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Ricardo José Gunski - One of the best experts on this subject based on the ideXlab platform.
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Distribution of CR1-like transposable element in woodpeckers (Aves Piciformes): Z sex chromosomes can act as a refuge for transposable elements
Chromosome Research, 2018Co-Authors: Natasha Avila Bertocchi, Thays Duarte Oliveira, Analía Garnero, Rafael Luiz Buogo Coan, Ricardo José Gunski, Cesar Martins, Fabiano Pimentel TorresAbstract:Birds have relatively few repetitive sequences compared to other groups of vertebrates; however, the members of order Piciformes (woodpeckers) have more of these sequences, composed mainly of transposable elements (TE). The TE most often found in birds is a retrotransposon chicken repeat 1 (CR1). Piciformes lineages were subjected to an expansion of the CR1 elements, carrying a larger fraction of transposable elements. This study compared patterns of chromosome distribution among five bird species, through chromosome mapping of the CR1 sequence and reconstructed their phylogenetic tree. We analyzed several members of Piciformes ( Colaptes campestris , Colaptes melanochloros , Melanerpes candidus , and Veniliornis spilogaster ), as well as Galliformes ( Gallus gallus ). Gallus gallus is the species with which most genomic and hence cytogenetic studies have been performed. The results showed that CR1 sequences are a monophyletic group and do not depend on their hosts. All species analyzed showed a hybridization signal by fluorescence in situ hybridization (FISH). In all species, the chromosomal distribution of CR1 was not restricted to heterochromatin regions in the macrochromosomes, principally pair 1 and the Z sex chromosome. Accumulation in the Z sex chromosomes can serve as a refuge for transposable elements. These results highlight the importance of transposable elements in host genomes and karyotype evolution.
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Genomic Organization of Repetitive DNA in Woodpeckers (Aves, Piciformes): Implications for Karyotype and ZW Sex Chromosome Differentiation.
PloS one, 2017Co-Authors: Thays Duarte Oliveira, Natasha Avila Bertocchi, Rafael Kretschmer, Tiago Marafiga Degrandi, Edivaldo Herculano Corrêa De Oliveira, Marcelo De Bello Cioffi, Analía Del Valle Garnero, Ricardo José GunskiAbstract:Birds are characterized by a low proportion of repetitive DNA in their genome when compared to other vertebrates. Among birds, species belonging to Piciformes order, such as woodpeckers, show a relatively higher amount of these sequences. The aim of this study was to analyze the distribution of different classes of repetitive DNA-including microsatellites, telomere sequences and 18S rDNA-in the karyotype of three Picidae species (Aves, Piciformes)-Colaptes melanochloros (2n = 84), Colaptes campestris (2n = 84) and Melanerpes candidus (2n = 64)-by means of fluorescence in situ hybridization. Clusters of 18S rDNA were found in one microchromosome pair in each of the three species, coinciding to a region of (CGG)10 sequence accumulation. Interstitial telomeric sequences were found in some macrochromosomes pairs, indicating possible regions of fusions, which can be related to variation of diploid number in the family. Only one, from the 11 different microsatellite sequences used, did not produce any signals. Both species of genus Colaptes showed a similar distribution of microsatellite sequences, with some difference when compared to M. candidus. Microsatellites were found preferentially in the centromeric and telomeric regions of micro and macrochromosomes. However, some sequences produced patterns of interstitial bands in the Z chromosome, which corresponds to the largest element of the karyotype in all three species. This was not observed in the W chromosome of Colaptes melanochloros, which is heterochromatic in most of its length, but was not hybridized by any of the sequences used. These results highlight the importance of microsatellite sequences in differentiation of sex chromosomes, and the accumulation of these sequences is probably responsible for the enlargement of the Z chromosome.
Natasha Avila Bertocchi - One of the best experts on this subject based on the ideXlab platform.
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Distribution of CR1-like transposable element in woodpeckers (Aves Piciformes): Z sex chromosomes can act as a refuge for transposable elements
Chromosome Research, 2018Co-Authors: Natasha Avila Bertocchi, Thays Duarte Oliveira, Analía Garnero, Rafael Luiz Buogo Coan, Ricardo José Gunski, Cesar Martins, Fabiano Pimentel TorresAbstract:Birds have relatively few repetitive sequences compared to other groups of vertebrates; however, the members of order Piciformes (woodpeckers) have more of these sequences, composed mainly of transposable elements (TE). The TE most often found in birds is a retrotransposon chicken repeat 1 (CR1). Piciformes lineages were subjected to an expansion of the CR1 elements, carrying a larger fraction of transposable elements. This study compared patterns of chromosome distribution among five bird species, through chromosome mapping of the CR1 sequence and reconstructed their phylogenetic tree. We analyzed several members of Piciformes ( Colaptes campestris , Colaptes melanochloros , Melanerpes candidus , and Veniliornis spilogaster ), as well as Galliformes ( Gallus gallus ). Gallus gallus is the species with which most genomic and hence cytogenetic studies have been performed. The results showed that CR1 sequences are a monophyletic group and do not depend on their hosts. All species analyzed showed a hybridization signal by fluorescence in situ hybridization (FISH). In all species, the chromosomal distribution of CR1 was not restricted to heterochromatin regions in the macrochromosomes, principally pair 1 and the Z sex chromosome. Accumulation in the Z sex chromosomes can serve as a refuge for transposable elements. These results highlight the importance of transposable elements in host genomes and karyotype evolution.
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Genomic Organization of Repetitive DNA in Woodpeckers (Aves, Piciformes): Implications for Karyotype and ZW Sex Chromosome Differentiation.
PloS one, 2017Co-Authors: Thays Duarte Oliveira, Natasha Avila Bertocchi, Rafael Kretschmer, Tiago Marafiga Degrandi, Edivaldo Herculano Corrêa De Oliveira, Marcelo De Bello Cioffi, Analía Del Valle Garnero, Ricardo José GunskiAbstract:Birds are characterized by a low proportion of repetitive DNA in their genome when compared to other vertebrates. Among birds, species belonging to Piciformes order, such as woodpeckers, show a relatively higher amount of these sequences. The aim of this study was to analyze the distribution of different classes of repetitive DNA-including microsatellites, telomere sequences and 18S rDNA-in the karyotype of three Picidae species (Aves, Piciformes)-Colaptes melanochloros (2n = 84), Colaptes campestris (2n = 84) and Melanerpes candidus (2n = 64)-by means of fluorescence in situ hybridization. Clusters of 18S rDNA were found in one microchromosome pair in each of the three species, coinciding to a region of (CGG)10 sequence accumulation. Interstitial telomeric sequences were found in some macrochromosomes pairs, indicating possible regions of fusions, which can be related to variation of diploid number in the family. Only one, from the 11 different microsatellite sequences used, did not produce any signals. Both species of genus Colaptes showed a similar distribution of microsatellite sequences, with some difference when compared to M. candidus. Microsatellites were found preferentially in the centromeric and telomeric regions of micro and macrochromosomes. However, some sequences produced patterns of interstitial bands in the Z chromosome, which corresponds to the largest element of the karyotype in all three species. This was not observed in the W chromosome of Colaptes melanochloros, which is heterochromatic in most of its length, but was not hybridized by any of the sequences used. These results highlight the importance of microsatellite sequences in differentiation of sex chromosomes, and the accumulation of these sequences is probably responsible for the enlargement of the Z chromosome.
Thays Duarte Oliveira - One of the best experts on this subject based on the ideXlab platform.
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Distribution of CR1-like transposable element in woodpeckers (Aves Piciformes): Z sex chromosomes can act as a refuge for transposable elements
Chromosome Research, 2018Co-Authors: Natasha Avila Bertocchi, Thays Duarte Oliveira, Analía Garnero, Rafael Luiz Buogo Coan, Ricardo José Gunski, Cesar Martins, Fabiano Pimentel TorresAbstract:Birds have relatively few repetitive sequences compared to other groups of vertebrates; however, the members of order Piciformes (woodpeckers) have more of these sequences, composed mainly of transposable elements (TE). The TE most often found in birds is a retrotransposon chicken repeat 1 (CR1). Piciformes lineages were subjected to an expansion of the CR1 elements, carrying a larger fraction of transposable elements. This study compared patterns of chromosome distribution among five bird species, through chromosome mapping of the CR1 sequence and reconstructed their phylogenetic tree. We analyzed several members of Piciformes ( Colaptes campestris , Colaptes melanochloros , Melanerpes candidus , and Veniliornis spilogaster ), as well as Galliformes ( Gallus gallus ). Gallus gallus is the species with which most genomic and hence cytogenetic studies have been performed. The results showed that CR1 sequences are a monophyletic group and do not depend on their hosts. All species analyzed showed a hybridization signal by fluorescence in situ hybridization (FISH). In all species, the chromosomal distribution of CR1 was not restricted to heterochromatin regions in the macrochromosomes, principally pair 1 and the Z sex chromosome. Accumulation in the Z sex chromosomes can serve as a refuge for transposable elements. These results highlight the importance of transposable elements in host genomes and karyotype evolution.
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Genomic Organization of Repetitive DNA in Woodpeckers (Aves, Piciformes): Implications for Karyotype and ZW Sex Chromosome Differentiation.
PloS one, 2017Co-Authors: Thays Duarte Oliveira, Natasha Avila Bertocchi, Rafael Kretschmer, Tiago Marafiga Degrandi, Edivaldo Herculano Corrêa De Oliveira, Marcelo De Bello Cioffi, Analía Del Valle Garnero, Ricardo José GunskiAbstract:Birds are characterized by a low proportion of repetitive DNA in their genome when compared to other vertebrates. Among birds, species belonging to Piciformes order, such as woodpeckers, show a relatively higher amount of these sequences. The aim of this study was to analyze the distribution of different classes of repetitive DNA-including microsatellites, telomere sequences and 18S rDNA-in the karyotype of three Picidae species (Aves, Piciformes)-Colaptes melanochloros (2n = 84), Colaptes campestris (2n = 84) and Melanerpes candidus (2n = 64)-by means of fluorescence in situ hybridization. Clusters of 18S rDNA were found in one microchromosome pair in each of the three species, coinciding to a region of (CGG)10 sequence accumulation. Interstitial telomeric sequences were found in some macrochromosomes pairs, indicating possible regions of fusions, which can be related to variation of diploid number in the family. Only one, from the 11 different microsatellite sequences used, did not produce any signals. Both species of genus Colaptes showed a similar distribution of microsatellite sequences, with some difference when compared to M. candidus. Microsatellites were found preferentially in the centromeric and telomeric regions of micro and macrochromosomes. However, some sequences produced patterns of interstitial bands in the Z chromosome, which corresponds to the largest element of the karyotype in all three species. This was not observed in the W chromosome of Colaptes melanochloros, which is heterochromatic in most of its length, but was not hybridized by any of the sequences used. These results highlight the importance of microsatellite sequences in differentiation of sex chromosomes, and the accumulation of these sequences is probably responsible for the enlargement of the Z chromosome.
Fabiano Pimentel Torres - One of the best experts on this subject based on the ideXlab platform.
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Distribution of CR1-like transposable element in woodpeckers (Aves Piciformes): Z sex chromosomes can act as a refuge for transposable elements
Chromosome Research, 2018Co-Authors: Natasha Avila Bertocchi, Thays Duarte Oliveira, Analía Garnero, Rafael Luiz Buogo Coan, Ricardo José Gunski, Cesar Martins, Fabiano Pimentel TorresAbstract:Birds have relatively few repetitive sequences compared to other groups of vertebrates; however, the members of order Piciformes (woodpeckers) have more of these sequences, composed mainly of transposable elements (TE). The TE most often found in birds is a retrotransposon chicken repeat 1 (CR1). Piciformes lineages were subjected to an expansion of the CR1 elements, carrying a larger fraction of transposable elements. This study compared patterns of chromosome distribution among five bird species, through chromosome mapping of the CR1 sequence and reconstructed their phylogenetic tree. We analyzed several members of Piciformes ( Colaptes campestris , Colaptes melanochloros , Melanerpes candidus , and Veniliornis spilogaster ), as well as Galliformes ( Gallus gallus ). Gallus gallus is the species with which most genomic and hence cytogenetic studies have been performed. The results showed that CR1 sequences are a monophyletic group and do not depend on their hosts. All species analyzed showed a hybridization signal by fluorescence in situ hybridization (FISH). In all species, the chromosomal distribution of CR1 was not restricted to heterochromatin regions in the macrochromosomes, principally pair 1 and the Z sex chromosome. Accumulation in the Z sex chromosomes can serve as a refuge for transposable elements. These results highlight the importance of transposable elements in host genomes and karyotype evolution.
Maciej Skoracki - One of the best experts on this subject based on the ideXlab platform.
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Rafapicobia olszanowskii, a New Species of Syringophilid Mite (Acariformes: Syringophilidae) from Semnornis ramphastinus (Piciformes: Semnornithidae)
Annales Zoologici, 2020Co-Authors: Maciej Skoracki, Mateusz Zmudzinski, Bozena SikoraAbstract:A new quill mite species Rafapicobia olszanowskiisp. nov., belonging to the subfamily Picobiinae (Acariformes: Syringophilidae), is described from quills of contour feathers of the Toucan Barbet Semnornis ramphastinus (Jardine) (Piciformes: Semnornithidae) from Ecuador. Our finding is the first record of syringophilid mites on birds of the family Semnornithidae.
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Quill mites of the subfamily Picobiinae (Acari: Syringophilidae) parasitising African birds, with description of two new species.
Folia parasitologica, 2014Co-Authors: Miroslava Klimovičová, Maciej Skoracki, Wanyoike Wamiti, Martin HromadaAbstract:Two new species of the subfamily Picobiinae (Acari: Prostigmata: Syringophilidae) are described: Picobia ploceus sp. n. from Ploceus ocularis Smith (Passeriformes: Ploceidae) and Picobia lamprotornis sp. n. from Lamprotornis superbus (Ruppell) (Passeriformes: Sturnidae), both from Kenya. Additionally, new hosts are recorded: Turdoides jardineii (Smith) (Passeriformes: Leiothrichidae) from Kenya and Tanzania, T. rubiginosa (Ruppell) from Kenya, T. leucopygia (Ruppell) from Zambia and Namibia, for Picobia dziabaszewskii Glowska, Dragun-Damian et Dabert, 2012; Pycnonotus barbatus (Desfontaines) (Passeriformes: Pycnonotidae) from Kenya, for Picobia pycnonoti Glowska, Skoracki et Khourly, 2007; Dendropicos griseocephalus (Boddaert) (Piciformes: Picidae) from Tanzania and D. goertae (St. Muller) from Kenya, for Neopicobia freya Skoracki et Unsoeld, 2014; Dendropicos fuscescens (Vieillot) from Zambia and Campethera nubica (Boddaert) from Kenya, for Picobia dryobatis (Fritsch, 1958).
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Quill mites of the subfamily Picobiinae (Acari: Syringophilidae) associated with woodpeckers (Aves: Piciformes: Picidae)
Acta Parasitologica, 2014Co-Authors: Maciej Skoracki, Markus Unsoeld, Katarzyna Kavetska, Katarzyna KaszewskaAbstract:The paper contains a review of quill mites of the subfamily Picobiinae (Acari: Prostigmata: Syringophilidae) associated with woodpeckers (Aves: Piciformes: Picidae). Three new species are described: Picobia mentalis Skoracki et Unsoeld sp. nov. from Picus mentalis Temminck, Neopicobia ea Skoracki et Unsoeld sp. nov. from Celeus flavus (St. Mueller) (type host), C. elegans (St. Mueller), C. torquatus (Boddaert), and Neopicobia freya Skoracki et Unsoeld sp. nov. from Dryocopus galeatus (Temminck) (type host) and Piculus rubiginosus (Swainson). Additionally, six new host species for Picobia heeri Haller, 1878 and 12 new host species for Picobia dryobatis (Fritsch, 1956) are reported. A complete list of the picobiines parasitising birds of the family Picidae is presented in the tabular form.
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New genus and three new species of quill mites (Acari: Syringophilidae: Picobiinae) parasitising puffbirds (Aves: Piciformes).
Folia parasitologica, 2012Co-Authors: Maciej Skoracki, Katarzyna Scibek, Bozena SikoraAbstract:Three new species, belonging to the newly proposed genus Pseudopicobia gen. n., inhabiting body quill feathers of puffbirds (Piciformes: Bucconidae), are described: P. nonnula sp. n. from Nonnula frontalis (Sclater) in Colombia, P. malacoptila sp. n. from Malacoptila panamensis Lafresnaye in Colombia and P. hapaloptila sp. n. from Hapaloptila castanea (Verreaux) in Ecuador. The new genus differs from morphologically similar genus Picobia Heller, 1878 by the absence of the genital setae, absence of the genital lobes, solenidia φI represented by microsetae, and by the presence of setiform solenidia σI. Syringophilid mites are recorded from birds of this family for the first time.
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new taxa of quill mites acari cheyletoidea syringophilidae
Zootaxa, 2010Co-Authors: Maciej Skoracki, Barry M. OconnorAbstract:Four new genera and eight new species are described: Apodisyringophilus collocalius gen. nov., sp. nov. from Collocalia esculenta (Linnaeus) (Apodiformes: Apodidae) from the Philippines, Bochkovia phalaropi gen. nov., sp. nov. from Phalaropus fulicarius (Linnaeus) (Charadriiformes: Scolopacidae) from the USA, Ciconichenophilus phoeniconaias gen. nov., sp. nov. and Stibarokris phoeniconaias sp. nov. from Phoeniconaias minor (Geoffroy SaintHilaire) (Phoenicopteriformes: Phoenicopteridae) from Botswana, Picisyringophilus kratos gen. nov., sp. nov. from Picoides pubescens (Linnaeus) (Piciformes: Picidae) from the USA, Charadriiphilus re sp. nov. and Picobia pteroclesi sp. nov. from Pterocles senegallus (Linnaeus) (Pteroclidiformes: Pteroclididae) from Egypt, and Neoaulonastus chrysocolaptes sp. nov. from Chrysocolaptes lucidus (Scopoli) (Piciformes: Picidae) from the Philippines. The new genera differ from the closely related genera by the following characters: Apodisyringophilus gen. nov. differs from Syringophiloidus Kethley by the absence of leg setae lGIV, the presence of the short hysteronotal setae and by apodemes I fused to apodemes II; Bochkovia gen. nov. differs from Procellariisyringophilus Schmidt et Skoracki by the presence of the dentate cheliceral stylets and two pairs of pseudanal setae, the absence of setae vsI and by the presence of the strongly curved claws on tarsi I-IV; Ciconichenophilus gen. nov. differs from Chenophila Kethley by the stylophore rounded posteriorly, the long hysteronotal setae, apodemes I not fused to apodemes II and by the absence of leg setae vsII; Picisyringophilus gen. nov. differs from Mironovia Chirov et Kravtsova by coxal fields I and II subequal in sizesand by setae se situated distinctly anterior to setae c1. Data on distribution of all known syringophilid genera on host families and orders are provided.