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1.

001-es BibID:BIBFORM076618
035-os BibID:(cikkazonosító)e0204653 (WOS)000446383500033 (Scopus)85054465081
Első szerző:Ashrafzadeh, Mohammad Reza
Cím:Large-scale mitochondrial DNA analysis reveals new light on the phylogeography of Central and Eastern-European Brown hare (Lepus europaeus Pallas, 1778) / Mohammad Reza Ashrafzadeh, Mihajla Djan, László Szendrei, Algimantas Paulauskas, Massimo Scandura, Zoltán Bagi, Daniela Elena Ilie, Nikoloz Kerdikoshvili, Panek Marek, Noémi Soós, Szilvia Kusza
Dátum:2018
ISSN:1932-6203
Megjegyzések:European brown hare, Lepus europaeus, from Central and Eastern European countries (Hungary, Poland, Serbia, Lithuania, Romania, Georgia and Italy) were sampled, and phylogenetic analyses were carried out on two datasets: 1.) 137 sequences (358 bp) of control region mtDNA; and 2.) 105 sequences of a concatenated fragment (916 bp), including the cytochrome b, tRNA-Thr, tRNA-Pro and control region mitochondrial DNA. Our sequences were aligned with additional brown hare sequences from GenBank. A total of 52 and 51 haplotypes were detected within the two datasets, respectively, and assigned to two previously described major lineages: Anatolian/Middle Eastern (AME) and European (EUR). Furthermore, the European lineage was divided into two subclades including South Eastern European (SEE) and Central European (CE). Sympatric distribution of the lineages of the brown hare in South-Eastern and Eastern Europe revealed contact zones there. BAPS analysis assigned sequences from L. europaeus to five genetic clusters, whereas CE individuals were assigned to only one cluster, and AME and SEE sequences were each assigned to two clusters. Our findings uncover numerous novel haplotypes of Anatolian/Middle Eastern brown hare outside their main range, as evidence for the combined influence of Late Pleistocene climatic fluctuations and anthropogenic activities in shaping the phylogeographic structure of the species. Our results support the hypothesis of a postglacial brown hare expansion from Anatolia and the Balkan Peninsula to Central and Eastern Europe, and suggest some slight introgression of individual haplotypes from L. timidus to L. europaeus.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Plos One. - 13 : 10 (2018), p. 1-20. -
További szerzők:Djan, Mihajla (biológus) Szendrei László (1964-) (agrármérnök) Paulauskas, Algimantas Scandura, Massimo Bagi Zoltán (1987-) (természetvédelmi mérnök, állatgenetika) Ilie, Daniela Elena Kerdikoshvili, Nikoloz Marek, Panek Soós Noémi (1981-) (biológus) Kusza Szilvia (1979-) (agrármérnök)
Pályázati támogatás:EFOP-3.6.3-VEKOP-16-2017-00008
EFOP
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2.

001-es BibID:BIBFORM101367
035-os BibID:(cikkazonosító)e0266447 (WOS)000789855700035 (Scopus)85127917391
Első szerző:Bagi Zoltán (természetvédelmi mérnök, állatgenetika)
Cím:Genes and elements involved in the regulation of the nervous system and growth affect the development of spinal deformity in Cyprinus carpio / Zoltán Bagi, Katalin Balog, Bianka Tóth, Milán Fehér, Péter Bársony, Edina Baranyai, Sándor Harangi, Mohammad Reza Ashrafzadeh, Bettina Hegedűs, László Stündl, Szilvia Kusza
Dátum:2022
ISSN:1932-6203
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Plos One. - 17 : 4 (2022), p. 1-21. -
További szerzők:Balog Katalin (1998-) (állatgenetika) Tóth Bianka (1988-) (biológus) Fehér Milán (1985-) (agrármérnök) Bársony Péter (1975-) (agrármérnök) Baranyai Edina (1987-) (környezetkutató) Harangi Sándor (1987-) (vegyész) Ashrafzadeh, Mohammad Reza Hegedűs Bettina (1995-) (mezőgazdasági biotechnológus) Stündl László (1970-) (agrármérnök) Kusza Szilvia (1979-) (agrármérnök)
Pályázati támogatás:GINOP-2.3.2-15-2016-00025
GINOP
EFOP-3.6.3-VEKOP-16-2017-00008
EFOP
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3.

001-es BibID:BIBFORM072554
035-os BibID:(cikkazonosító)e0193935 (WOS)000426902900050 (Scopus)85043481861
Első szerző:Bagi Zoltán (természetvédelmi mérnök, állatgenetika)
Cím:MtDNA genetic diversity and structure of Eurasian Collared Dove (Streptopelia decaocto) / Zoltán Bagi, Evangelos Antonis Dimopoulos, Dimitrios Loukovitis, Cyril Eraud, Szilvia Kusza
Dátum:2018
ISSN:1932-6203
Megjegyzések:The Eurasian Collared Dove (Streptopelia decaocto) is one of the most successful biological invaders among terrestrial vertebrates. However, little information is available on the genetic diversity of the species. A total of 134 Eurasian Collared Doves from Europe, Asia and the Caribbean (n=20) were studied by sequencing a 658-bp length of mitochondrial DNA (mtDNA) cytochrome oxidase I (COI). Fifty-two different haplotypes and relatively high haplotype and nucleotide diversities (Hd?SD= 0.843?0.037 and ??SD= 0.026?0.013) were detected. Haplotype Ht1 was particularly dominant: it included 44.03% of the studied individuals, and contained sequences from 75% of the studied countries. Various analyses (FST, AMOVA, STRUCTURE) distinguished 2 groups on the genetic level, designated 'A' and 'B'. Two groups were also separated in the median-joining network and the maximum likelihood tree. The results of the neutrality tests were negative (Fu FS= -25.914; Tajima D= -2.606) and significantly different from zero (P?0.001) for group A, whereas both values for group B were positive (Fu FS= 1.811; Tajima D= 0.674) and not significant (P>0.05). Statistically significant positive autocorrelation was revealed among individuals located up to 2000 km apart (r=0.124; P=0.001). The present results provide the first information on the genetic diversity and structure of the Eurasian Collared Dove, and can thereby serve as a factual and comparative basis for similar studies in the future.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
demographic expansion
mitochondrial DNA
COI
non-invasive sampling
Columbidae
haplotypes
Megjelenés:Plos One. - 13 : 3 (2018), p. e0193935. -
További szerzők:Dimopoulos, Evangelos Antonis Loukovitis, Dimitrios Eraud, Cyril Kusza Szilvia (1979-) (agrármérnök)
Pályázati támogatás:EFOP-3.6.3-VEKOP-16-2017-00008
EFOP
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4.

001-es BibID:BIBFORM059219
Első szerző:Breeze, Tom D.
Cím:Agricultural Policies Exacerbate Honeybee Pollination Service Supply-Demand Mismatches Across Europe / Tom D. Breeze, Bernard E. Vaissière, Riccardo Bommarco, Theodora Petanidou, Nicos Seraphides, Lajos Kozák, Jeroen Scheper, Jacobus C. Biesmeijer, David Kleijn, Steen Gyldenkærne, Marco Moretti, Andrea Holzschuh, Ingolf Steffan-Dewenter, Jane C. Stout, Meelis Pärtel, Martin Zobel, Simon G. Potts
Dátum:2014
ISSN:1932-6203
Megjegyzések:Declines in insect pollinators across Europe have raised concerns about the supply of pollination services to agriculture. Simultaneously, EU agricultural and biofuel policies have encouraged substantial growth in the cultivated area of insect pollinated crops across the continent. Using data from 41 European countries, this study demonstrates that the recommended number of honeybees required to provide crop pollination across Europe has risen 4.9 times as fast as honeybee stocks between 2005 and 2010. Consequently, honeybee stocks were insufficient to supply >90% of demands in 22 countries studied. These findings raise concerns about the capacity of many countries to cope with major losses of wild pollinators and highlight numerous critical gaps in current understanding of pollination service supplies and demands, pointing to a pressing need for further research into this issue.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban
honey bees
pollination
insects
biofuels
Europe
rapeseed
agriculture
Habitats
Megjelenés:Plos One. - 9 : 1 (2014), p. e82996-. -
További szerzők:Vaissière, Bernard E. Bommarco, Riccardo Petanidou, Theodora Seraphides, Nicos Kozák Lajos (1974-) (biológus) Scheper, Jeroen Biesmeijer, Jacobus C. Kleijn, David Gyldenkærne, Steen Moretti, Marco Holzschuh, Andrea Steffan-Dewenter, Ingolf Stout, Jane C. Pärtel, Meelis Zobel, Martin Potts, Simon G.
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5.

001-es BibID:BIBFORM093746
035-os BibID:(cikkazonosító)e0248537 (WOS)000644138300041 (Scopus)85104636408
Első szerző:Fehér Milán (agrármérnök)
Cím:Effects of phytonutrient-supplemented diets on the intestinal microbiota of Cyprinus carpio / Milan Feher, Peter Fauszt, Emese Tolnai, Gabor Fidler, Georgina Pesti-Asboth, Aniko Stagel, Istvan Szucs, Sandor Biro, Judit Remenyik, Melinda Paholcsek, Laszlo Stundl
Dátum:2021
ISSN:1932-6203
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Plos One. - 16 : 4 (2021), p. 1-24. -
További szerzők:Fauszt Péter (1992-) (mikrobiom) Szilágyi-Tolnai Emese (1988-) (Molekuláris biológus) Fidler Gábor (1987-) (molekuláris biológus, genetikus) Pesti-Asbóth Georgina (1990-) (élelmiszerbiztonsági és -minőségi mérnök) Stágel Anikó (agrár) Szűcs István (1968-) (agrárközgazdász) Biró Sándor (1949-) (molekuláris genetikus) Gálné Remenyik Judit (1965-) (kémia tanár, okleveles vegyész) Paholcsek Melinda (1984-) (molekuláris biológus, genetikus) Stündl László (1970-) (agrármérnök)
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6.

001-es BibID:BIBFORM088166
035-os BibID:(cikkazonosító)e013873
Első szerző:Ilie, Daniela Elena
Cím:Microsatellite and Mitochondrial DNA Study of Native Eastern European Cattle Populations: The Case of the Romanian Grey / Ilie Daniela Elena, Cean Ada, Cziszter Ludovic Toma, Gavojdian Dinu, Iván Alexandra, Kusza Szilvia
Dátum:2015
ISSN:1932-6203 1932-6203
Megjegyzések:The Eastern European Grey cattle are regarded as the direct descendants of the aurochs(Bos taurus primigenius). Nowadays in Romania, less than 100 Grey animals are being reared and included in the national gene reserve. We examined the genetic diversity among Romanian Grey, Brown, Spotted and Black and White cattle breeds, with a particular focuson Romanian Grey through the use of (i) 11 bovine specific microsatellite markers on 83 animals and (ii) 638 bp length of mitochondrial DNA (mtDNA) D-loop region sequence data from a total of 81 animals. Both microsatellite and mtDNA analysis revealed a high level of genetic variation in the studied breeds. In Romanian Grey a total of 100 alleles were found,the mean number of observed alleles per locus was 9.091; the average observed heterozygosity was 0.940; the Wright's fixation index (FIS) was negative (-0.189) and indicates that there is no inbreeding and no selection pressure. MtDNA analysis revealed 52 haplotypes with 67 variable sites among the Romanian cattle breeds without any insertion or deletion.Haplotype diversity was 0.980?0.007 and ranged from 0.883?0.056 (Brown) to 0.990?0.028 (Spotted and Black and White). The highest genetic variability of the mtDNA was recorded in the Grey breed, where 18 haplotypes were identified. The most frequent mtDNAD-loop region belonged to T3 haplogroup (80.247%), which was found across all studied breeds, while T2 haplotypes (16.049%) was only found in Grey, Spotted and Black and White genotypes. The T1 haplotypes (3.704%) were found in the Grey and Spotted. The current results contribute to the general knowledge on genetic diversity found in Eastern European cattle breeds and could prove a valuable tool for the conservation efforts of animal genetic resources (FAnGR).
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
DNA Study
Native Eastern European Cattle Populations
Romanian Grey
Megjelenés:Plos One. - 10 : 9 (2015), p. 1-18. -
További szerzők:Cean, Ada Cziszter, Ludovic Toma Gavojdian, Dinu Iván Alexandra Kusza Szilvia (1979-) (agrármérnök)
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7.

001-es BibID:BIBFORM079295
035-os BibID:(cikkazonosító)e0197051 (WOS)000431757400057 (Scopus)85046772044
Első szerző:Ilie, Daniela Elena
Cím:Genetic characterization of indigenous goat breeds in Romania and Hungary with a special focus on genetic resistance to mastitis and gastrointestinal parasitism based on 40 SNPs / Daniela Elena Ilie, Kusza Szilvia, Maria Sauer, Dinu Gavojdian
Dátum:2018
ISSN:1932-6203
Megjegyzések:Goat breeding has become an important sector in Eastern Europe, with Romania and Hungary being among the major producer countries. Given the limited number of research done up-to-date concerning genetic studies of indigenous goat breeds reared in Romania and Hungary, the current preliminary study aimed to analyze the variability of genes related to mastitis and gastrointestinal parasitism by using Kompetitive Allele Specific PCR (KASP?). We studied 52 single nucleotide polymorphisms (SNPs) belonging to 19 genes in indigenous breeds from both countries, namely Banat's White (n = 36), Carpatina (n = 35) from Romania and Hungarian Milking (n = 79) and identified 16 polymorphic SNPs among 10 genes (PTX3, IL6, CLEC4E, IL8, IL1RN, IL15RA, TNFSF13, SOCS3, TNF and TLR3) in 150 animals. Furthermore, the diversity of the studied breeds was investigated. The PIC values ranged from 0.042 to 0.691. The mean values of observed and expected heterozygosity were 0.235 and 0.246 respectively. The highest observed heterozygosity was obtained for IL15RA g.10343904C>T in Banat's White (0.464), IL15RA g.10354813C>T in Carpatina (0.577) and SOCS3 g.52626440T>G in Hungarian Milking (0.588). Pairwise FST values between the Romanian breeds and Romanian and Hungarian breeds were small (0.009 and 0.015), indicating the close relationship among the studied goat populations. From all the polymorphic SNPs identified, the Hungarian Milking breed showed the highest proportion of polymorphisms (100%), whereas the Carpatina breed had the lowest percentage (87.5%). The highest value of MAF was obtained for SOCS3 g.52626440T>G (0.46), IL15RA g.10343904C>T (0.47), IL15RA g.10344025C>T (0.45), and IL15RA g.10354813C>T (0.42). The 16 polymorphic SNPs identified in a panel of 150 unrelated individuals belonging to three Romanian and Hungarian indigenous goat breeds could be used in future genomic based breeding schemes as markers for genetic resistance to mastitis and gastrointestinal parasitism in goat breeds found in Eastern and Central Europe.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Plos One. - 13 : 5 (2018), p. 1-14. -
További szerzők:Kusza Szilvia (1979-) (agrármérnök) Sauer, Maria Gavojdian, Dinu
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8.

001-es BibID:BIBFORM057868
035-os BibID:WOS:000345250400093
Első szerző:Karimi Aghcheh, Razieh
Cím:The VELVET A orthologue VEL1 of Trichoderma reesei regulates fungal development and is essential for cellulase gene expression / Razieh Karimi Aghcheh, Zoltán Németh, Lea Atanasova, Erzsébet Fekete, Melinda Paholcsek, Erzsébet Sándor, Benigno Aquino, Irina S. Druzhinina, Levente Karaffa, Christian P. Kubicek
Dátum:2014
ISSN:1932-6203
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:PLoS One. - 9 : 11 (2014), p. e112799-1 - e112799-10. -
További szerzők:Németh Zoltán (1987-) (biomérnök) Atanasova, Lea Fekete Erzsébet (1975-) (biotechnológus, egyetemi tanár) Paholcsek Melinda (1984-) (molekuláris biológus, genetikus) Karaffa Erzsébet Mónika (1972-) (mikrobiológus, egyetemi tanár) Aquino, Benigno Druzhinina, Irina S. Karaffa Levente (1971-) (biotechnológus, egyetemi tanár) Kubicek, Christian P.
Pályázati támogatás:TÁMOP-4.2.4.A/2-11/1-2012-0001
TÁMOP
TÁMOP-4.2.2.A-11/1/KONV-2012-0043
TÁMOP
OTKA-K1006600
OTKA
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9.

001-es BibID:BIBFORM059218
Első szerző:Kusza Szilvia (agrármérnök)
Cím:Contemporary Genetic Structure, Phylogeography and Past Demographic Processes of Wild Boar Sus scrofa Population in Central and Eastern Europe / Szilvia Kusza, Tomasz Podgórski, Massimo Scandura, Tomasz Borowik, András Jávor, Vadim E. Sidorovich, Aleksei N. Bunevich, Mikhail Kolesnikov, Bogumiła Jędrzejewska
Dátum:2014
ISSN:1932-6203
Megjegyzések:The wild boar (Sus scrofa) is one of the most widely distributed mammals in Europe. Its demography was affected by various events in the past and today populations are increasing throughout Europe. We examined genetic diversity, structure and population dynamics of wild boar in Central and Eastern Europe. MtDNA control region (664 bp) was sequenced in 254 wild boar from six countries (Poland, Hungary, Belarus, Ukraine, Moldova and the European part of Russia). We detected 16 haplotypes, all known from previous studies in Europe; 14 of them belonged to European 1 (E1) clade, including 13 haplotypes from E1-C and one from E1-A lineages. Two haplotypes belonged respectively to the East Asian and the Near Eastern clade. Both haplotypes were found in Russia and most probably originated from the documented translocations of wild boar. The studied populations showed moderate haplotype (0.714?0.023) and low nucleotide diversity (0.003?0.002). SAMOVA grouped the genetic structuring of Central and Eastern European wild boar into three subpopulations, comprising of: (1) north-eastern Belarus and the European part of Russia, (2) Poland, Ukraine, Moldova and most of Belarus, and (3) Hungary. The multimodal mismatch distribution, Fu's Fs index, Bayesian skyline plot and the high occurrence of shared haplotypes among populations did not suggest strong demographic fluctuations in wild boar numbers in the Holocene and pre-Holocene times. This study showed relatively weak genetic diversity and structure in Central and Eastern European wild boar populations and underlined gaps in our knowledge on the role of southern refugia and demographic processes shaping genetic diversity of wild boar in this part of Europe.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban
MITOCHONDRIAL-DNA
PIG DOMESTICATION
WESTERN EURASIA
ANCIENT DNA
DIVERSITY
COLONIZATION
POLYMORPHISM
EVOLUTION
SOFTWARE
Megjelenés:Plos One. - 9 : 3 (2014), p. e91401-. -
További szerzők:Podgórski, Tomasz Scandura, Massimo Borowik, Tomasz Jávor András (1952-) (agrármérnök) Sidorovich, Vadim E. Bunevich, Aleksei N. Kolesnikov, Mikhail Jędrzejewska, Bogumiła
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10.

001-es BibID:BIBFORM116373
035-os BibID:(cikkazonosító)e0290310 (WoS)001051745900088 (Scopus)85168299624
Első szerző:Pesti-Asbóth Georgina (élelmiszerbiztonsági és -minőségi mérnök)
Cím:Monitoring physiological processes of fast-growing broilers during the whole life cycle : Changes of redox-homeostasis effected to trassulfuration pathway predicting the development of non-alcoholic fatty liver disease / Georgina Pesti-Asbóth, Endre Szilágyi, Piroska Bíróné Molnár, János Oláh, László Babinszky, Levente Czeglédi, Zoltán Cziáky, Melinda Paholcsek, László Stündl, Judit Remenyik
Dátum:2023
ISSN:1932-6203
Megjegyzések:In the broiler industry, the average daily gain and feed conversion ratio are extremely favorable, but the birds are beginning to approach the maximum of their genetic capacity. However, as a consequence of strong genetic selection, the occurrence of certain metabolic diseases, such as myopathies, ascites, sudden cardiac death and tibial dyschondroplasia, is increasing. These metabolic diseases can greatly affect the health status and welfare of birds, as well as the quality of meat. The main goal of this study was to investigate the changes in the main parameters of redox homeostasis during the rearing (1-42 days of age) of broilers with high genetic capacity, such as the concentrations of malondialdehyde, vitamin C, vitamin E, and reduced glutathione, the activities of glutathione peroxidase and glutathione reductase, and the inhibition rate of superoxide dismutase. Damage to the transsulfuration pathway during growth and the reason for changes in the level of homocysteine were investigated. Further, the parameters that can characterize the biochemical changes occurring in the birds were examined. Our study is the first characterize plasma albumin saturation. A method was developed to measure the levels of other small molecule thiol components of plasma. Changes in redox homeostasis induce increases in the concentrations of tumor necrosis factor alpha and inflammatory interleukins interleukin 2, interleukin 6 and interleukin 8 in broilers reared according to current large-scale husbandry technology and feeding protocols. A significant difference in all parameters tested was observed on the 21st day. The concentrations of cytokines and homocysteine increased, while the concentrations of glutathione and cysteine in the plasma decreased. Our findings suggest that observed changes in the abovementioned biochemical indices have a negative effect on poultry health.
Tárgyszavak:Agrártudományok Élelmiszertudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Animals
Chickens
Glutathione
Homeostasis
Non-alcoholic Fatty Liver Disease
Oxidation-Reduction
Physiological Phenomena
Megjelenés:Plos One. - 18 : 8 (2023), p. 1-28. -
További szerzők:Szilágyi Endre (1986-) Bíróné Molnár Piroska (1970-) (biokémia) Oláh János (1976-) (állattenyésztés) Babinszky László (1950-) (agrár) Czeglédi Levente (1977-) (agrármérnök) Cziáky Zoltán Paholcsek Melinda (1984-) (molekuláris biológus, genetikus) Stündl László (1970-) (agrármérnök) Gálné Remenyik Judit (1965-) (kémia tanár, okleveles vegyész)
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11.

001-es BibID:BIBFORM080750
035-os BibID:(cikkazonosító)e0221767 (WOS)000506867400001 (Scopus)85071943925
Első szerző:Petek, Marko
Cím:Beetroot mineral composition affected by mineral and organic fertilization / Marko Petek, Nina Toth, Marija Pecina, Tomislav Karažija, Boris Lazarević, Igor Palčić, Szilvia Veres, Mirjana Herak Ćustić
Dátum:2019
ISSN:1932-6203
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Plos One. - 14 : 9 (2019), p. e0221767-e0221782. -
További szerzők:Toth, Nina Pecina, Marija Karažija, Tomislav Lazarević, Boris (1982-) (növényélettanász) Palčić, Igor Veres Szilvia (1972-) (biológus, biológia középiskolai tanár, angol-magyar szakfordító) Ćustić, Mirjana Herak
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12.

001-es BibID:BIBFORM055088
Első szerző:Sipiczki Mátyás (biológus)
Cím:Metschnikowia Species Share a Pool of Diverse rRNA Genes Differing in Regions That Determine Hairpin-Loop Structures and Evolve by Reticulation / Matthias Sipiczki, Walter P. Pfliegler, Imre J. Holb
Dátum:2013
ISSN:1932-6203
Megjegyzések:Modern taxonomy of yeasts is mainly based on phylogenetic analysis of conserved DNA and protein sequences. By far the most frequently used sequences are those of the repeats of the chromosomal rDNA array. It is generally accepted that the rDNA repeats of a genome have identical sequences due to the phenomenon of sequence homogenisation and can thus be used for identification and barcoding of species. Here we show that the rDNA arrays of the type strains of Metschnikowia andauensis and M. fructicola are not homogenised. Both have arrays consisting of diverse repeats that differ from each other in the D1/D2 domains by up to 18 and 25 substitutions. The variable sites are concentrated in two regions that correspond to back-folding stretches of hairpin loops in the predicted secondary structure of the RNA molecules. The substitutions do not alter significantly the overall hairpin-loop structure due to wobble base pairing at sites of C-T transitions and compensatory mutations in the complementary strand of the hairpin stem. The phylogenetic and network analyses of the cloned sequences revealed that the repeats had not evolved in a vertical tree-like way but reticulation might have shaped the rDNA arrays of both strains. The neighbour-net analysis of all cloned sequences of the type strains and the database sequences of different strains further showed that these species share a continuous pool of diverse repeats that appear to evolve by reticulate evolution.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Plos One. - 8 : 6 (2013), p. e67384-. -
További szerzők:Pfliegler Valter Péter (1986-) (molekuláris biológus) Holb Imre (1973-) (agrármérnök)
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