Conservation
Raul de Paula da Silva Frois, Bruno Oliveira Ribeiro, Jansen Zuanon, Amanda Frederico Mortati
Summary: Researchers assessed fish fauna of Amazonian streams in a landscape of forest fragments and savannah in Brazil, finding 43 species with Copella nattereri, Iguanodectes variatus and Laimosemion dibaphus being the most abundant species.
Article
Genetics & Heredity
Kevin Santos da Silva, Augusto Cesar Paes de Souza, Ananda Marques Pety, Renata Coelho Rodrigues Noronha, Marcelo Ricardo Vicari, Julio Cesar Pieczarka, Cleusa Yoshiko Nagamachi
Summary: This study conducted a comparative chromosomal analysis of two undescribed Peckoltia species from the Brazilian Amazon, revealing differences in karyotype formulas and repetitive sequence locations among the species, highlighting the chromosomal diversity within the Peckoltia genus.
FRONTIERS IN GENETICS
(2021)
Article
Biochemistry & Molecular Biology
Lei Wang, Yan Feng, Yan Wang, Jing Zhang, Qing Chen, Zhenshan Liu, Congli Liu, Wen He, Hao Wang, Shaofeng Yang, Yong Zhang, Ya Luo, Haoru Tang, Xiaorong Wang
Summary: Researchers have developed a pool of oligonucleotides for chromosome identification in Chinese cherry and other Prunus species, enabling precise and rapid analysis of chromosome organization and evolution. Comparative karyotype analysis showed a high degree of conservation among Prunus species.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Geography, Physical
Joao Paulo S. De Cortes, Rafael de Fraga, Fabiano N. Pupim, George L. Luvizotto
Summary: The Tapajos river, one of the largest in the world, has been credited as the main affluent of the lower Amazon River. Research focuses on evolutionary, hydrological, and sedimentological issues. This study proposes a channel classification system for the lower Tapajos based on morphometric variables, using discriminant analysis of principal components to provide a geomorphological classification. Different reaches of the channel exhibit distinct morphological patterns and hydrological and sedimentological variations, with implications on the ria's evolution and water resources management strategies.
PROGRESS IN PHYSICAL GEOGRAPHY-EARTH AND ENVIRONMENT
(2021)
Article
Parasitology
Marcelo Francisco da Silva, Francisco Geovanny Negreiros-Mendes, Luane Ellen Lopes-Silva, Jose Ledamir Sindeaux-Neto, Elane Guerreiro Giese, Igor Guerreiro Hamoy, Edilson Rodrigues Matos
Summary: This study identified a new species, Myxidium imperatrizensis n. sp., parasitizing the gallbladder of Triportheus angulatus fish captured in the middle Tocantins River in Brazil. It is the second report of Myxidium parasites in fish of the family Triportheidae in Brazilian rivers. The findings expand the known distribution of the genus Myxidium in the Tocantins River basin, which covers parts of the Cerrado savanna biome and the Amazon Forest in Brazil.
PARASITOLOGY INTERNATIONAL
(2021)
Article
Environmental Sciences
Quan Quan, Shaoze Gao, Yanwu Shang, Boxing Wang
Summary: This study investigated the impact of climate change and hydropower generation on the survival of indigenous fish in the source region of the Yellow River and proposed appropriate solutions. The results indicated that global warming is expected to reduce the negative effects caused by hydropower generation and increase the inhabitable area for fish.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Ana Sanchez-Perez, Mar Torralva, Jose Manuel Zamora-Marin, Francisco Javier Bravo-Cordoba, Francisco Javier Sanz-Ronda, Francisco Jose Oliva-Paterna
Summary: River connectivity is crucial for the resilience of fish assemblages and populations, and is a top priority for achieving good ecological status in river systems. The assessment of different types of multispecies fishways in a Mediterranean-type river showed clear ecological contributions, including their use as migration corridors and compensatory habitats for small and juvenile fish.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Veterinary Sciences
Mario Santoro, Marialetizia Palomba, Renato Aco Alburqueque, Simonetta Mattiucci
Summary: The Gymnorhynchidae family is a cestode family that includes three genera and six species. They are usually intestinal parasites of large pelagic sharks. These parasites have a wide distribution and pose a global sanitary concern as their larvae infect the edible flesh of commercially important fishes. In this study, larvae of Gymnorhynchidae were collected from Atlantic pomfret in the Mediterranean Sea and identified using various methods. The phylogenetic analysis revealed the relationship between different species and confirmed the co-infection of Molicola uncinatus and Gymnorhynchus gigas in all studied localities. The study also expanded the knowledge of intermediate hosts and geographical range of Molicola uncinatus. The results supported the suggestion that Gymnorhynchus gigas and Molicola species should be classified under the same genus. This study highlights the importance of integrative taxonomy in identifying trypanorhynch species and understanding the ecological and biological aspects of Gymnorhynchidae members.
FRONTIERS IN VETERINARY SCIENCE
(2022)
