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The reduction of genic activity in the tetraploid amphibianOdontophrynus americanusis not due to loss of ribosomal DNA

Authors :
Schmidtke, J.
Beçak, W.
Engel, W.
Source :
Experientia; January 1976, Vol. 32 Issue: 1 p27-28, 2p
Publication Year :
1976

Abstract

Genic activity in tetraploid members of the amphibian speciesOdontophrymus americanusis reduced to that of diploid ones. Loss of ribosomal genes, a mechanism suggested by others as a means of decreasing genetic activity, could be ruled out. The diploids and the tetraploids have almost identical proportions of their genomes complementary to (28s+18s) ribosomal RNA.

Details

Language :
English
ISSN :
00144754
Volume :
32
Issue :
1
Database :
Supplemental Index
Journal :
Experientia
Publication Type :
Periodical
Accession number :
ejs16518595
Full Text :
https://doi.org/10.1007/BF01932605