Sex-chromosome constitution and supernumerary chromosome in the large bandicoot rat, Bandicota indica (Rodentia, Muridae) from Peninsular Malaysia
The Peninsular Malaysia taxon of Bandicota indica has a standard complement of 44 chromosomes, with medium-sized subacrocentric X and small submetacentric Y chromosomes. The present study reveals variation in the size and morphology of the X-xhromosome in B. indica with 2n = 44. The difference in si...
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| Main Authors: | , , |
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| Format: | Article |
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Akademi Sains Malaysia & Confederation of Scientific & Technological Association in Malaysia (COSTAM)
2012
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| Subjects: | |
| Online Access: | http://eprints.um.edu.my/13280/ http://www.costam.org.my/publications/Vol%208%20No%201%20June%202012.pdf |
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| Summary: | The Peninsular Malaysia taxon of Bandicota indica has a standard complement of 44 chromosomes, with medium-sized subacrocentric X and small submetacentric Y chromosomes. The present study reveals variation in the size and morphology of the X-xhromosome in B. indica with 2n = 44. The difference in size of the X-chromosome is attributed to variation in constitutive heterochromatin. Excepting the X-chromosome, the karyotype of the Malaysian taxon is similar to the Indian B. indica nemorivaga with 2n = 44. It differs from the Thailand taxon in the number of biarmed and uniarmed autosomes. A male specimen (with 45 chrosomes) of the Malaysian taxon possessed a supernumerary (B) chromosome which is identical to that reported in B. indica nemorivaga. |
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