Lampbrush chromosomes of the Japanese quail (Coturnix coturnix japonica): A new version of cytogenetic maps

Lampbrush chromosomes of the Japanese quail (Coturnix coturnix japonica): A new version of... Avian oocyte chromosomes are transfomed into giant transcriptionally active lampbrush chromosomes (LBCs) at meiosis 1 diplotene. These chromosomes are a convenient tool for high-resulution cytogenetic analysis. Using differential staining with fluorochromes DAPI and CMA3, we have constructed detailed cytological maps for lampbrush macrochromosomes 1–5 and ZW of the Japanese quail Coturnix coturnix japonica. We also performed a comparative analysis of mitotic chromosomes and LBCs corresponding to them. We estimated the decondensation coefficient during LBC formation and determined the centromere indices for mitotic and diplotene chromosomes and thus found that different chromosomes and chromosomal regions demonstrate unequal degrees of decondensation. Russian Journal of Genetics Springer Journals

Lampbrush chromosomes of the Japanese quail (Coturnix coturnix japonica): A new version of cytogenetic maps

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SP MAIK Nauka/Interperiodica
Copyright © 2010 by Pleiades Publishing, Ltd.
Biomedicine; Microbial Genetics and Genomics; Animal Genetics and Genomics; Human Genetics
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