BANDING ANALYSIS OF THE CHROMOSOMES OF <i>MARMOSA MITIS</i> (MURINE OPOSSUM)

Curcuru-Giordano, Frances M.; Weed, Richard G.; Jenkins, Edmund C.

doi:10.1139/g74-003

Cited by 10 publications

(8 citation statements)

References 13 publications

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“…Curcuru- Giordano et al (1974) identified all the chromosomes of Marmosa mitis (2n = 14) by Q-banding and showed that one X chromosome was consistently heterochromatic using the ASG technique.…”

Section: Introductionmentioning

confidence: 99%

Constitutive heterochromatin, G-bands and nucleolus-organizer regions in four species of Didelphidae (Marsupialia)

et al. 1982

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Chromosomes of Didelphis atbiventris, D. marsupialis, Philander opossum and Lutreolina crassicaudata,four species of marsupials with very similar karyotypes and 2n = 22 were studied. All the chromosomes were acrocentrics except the X in L. crassicaudata, which is a metacentric.The G-band patterns of these species are similar but the distribution of constitutive heterochromatin differs among them as shown by C-banding. The hypothesis that the X in L. crassicaudata might be an isochromosome derived from the acrocentric X in the other species is discarded since G-and C-banding patterns differ in the two arms.In D. marsupialis the Ag-NORs are terminal and located in both arms of one pair and in the long arms of two pairs of medium-sized autosomes. In P. opossum the NOR-bearing chromosomes could be precisely identified through simultaneous silver staining and G-banding. ]'he Ag-NORs are terminal and located at the short arm of pair 5 and the long arm of pair 7.

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Section: Introductionmentioning

confidence: 99%

Constitutive heterochromatin, G-bands and nucleolus-organizer regions in four species of Didelphidae (Marsupialia)

et al. 1982

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“…Y chromosome elimination from the bone marrow of man (Pierre and Hoagland 1972) or fibroblasts of Marmosa mitis (Curcuru-Giordano et al 1974) involves only a proportion of the cells in the tissue and, at least for man, the elimination appears to be a function of ageing (Pierre and Hoagland 1972). The system in M. mitis would appear to be unrelated as Y chromosome loss was observed in 14 out of 129 cells in cultured fibroblasts while in the greater glider elimination from ear-and heart-derived fibroblasts did not occur.…”

Section: Y Chromosome Eliminationmentioning

confidence: 97%

“…Amongst eutherian mammals X chromosome elimination from some female somatic tissues occurs in Akodon azarae, Acomys selousiand Choloepus hoffmani, while somatic elimination of one X chromosome of fefl}ales and of the single X of male germ cells occurs in Microtus oregoni [see White (1973) for review and references]. Y chromosome elimination has been reported to occur in some cells from somatic tissues in man (Pierre and Hoagland 1972) and murine opossum, Marmosa mitis (Curcuru-Giordano et al 1974).…”

Section: Introductionmentioning

confidence: 99%

Studies on Metatherian Sex Chromosomes. IX. Sex Chromosomes of the Greater Glider (Marsupialia : Petauridae)

Murray¹,

Mckay²,

Sharman³

1979

Aust. Jnl. Of Bio. Sci.

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The greater glider, currently but incorrectly known as Schoinobates vo/ans, is widely distributed in forested regions in eastern Australia. All animals studied from six different localities had 20 autosomes but there were four chromosomally distinct populations. At Royal National Park, N.S.W., all female greater gliders studied had 22 chromosomes including two large submetacentric X chromosomes with subterminal secondary constrictions in their longer arms. This form of X chromosome occurred also at Bondo State Forest, Myall Lakes and Coff's Harbour, N.S.W., and at Eidsvold, Qld. At Coomooboolaroo, Qld, the X chromosome was also a large submetacentric but a secondary constriction occurred in the shorter arm. Two chromosomally distinct types apparently occur in Royal National Park, one with XY m,ales as in all other populations, and one with XY1Y2 males. Y or Yb but not Y 2, chromosomes were eliminated from the bone marrow in all populations but were present in spermatogonia, primary sperrnatocytes and cultured fibroblasts. Animals from Bondo State Forest had three or more acrocentric or metacentric supernumerary chromosomes.

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“…Multiple short-term phytohemagglutinin (PHA)-stimulated peripheral blood cultures, which were repeated at different times, as well as skin fibroblast-like culture consistently exhibited the presence of a 12q + marker chromosome in cells from the proposita. Mononuclear leucocyte and skin cells were cultured according to procedures previously reported by Dutkowski et al (1983) and Curcuru-Giordano et al (1974). A total of 1 17 cells were analyzed from PHA cultures while 50 were studied from dermal fibroblasts.…”

Section: Cytogenetic and Gene Dosage Studiesmentioning

confidence: 99%

Atypical Down syndrome and partial trisomy 21

et al. 2008

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A case of “atypical” Down Syndrome (DS), where the proposita did not exhibit all of the clinical features of DS and had de novo partial trisomy 21, was studied. Results from phenotypic, chromosome banding and superoxide dismutase (SOD) gene dosage studies suggest a karyotype of 46,XX,‐12, + t(12pter to 12qter::21q21 to 21q22.?2). Additional studies of such atypical cases will provide more precise sublocalization for both gene and phenotypic mapping of the bands that are responsible for the DS phenotype.

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BANDING ANALYSIS OF THE CHROMOSOMES OF MARMOSA MITIS (MURINE OPOSSUM)

Cited by 10 publications

References 13 publications

Constitutive heterochromatin, G-bands and nucleolus-organizer regions in four species of Didelphidae (Marsupialia)

Constitutive heterochromatin, G-bands and nucleolus-organizer regions in four species of Didelphidae (Marsupialia)

Studies on Metatherian Sex Chromosomes. IX. Sex Chromosomes of the Greater Glider (Marsupialia : Petauridae)

Atypical Down syndrome and partial trisomy 21

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