Reduced meiotic fitness in hybrids with heterozygosity for heterochromatin in the speciating Mus terricolor complex.

Simple item page
dc.contributor.authorSharma, Tikaramen_US
dc.contributor.authorBardhan, Amiten_US
dc.contributor.authorBahadur, Minen_US
dc.date.accessioned2003-03-25en_US
dc.date.accessioned2009-06-01T14:13:12Z
dc.date.available2003-03-25en_US
dc.date.available2009-06-01T14:13:12Z
dc.date.issued2003-03-25en_US
dc.description.abstractMus terricolor I, II and III are the three chromosomal species which differ in stable autosomal short-arm heterochromatin variations established in homozygous condition. Analysis of meiosis in the laboratory-generated F1 male hybrids from crosses (both ways) between M. terricolor I and II and between M. terricolor I and III shows high frequencies of pairing abnormalities at pachytene. The backcross (N3 generation) male hybrids between M. terricolor I and II have meiotic abnormalities as in the F1 male hybrids, though to a lesser extent. They show difference in pairing abnormalities in the different karyotypic forms; the backcross hybrids heterozygous for the heterochromatic short arms have more anomalies compared to the homokaryotypic hybrids. This suggests a negative influence of the heterochromatin heterozygosity in meiotic pairing. The results indicate a role for heterochromatin variations in the development of a reproductive barrier in the speciating M. terricolor complex.en_US
dc.description.affiliationCytogenetics Laboratory, Department of Zoology, Banaras Hindu University, Varanasi 221 005, India. tsharma123@yahoo.co.inen_US
dc.identifier.citationSharma T, Bardhan A, Bahadur M. Reduced meiotic fitness in hybrids with heterozygosity for heterochromatin in the speciating Mus terricolor complex. Journal of Biosciences. 2003 Mar; 28(2): 189-98en_US
dc.identifier.urihttps://imsear.searo.who.int/handle/123456789/110673
dc.language.isoengen_US
dc.source.urihttps://www.ias.ac.in/jbiosci/index.htmlen_US
dc.subject.meshAnimalsen_US
dc.subject.meshFemaleen_US
dc.subject.meshHeterochromatin --geneticsen_US
dc.subject.meshHeterozygoteen_US
dc.subject.meshKaryotypingen_US
dc.subject.meshMaleen_US
dc.subject.meshMeiosis --geneticsen_US
dc.subject.meshMice --geneticsen_US
dc.titleReduced meiotic fitness in hybrids with heterozygosity for heterochromatin in the speciating Mus terricolor complex.en_US
dc.typeJournal Articleen_US
dc.typeResearch Support, Non-U.S. Gov'ten_US
Files
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.79 KB
Format:
Plain Text
Description:
Download
Collections
Journal of Biosciences