140 lines
18 KiB
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140 lines
18 KiB
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<mods:title id="4C045AA01D6AE7D0D9D839FCF7F7A3E4">A review on the cytogenetics of the tribe Oryzomyini (Rodentia: Cricetidae: Sigmodontinae), with the description of new karyotypes</mods:title>
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<mods:namePart id="6CE3B49A99E19A211F7D23D7C3338A37">Moreira, Camila Do Nascimento</mods:namePart>
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<mods:namePart id="8F46658F94DDF7EA055A3AB64B277787">Ventura, Karen</mods:namePart>
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<mods:namePart id="39F1BA45ECC9E3477A89A11B9DB06C8C">Percequillo, Alexandre Reis</mods:namePart>
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<mods:namePart id="BE2D9F0BA32A45E0BFFB5DCAC770EA05">Yonenaga-Yassuda, Yatiyo</mods:namePart>
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<mods:title id="62628188D4BF9AEF03A18633FAAB2EC4">Zootaxa</mods:title>
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<mods:date id="EEFD54C80FEE9A7BF32DE0CB4EF0DF5C">2020</mods:date>
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<treatment id="03A587ED326EFF8783E9FB192848FEDA" ID-DOI="http://doi.org/10.5281/zenodo.4566870" ID-GBIF-Taxon="179917857" ID-Zenodo-Dep="4566870" LSID="urn:lsid:plazi:treatment:03A587ED326EFF8783E9FB192848FEDA" httpUri="http://treatment.plazi.org/id/03A587ED326EFF8783E9FB192848FEDA" lastPageId="82" lastPageNumber="82" pageId="81" pageNumber="82">
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<subSubSection id="C3166570326EFF8483E9FB192EA5FB3E" box="[151,654,1246,1273]" pageId="81" pageNumber="82" type="nomenclature">
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<paragraph id="8BB336FB326EFF8483E9FB192EA5FB3E" blockId="81.[151,1437,1246,2029]" box="[151,654,1246,1273]" pageId="81" pageNumber="82">
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<heading id="D0FB8197326EFF8483E9FB192EA5FB3E" box="[151,654,1246,1273]" fontSize="11" level="2" pageId="81" pageNumber="82" reason="5">
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<taxonomicName id="4C0C4D78326EFF8483E9FB192EAEFB3F" baseAuthorityName="Allen & Chapman" baseAuthorityYear="1893" box="[151,645,1246,1273]" class="Mammalia" family="Muridae" genus="Zygodontomys" kingdom="Animalia" order="Rodentia" pageId="81" pageNumber="82" phylum="Chordata" rank="species" species="brevicauda">
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<emphasis id="B978EAE9326EFF8483E9FB192D94FB3F" box="[151,447,1246,1272]" italics="true" pageId="81" pageNumber="82">Zygodontomys brevicauda</emphasis>
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(
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<emphasis id="B978EAE9326EFF8482B1FB182EAEFB3F" box="[463,645,1246,1272]" italics="true" pageId="81" pageNumber="82">Z. b. brevicauda</emphasis>
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</taxonomicName>
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)
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<subSubSection id="C3166570326EFF8783B9FAC42848FEDA" lastPageId="82" lastPageNumber="83" pageId="81" pageNumber="82" type="description">
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<paragraph id="8BB336FB326EFF8783B9FAC42848FEDA" blockId="81.[151,1437,1246,2029]" lastBlockId="82.[151,1436,151,285]" lastPageId="82" lastPageNumber="83" pageId="81" pageNumber="82">
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Two different karyotypes were reported for
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<emphasis id="B978EAE9326EFF8481B8FAC42FA8FADB" box="[710,899,1282,1308]" italics="true" pageId="81" pageNumber="82">
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Z. b.
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<taxonomicName id="4C0C4D78326EFF848078FAC52FA8FADB" baseAuthorityName="Allen & Chapman" baseAuthorityYear="1893" box="[774,899,1282,1308]" class="Mammalia" family="Muridae" genus="Zygodontomys" kingdom="Animalia" order="Rodentia" pageId="81" pageNumber="82" phylum="Chordata" rank="species" species="brevicauda">brevicauda</taxonomicName>
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</emphasis>
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. Karyotype 1: 2n = 84 and FN = 116 or 118. Autosomal complement: one medium submetacentric pair, one medium subtelocentric pair, 18 small autosomal pairs, and 21 minute autosomal pairs. According to authors, due to the small size of most autosomes, it was hard to recognize the morphology of many of the chromosomal pairs, however based on the best-defined karyotypes the estimate of autosomal fundamental number as made of 116 or 118 arms. Sex chromosomes: X, a small subtelocentric; Y, a minute subtelocentric (
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<bibRefCitation id="EF9D4B0A326EFF84817BFA712EC6FA16" author="Kiblisky, P. & Lobig, I. & Reig, O. A." box="[517,749,1462,1489]" pageId="81" pageNumber="82" pagination="35" refId="ref68393" refString="Kiblisky, P., Lobig, I. & Reig, O. A. (1970) Estudio cromosomico en diversas poblaciones del raton Ilanero Zygodontomys microtinus Thomas. Acta Cientifica Venezolana, 21, 35." type="journal article" year="1970">
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Kiblisky
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<emphasis id="B978EAE9326EFF84810EFA702E88FA17" box="[624,675,1462,1488]" italics="true" pageId="81" pageNumber="82">et al</emphasis>
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. 1970
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</bibRefCitation>
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;
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<bibRefCitation id="EF9D4B0A326EFF848185FA712F9DFA16" author="Reig, O. A. & Aguilera, M. & Perez-Zapata, A." box="[763,950,1462,1489]" pageId="81" pageNumber="82" pagination="361 - 370" refId="ref72428" refString="Reig, O. A., Aguilera, M. & Perez-Zapata, A. (1990) Cytogenetics and karyosystematics of South American oryzomyine rodents (Cricetidae: Sigmodontinae) II. High numbered karyotypes and chromosomal heterogeneity in Venezuelan Zygodontomys. Zeitschrift fur Saugetierkunde, 55 (6), 361 - 370." type="journal article" year="1990">
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Reig
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<emphasis id="B978EAE9326EFF848046FA702F40FA17" box="[824,875,1462,1488]" italics="true" pageId="81" pageNumber="82">et al</emphasis>
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. 1990
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</bibRefCitation>
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, pp. 363,
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<figureCitation id="13372A7E326EFF848756FA712845FA16" box="[1064,1134,1462,1489]" captionStart="FIGURE 2" captionStartId="7.[151,250,1191,1215]" captionTargetBox="[159,1426,281,1162]" captionTargetId="figure-69@7.[151,1436,273,1168]" captionTargetPageId="7" captionText="FIGURE 2. Distribution of diploid and fundamental number of karyotyped specimens of genus Cerradomys. (□) C. akroai; (■) C. goytaca; (ê) C. langguthi; (r) C. maracajuensis; (▲) C. marinhus; (○) C. scotti; (☆) C. subflavus; (l) C. vivoi." figureDoi="http://doi.org/10.5281/zenodo.4423619" httpUri="https://zenodo.org/record/4423619/files/figure.png" pageId="81" pageNumber="82">Fig. 2</figureCitation>
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). A secondary constriction was observed at one small autosomal pair. C-banding metaphases exhibited blocks of constitutive heterochromatin on the pericentromeric region of almost all chromosomes, the medium metacentric and submetacentric pairs lack a striking heterochromatic region, five small autosomal pairs exhibit both pericentromeric and terminal heterochromatic block, three small to minute autosomal pairs presented the small arm entirely heterochromatic, five minute autosomal pairs were entirely heterochromatic, all the remaining autosomal pairs showed different degrees of Cband on the pericentromeric regions. The X chromosome presented a pericentromeric heterochromatic block, and the banding pattern of the Y chromosome was not clearly defined. According to authors, the heterochromatic nature of some short arms, may be responsible for polymorphic variants in the morphology of several autosomes among different individuals (
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<bibRefCitation id="EF9D4B0A326EFF8482F1F93D2E7BF8D2" author="Reig, O. A. & Aguilera, M. & Perez-Zapata, A." box="[399,592,1786,1813]" pageId="81" pageNumber="82" pagination="361 - 370" refId="ref72428" refString="Reig, O. A., Aguilera, M. & Perez-Zapata, A. (1990) Cytogenetics and karyosystematics of South American oryzomyine rodents (Cricetidae: Sigmodontinae) II. High numbered karyotypes and chromosomal heterogeneity in Venezuelan Zygodontomys. Zeitschrift fur Saugetierkunde, 55 (6), 361 - 370." type="journal article" year="1990">
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Reig
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<emphasis id="B978EAE9326EFF8482B1F93C2E28F8D3" box="[463,515,1786,1812]" italics="true" pageId="81" pageNumber="82">et al</emphasis>
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||
. 1990
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||
</bibRefCitation>
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||
). Karyotype 2: 2n = 88 and FN = 116–118. Autosomal complement: one medium submetacentric pair, one medium subtelocentric pair, 18 small autosomal pairs, and 23 minute autosomal pairs. Sex chromosomes: X, a small subtelocentric; Y, a minute subtelocentric (
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<bibRefCitation id="EF9D4B0A326EFF84876AF885290AF89B" author="Gardner, A. L. & Patton, J. L." box="[1044,1313,1858,1885]" pageId="81" pageNumber="82" pagination="1 - 48" refId="ref67114" refString="Gardner, A. L. & 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 & Patton 1976</bibRefCitation>
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;
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<bibRefCitation id="EF9D4B0A326EFF848650F8842D6FF846" author="Perez-Zapata, A. & Aguilera, M. & Ferrer, A. & Reig, O. A." pageId="81" pageNumber="82" pagination="227" refId="ref71881" refString="Perez-Zapata, A., Aguilera, M., Ferrer, A. & Reig, O. A. (1984) El cariotipo de una poblacion de Zygodontomys sp. (Rodentia, Cricetidae) del Delta del Orinoco. Acta Cientifica Venezolana, 35, 227." type="journal article" year="1984">
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Perez-Zapata
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<emphasis id="B978EAE9326EFF8483B2F8A02CD7F847" box="[204,252,1894,1920]" italics="true" pageId="81" pageNumber="82">et al</emphasis>
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||
. 1984
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||
</bibRefCitation>
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||
;
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||
<bibRefCitation id="EF9D4B0A326EFF848231F8A12E28F846" author="Reig, O. A. & Aguilera, M. & Perez-Zapata, A." box="[335,515,1894,1921]" pageId="81" pageNumber="82" pagination="361 - 370" refId="ref72428" refString="Reig, O. A., Aguilera, M. & Perez-Zapata, A. (1990) Cytogenetics and karyosystematics of South American oryzomyine rodents (Cricetidae: Sigmodontinae) II. High numbered karyotypes and chromosomal heterogeneity in Venezuelan Zygodontomys. Zeitschrift fur Saugetierkunde, 55 (6), 361 - 370." type="journal article" year="1990">
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Reig
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<emphasis id="B978EAE9326EFF8482F4F8A02D90F847" box="[394,443,1894,1920]" italics="true" pageId="81" pageNumber="82">et al</emphasis>
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||
. 1990
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||
</bibRefCitation>
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||
, pp. 365,
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<figureCitation id="13372A7E326EFF848113F8A12E9AF846" box="[621,689,1894,1921]" captionStart="FIGURE 4" captionStartId="16.[151,250,1537,1561]" captionTargetBox="[151,1436,430,1507]" captionTargetId="figure-130@16.[151,1436,417,1514]" captionTargetPageId="16" captionText="FIGURE 4. Karyotype of Euryoryzomys sp., male with 2n = 58 and FN = 92. (A) Conventional staining (JAP 228); (B) C-banding (JAP 228); (C) G-banding (JAP 228); (D) Metaphase plate after fluorescent in situ hybridization with telomeric probe (left) and DAPI staining (right) (JAP 228), arrows indicate the hybridization of interstitial telomeric sequence." figureDoi="http://doi.org/10.5281/zenodo.4423625" httpUri="https://zenodo.org/record/4423625/files/figure.png" pageId="81" pageNumber="82">Fig. 4</figureCitation>
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). According to
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<bibRefCitation id="EF9D4B0A326EFF848025F8A1280BF846" author="Reig, O. A. & Aguilera, M. & Perez-Zapata, A." box="[859,1056,1894,1921]" pageId="81" pageNumber="82" pagination="361 - 370" refId="ref72428" refString="Reig, O. A., Aguilera, M. & Perez-Zapata, A. (1990) Cytogenetics and karyosystematics of South American oryzomyine rodents (Cricetidae: Sigmodontinae) II. High numbered karyotypes and chromosomal heterogeneity in Venezuelan Zygodontomys. Zeitschrift fur Saugetierkunde, 55 (6), 361 - 370." type="journal article" year="1990">
|
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Reig
|
||
<emphasis id="B978EAE9326EFF8480E8F8A02FEDF847" box="[918,966,1894,1920]" italics="true" pageId="81" pageNumber="82">et al</emphasis>
|
||
. (1990)
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</bibRefCitation>
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, the difference in diploid numbers of 2n = 84 and 2n = 88, that occurs in different localities of
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<collectingCountry id="F31B766B326EFF848042F84D2F84F863" box="[828,943,1930,1956]" name="Venezuela" pageId="81" pageNumber="82">Venezuela</collectingCountry>
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||
(
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<tableCitation id="C68E0340326EFF8480C0F84D2809F862" box="[958,1058,1930,1957]" captionStart="TABLE 11" captionStartId="83.[151,239,151,175]" captionTargetBox="[166,1416,227,1684]" captionText="TABLE 11. Karyotype data of genus Zygodontomys. Species, diploid (2n) and fundamental (FN) numbers, collection localities, geographic coordinates and reference." pageId="81" pageNumber="82">Table 11</tableCitation>
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,
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<figureCitation id="13372A7E326EFF848751F84D28AAF862" box="[1071,1153,1930,1957]" captionStart="FIGURE 22" captionStartId="82.[151,250,1227,1251]" captionTargetBox="[158,1429,315,1198]" captionTargetId="figure-85@82.[151,1436,309,1204]" captionTargetPageId="82" captionText="FIGURE 22. Distribution of diploid and fundamental number of karyotyped specimens of genus Zygodontomys. (l) Z. b. brevicauda; (■) Z. b. cherriei; (○) Z. b. microtinus; (ê) Zygodontomys sp. 1; (□) Zygodontomys sp. 2." figureDoi="http://doi.org/10.5281/zenodo.4423673" httpUri="https://zenodo.org/record/4423673/files/figure.png" pageId="81" pageNumber="82">Fig. 22</figureCitation>
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), were due to addition of two pairs of minute chromosomes. Besides, the metacentric and the submetacentric small pairs found in the 2n = 84 karyotype was lacking in the 2n = 88 karyotype. These differences can be easily explained by a Robertsonian rearrangement affecting two small pairs of the 2n = 84 karyotype. C-banding was performed and a great deal of the genome were C-band positive, although the small size and high number of chromosomes hampered efforts to obtain a clear metaphase. It was evident, however, that eleven very minute autosome pairs were entirely heterochromatic, and five small autosome pairs appear to be entirely heterochromatic (
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<bibRefCitation id="EF9D4B0A326DFF8780E0FEC4287DFEDA" author="Reig, O. A. & Aguilera, M. & Perez-Zapata, A." box="[926,1110,259,285]" pageId="82" pageNumber="83" pagination="361 - 370" refId="ref72428" refString="Reig, O. A., Aguilera, M. & Perez-Zapata, A. (1990) Cytogenetics and karyosystematics of South American oryzomyine rodents (Cricetidae: Sigmodontinae) II. High numbered karyotypes and chromosomal heterogeneity in Venezuelan Zygodontomys. Zeitschrift fur Saugetierkunde, 55 (6), 361 - 370." type="journal article" year="1990">
|
||
Reig
|
||
<emphasis id="B978EAE9326DFF8780A5FEC42827FEDA" box="[987,1036,259,285]" italics="true" pageId="82" pageNumber="83">et al</emphasis>
|
||
. 1990
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||
</bibRefCitation>
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||
).
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||
</paragraph>
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||
</subSubSection>
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</treatment>
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