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<mods:title id="6AF768FA4D2BFAA3DC7186E75F851E7D">A review on the cytogenetics of the tribe Oryzomyini (Rodentia: Cricetidae: Sigmodontinae), with the description of new karyotypes</mods:title>
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<treatment id="03A587ED322DFFC683E9F9BB2FFFFD42" ID-DOI="http://doi.org/10.5281/zenodo.4424090" ID-GBIF-Taxon="179917865" ID-Zenodo-Dep="4424090" LSID="urn:lsid:plazi:treatment:03A587ED322DFFC683E9F9BB2FFFFD42" httpUri="http://treatment.plazi.org/id/03A587ED322DFFC683E9F9BB2FFFFD42" lastPageId="19" lastPageNumber="20" pageId="18" pageNumber="19">
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<paragraph id="8BB336FB322DFFC783E9F9BB2D5EF951" blockId="18.[151,1437,1660,2011]" box="[151,373,1660,1686]" pageId="18" pageNumber="19">
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<taxonomicName id="4C0C4D78322DFFC783E9F9BB2D5EF951" baseAuthorityName="Wagner" baseAuthorityYear="1842" box="[151,373,1660,1686]" class="Mammalia" family="Muridae" genus="Holochilus" kingdom="Animalia" order="Rodentia" pageId="18" pageNumber="19" phylum="Chordata" rank="species" species="sciureus">
<emphasis id="B978EAE9322DFFC783E9F9BB2D5EF951" box="[151,373,1660,1686]" italics="true" pageId="18" pageNumber="19">Holochilus sciureus</emphasis>
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<paragraph id="8BB336FB322DFFC683B9F966282BFF3E" blockId="18.[151,1437,1660,2011]" lastBlockId="19.[151,1437,151,645]" lastPageId="19" lastPageNumber="20" pageId="18" pageNumber="19">
Karyotype: 2n = 56 and FN = 56. Autosomal complement: one small metacentric pair, and 26 acrocentric pairs large to small decreasing in size. Sex chromosomes: X, a medium acrocentric; Y, a small acrocentric (
<bibRefCitation id="EF9D4B0A322DFFC7865EF9032D0BF8C5" author="Gardner, A. L. &amp; Patton, J. L." pageId="18" pageNumber="19" pagination="1 - 48" refId="ref67114" refString="Gardner, A. L. &amp; Patton, J. L. (1976) Karyotypic variation in Oryzomyine rodents (Cricetinae) with comments on chromosomal evolution in the Neotropical Cricetine complex. Occasional papers of the Museum of Zoology, 49, 1 - 48." type="journal article" year="1976">Gardner &amp; Patton 1976</bibRefCitation>
;
<bibRefCitation id="EF9D4B0A322DFFC78254F92F2DC8F8C5" author="Vidal, O. R. &amp; Riva, R. &amp; Baro, N. I." box="[298,483,1768,1795]" pageId="18" pageNumber="19" pagination="75 - 85" refId="ref74728" refString="Vidal, O. R., Riva, R. &amp; Baro, N. I. (1976) Los cromosomas del genero Holochilus. I. Polimorfismo en H. chacarius Thomas (1906). Physis, 35, 75 - 85." type="journal article" year="1976">
Vidal
<emphasis id="B978EAE9322DFFC78212F92E2DB7F8C5" box="[364,412,1768,1794]" italics="true" pageId="18" pageNumber="19">et al</emphasis>
. 1976
</bibRefCitation>
;
<bibRefCitation id="EF9D4B0A322DFFC78290F92E2E9EF8C5" author="Patton, J. L. &amp; Silva, M. N. &amp; Malcolm, J. R." box="[494,693,1768,1795]" pageId="18" pageNumber="19" pagination="1 - 306" refId="ref71077" refString="Patton, J. L., Silva, M. N. &amp; Malcolm, J. R. (2000) Mammals of the Rio Jurua and the evolutionary and ecological diversification of Amazonia. Bulletin of the American Museum of Natural History, 244, 1 - 306. https: // doi. org / 10.1206 / 0003 - 0090 (2000) 244 % 3 C 0001: MOTRJA % 3 E 2.0. CO; 2" type="journal article" year="2000">
Patton
<emphasis id="B978EAE9322DFFC78145F92E2E40F8C5" box="[571,619,1768,1794]" italics="true" pageId="18" pageNumber="19">et al</emphasis>
. 2000
</bibRefCitation>
).A fundamental number of 55 was reported due to a heteromorphic centric fusion (
<bibRefCitation id="EF9D4B0A322DFFC78240F8CB2E27F8E1" author="Freitas, T. R. O. &amp; Mattevi, M. S. &amp; Oliveira, L. F. B. &amp; Souza, M. J. &amp; Yonenaga-Yassuda, Y. &amp; Salzano, F. M." box="[318,524,1804,1831]" pageId="18" pageNumber="19" pagination="13 - 20" refId="ref66921" refString="Freitas, T. R. O., Mattevi, M. S., Oliveira, L. F. B., Souza, M. J., Yonenaga-Yassuda, Y. &amp; Salzano, F. M. (1983) Chromosome relationships in three representatives of the genus Holochilus (Rodentia, Cricetidae) from Brazil. Genetica, 61, 13 - 20. https: // doi. org / 10.1007 / BF 00563228" type="journal article" year="1983">
Freitas
<emphasis id="B978EAE9322DFFC782EDF8CA2DEFF8E1" box="[403,452,1804,1830]" italics="true" pageId="18" pageNumber="19">et al</emphasis>
. 1983
</bibRefCitation>
, pp. 17,
<figureCitation id="13372A7E322DFFC78114F8CB2E86F8E0" box="[618,685,1804,1831]" captionStart="FIGURE 6" captionStartId="23.[151,250,1625,1649]" captionTargetBox="[160,1430,712,1595]" captionTargetId="figure-177@23.[151,1436,705,1602]" captionTargetPageId="23" captionText="FIGURE 6. Distribution of diploid and fundamental number of karyotyped specimens of genus Hylaeamys. (□) H. megacephalus; (■) H. oniscus; (○) H. perenensis; (l) H. seuanezi; (ê) H. yunganus." figureDoi="http://doi.org/10.5281/zenodo.4423629" httpUri="https://zenodo.org/record/4423629/files/figure.png" pageId="18" pageNumber="19">Fig. 6</figureCitation>
). A different morphology of sex chromosomes was reported by
<bibRefCitation id="EF9D4B0A322DFFC7860AF8CA2DCBF88D" author="Yonenaga-Yassuda, Y. &amp; Prado, R. C. &amp; Mello, D. A." pageId="18" pageNumber="19" pagination="209 - 220" refId="ref76205" refString="Yonenaga-Yassuda, Y., Prado, R. C. &amp; Mello, D. A. (1987) Supernumerary chromosomes in Holochilus brasiliensis and comparative cytogenetic analysis with Nectomys squamipes (Cricetidae, Rodentia). Revista Brasileira de Genetica, 2, 209 - 220." type="journal article" year="1987">
Yonenaga-Yassuda
<emphasis id="B978EAE9322DFFC7822DF8F62DAEF88D" box="[339,389,1840,1866]" italics="true" pageId="18" pageNumber="19">et al</emphasis>
. (1987)
</bibRefCitation>
, a subtelocentric X and a submetacentric Y. These authors also reported the presence of one or two large submetacentric B chromosomes. C-banding metaphases exhibited blocks of constitutive heterochromatin on the pericentromeric region of all autosomes. The X chromosome presented constitutive heterochromatin on the pericentromeric region and on the short arm, while the Y chromosome was completely heterochromatic. The B chromosomes presented heterochromatic blocks on the pericentromeric region and on both arms (
<bibRefCitation id="EF9D4B0A322DFFC6864CF8072CDCFF76" author="Freitas, T. R. O. &amp; Mattevi, M. S. &amp; Oliveira, L. F. B. &amp; Souza, M. J. &amp; Yonenaga-Yassuda, Y. &amp; Salzano, F. M." lastPageId="19" lastPageNumber="20" pageId="18" pageNumber="19" pagination="13 - 20" refId="ref66921" refString="Freitas, T. R. O., Mattevi, M. S., Oliveira, L. F. B., Souza, M. J., Yonenaga-Yassuda, Y. &amp; Salzano, F. M. (1983) Chromosome relationships in three representatives of the genus Holochilus (Rodentia, Cricetidae) from Brazil. Genetica, 61, 13 - 20. https: // doi. org / 10.1007 / BF 00563228" type="journal article" year="1983">
Freitas
<emphasis id="B978EAE9322DFFC686F6F8062C86FF76" italics="true" lastPageId="19" lastPageNumber="20" pageId="18" pageNumber="19">et al</emphasis>
. 1983
</bibRefCitation>
;
<bibRefCitation id="EF9D4B0A322CFFC6827CFF502E70FF76" author="Yonenaga-Yassuda, Y. &amp; Prado, R. C. &amp; Mello, D. A." box="[258,603,151,177]" pageId="19" pageNumber="20" pagination="209 - 220" refId="ref76205" refString="Yonenaga-Yassuda, Y., Prado, R. C. &amp; Mello, D. A. (1987) Supernumerary chromosomes in Holochilus brasiliensis and comparative cytogenetic analysis with Nectomys squamipes (Cricetidae, Rodentia). Revista Brasileira de Genetica, 2, 209 - 220." type="journal article" year="1987">
Yonenaga-Yassuda
<emphasis id="B978EAE9322CFFC682A0FF502E3BFF76" box="[478,528,151,177]" italics="true" pageId="19" pageNumber="20">et al</emphasis>
. 1987
</bibRefCitation>
). G- and R-banding were also performed (
<bibRefCitation id="EF9D4B0A322CFFC68744FF502928FF76" author="Baker, R. J. &amp; Koop, B. F. &amp; Haiduk, M. W." box="[1082,1283,151,177]" pageId="19" pageNumber="20" pagination="403 - 416" refId="ref64229" refString="Baker, R. J., Koop, B. F. &amp; Haiduk, M. W. (1983) Resolving systematic relationships with G-bands: a study of five genera of South American Cricetine rodents. Systematic zoology, 32 (4), 403 - 416. https: // doi. org / 10.2307 / 2413167" type="journal article" year="1983">
Baker
<emphasis id="B978EAE9322CFFC687F9FF502892FF76" box="[1159,1209,151,177]" italics="true" pageId="19" pageNumber="20">et al</emphasis>
. 1983
</bibRefCitation>
;
<bibRefCitation id="EF9D4B0A322CFFC68671FF502CF9FF12" author="Freitas, T. R. O. &amp; Mattevi, M. S. &amp; Oliveira, L. F. B. &amp; Souza, M. J. &amp; Yonenaga-Yassuda, Y. &amp; Salzano, F. M." pageId="19" pageNumber="20" pagination="13 - 20" refId="ref66921" refString="Freitas, T. R. O., Mattevi, M. S., Oliveira, L. F. B., Souza, M. J., Yonenaga-Yassuda, Y. &amp; Salzano, F. M. (1983) Chromosome relationships in three representatives of the genus Holochilus (Rodentia, Cricetidae) from Brazil. Genetica, 61, 13 - 20. https: // doi. org / 10.1007 / BF 00563228" type="journal article" year="1983">
Freitas
<emphasis id="B978EAE9322CFFC6861DFF5029BEFF76" box="[1379,1429,151,177]" italics="true" pageId="19" pageNumber="20">et al</emphasis>
. 1983
</bibRefCitation>
;
<bibRefCitation id="EF9D4B0A322CFFC683A3FF7C2E18FF12" author="Yonenaga-Yassuda, Y. &amp; Prado, R. C. &amp; Mello, D. A." box="[221,563,187,213]" pageId="19" pageNumber="20" pagination="209 - 220" refId="ref76205" refString="Yonenaga-Yassuda, Y., Prado, R. C. &amp; Mello, D. A. (1987) Supernumerary chromosomes in Holochilus brasiliensis and comparative cytogenetic analysis with Nectomys squamipes (Cricetidae, Rodentia). Revista Brasileira de Genetica, 2, 209 - 220." type="journal article" year="1987">
Yonenaga-Yassuda
<emphasis id="B978EAE9322CFFC682C6FF7C2DC2FF12" box="[440,489,187,213]" italics="true" pageId="19" pageNumber="20">et al</emphasis>
. 1987
</bibRefCitation>
). Multiple NORs, varying from six to fourteen were localized at the telomeric regions of the short arms of small autosomes (
<bibRefCitation id="EF9D4B0A322CFFC681E5FF182FD8FF3E" author="Yonenaga-Yassuda, Y. &amp; Prado, R. C. &amp; Mello, D. A." box="[667,1011,223,249]" pageId="19" pageNumber="20" pagination="209 - 220" refId="ref76205" refString="Yonenaga-Yassuda, Y., Prado, R. C. &amp; Mello, D. A. (1987) Supernumerary chromosomes in Holochilus brasiliensis and comparative cytogenetic analysis with Nectomys squamipes (Cricetidae, Rodentia). Revista Brasileira de Genetica, 2, 209 - 220." type="journal article" year="1987">
Yonenaga-Yassuda
<emphasis id="B978EAE9322CFFC68006FF182F82FF3E" box="[888,937,223,249]" italics="true" pageId="19" pageNumber="20">et al</emphasis>
. 1987
</bibRefCitation>
).
</paragraph>
</subSubSection>
<subSubSection id="C3166570322CFFC683B9FEC42FFFFD42" pageId="19" pageNumber="20" type="description">
<paragraph id="8BB336FB322CFFC683B9FEC42FFFFD42" blockId="19.[151,1437,151,645]" pageId="19" pageNumber="20">
Supernumerary chromosomes of
<taxonomicName id="4C0C4D78322CFFC6813DFEC42EEFFEDB" baseAuthorityName="Wagner" baseAuthorityYear="1842" box="[579,708,259,284]" class="Mammalia" family="Muridae" genus="Holochilus" kingdom="Animalia" order="Rodentia" pageId="19" pageNumber="20" phylum="Chordata" rank="species" species="sciureus">
<emphasis id="B978EAE9322CFFC6813DFEC42EEFFEDB" box="[579,708,259,284]" italics="true" pageId="19" pageNumber="20">H. sciureus</emphasis>
</taxonomicName>
were isolated by flow-sorted and used as probe for understand the origin of B chromosomes in tribe
<taxonomicName id="4C0C4D78322CFFC68143FEE02EE3FE86" box="[573,712,295,321]" class="Mammalia" family="Cricetidae" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="19" pageNumber="20" phylum="Chordata" rank="tribe" tribe="Oryzomyini">Oryzomyini</taxonomicName>
.
<emphasis id="B978EAE9322CFFC681ADFEE02F32FE87" box="[723,793,295,320]" italics="true" pageId="19" pageNumber="20">In situ</emphasis>
hybridization of Bs and sex chromosomes of
<taxonomicName id="4C0C4D78322CFFC68660FEE029B7FE87" baseAuthorityName="Wagner" baseAuthorityYear="1842" box="[1310,1436,295,320]" class="Mammalia" family="Muridae" genus="Holochilus" kingdom="Animalia" order="Rodentia" pageId="19" pageNumber="20" phylum="Chordata" rank="species" species="sciureus">
<emphasis id="B978EAE9322CFFC68660FEE029B7FE87" box="[1310,1436,295,320]" italics="true" pageId="19" pageNumber="20">H. sciureus</emphasis>
</taxonomicName>
were performed on metaphases of 15 species of
<taxonomicName id="4C0C4D78322CFFC681BAFE8C2F65FEA2" box="[708,846,331,357]" class="Mammalia" family="Cricetidae" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="19" pageNumber="20" phylum="Chordata" rank="tribe" tribe="Oryzomyini">Oryzomyini</taxonomicName>
, five of which had Bs. The results revealed that 12 of the species sampled, all belonging to a monophyletic
<taxonomicName id="4C0C4D78322CFFC6806AFEA82FB0FE4E" box="[788,923,367,393]" class="Mammalia" family="Cricetidae" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="19" pageNumber="20" phylum="Chordata" rank="tribe" tribe="Oryzomyini">Oryzomyini</taxonomicName>
subclade (clade C and D, recovered by Weksler 2006), were positive for an anonymous Oryzomyini shared heterochromatic region (OSHR) on the X and Y chromosomes. The OSHR was also present on Bs of
<taxonomicName id="4C0C4D78322CFFC68198FE702F48FE17" baseAuthorityName="Wagner" baseAuthorityYear="1842" box="[742,867,439,464]" class="Mammalia" family="Muridae" genus="Holochilus" kingdom="Animalia" order="Rodentia" pageId="19" pageNumber="20" phylum="Chordata" rank="species" species="sciureus">
<emphasis id="B978EAE9322CFFC68198FE702F48FE17" box="[742,867,439,464]" italics="true" pageId="19" pageNumber="20">H. sciureus</emphasis>
</taxonomicName>
,
<taxonomicName id="4C0C4D78322CFFC6800FFE70280DFE17" baseAuthorityName="Pelzeln" baseAuthorityYear="1883" box="[881,1062,439,464]" class="Mammalia" family="Muridae" genus="Nectomys" kingdom="Animalia" order="Rodentia" pageId="19" pageNumber="20" phylum="Chordata" rank="species" species="rattus">
<emphasis id="B978EAE9322CFFC6800FFE70280DFE17" box="[881,1062,439,464]" italics="true" pageId="19" pageNumber="20">Nectomys rattus</emphasis>
</taxonomicName>
, and
<taxonomicName id="4C0C4D78322CFFC6871DFE7028D2FE17" baseAuthorityName="Brants" baseAuthorityYear="1827" box="[1123,1273,439,464]" class="Mammalia" family="Muridae" genus="Nectomys" kingdom="Animalia" order="Rodentia" pageId="19" pageNumber="20" phylum="Chordata" rank="species" species="squamipes">
<emphasis id="B978EAE9322CFFC6871DFE7028D2FE17" box="[1123,1273,439,464]" italics="true" pageId="19" pageNumber="20">N. squamipes</emphasis>
</taxonomicName>
, but not on Bs of
<taxonomicName id="4C0C4D78322CFFC683C8FE1C2DE6FE32" baseAuthorityName="Waterhouse" baseAuthorityYear="1837" box="[182,461,475,501]" class="Mammalia" family="Muridae" genus="Oligoryzomys" kingdom="Animalia" order="Rodentia" pageId="19" pageNumber="20" phylum="Chordata" rank="species" species="flavescens">
<emphasis id="B978EAE9322CFFC683C8FE1C2DE6FE32" box="[182,461,475,501]" italics="true" pageId="19" pageNumber="20">Oligoryzomys flavescens</emphasis>
</taxonomicName>
, and
<taxonomicName id="4C0C4D78322CFFC68172FE1C2EDDFE33" baseAuthorityName="Fischer" baseAuthorityYear="1814" box="[524,758,475,501]" class="Mammalia" family="Cricetidae" genus="Sooretamys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="19" pageNumber="20" phylum="Chordata" rank="species" species="angouya">
<emphasis id="B978EAE9322CFFC68172FE1C2EDDFE33" box="[524,758,475,501]" italics="true" pageId="19" pageNumber="20">Sooretamys angouya</emphasis>
</taxonomicName>
. Two distinct additional OSHR/autosome associations were observed on
<taxonomicName id="4C0C4D78322CFFC68258FE382D89FDDF" baseAuthorityName="Fischer" baseAuthorityYear="1814" box="[294,418,511,537]" class="Mammalia" family="Cricetidae" genus="Sooretamys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="19" pageNumber="20" phylum="Chordata" rank="species" species="angouya">
<emphasis id="B978EAE9322CFFC68258FE382D89FDDF" box="[294,418,511,537]" italics="true" pageId="19" pageNumber="20">S. angouya</emphasis>
</taxonomicName>
. According to the authors, the OSHR possibly arose 3.0 to 7.8 million years ago on the sex chromosomes of an ancestral species and spread through the action of transposable elements. These results suggest that the diversity of
<taxonomicName id="4C0C4D78322CFFC682FEFD802E05FDA6" authority="Bs" authorityName="Bs" box="[384,558,583,609]" class="Mammalia" family="Cricetidae" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="19" pageNumber="20" phylum="Chordata" rank="tribe" tribe="Oryzomyini">Oryzomyini Bs</taxonomicName>
in number, size, morphology, and genetic content may be explained by their independent origin in different subgroups of species (Ventura
<emphasis id="B978EAE9322CFFC68032FDAC2F56FD42" box="[844,893,619,645]" italics="true" pageId="19" pageNumber="20">et al</emphasis>
. 2015).
</paragraph>
</subSubSection>
</treatment>
</document>