A new variant of chromosome 1 in the house mouse
Agul'nik, S.I.; Gorlov, I.P.; Agul'nik, A.I.
Tsitologiia 30(6): 773-776
1988
ISSN/ISBN: 0041-3771 PMID: 3176181 Document Number: 306519
In wild mouse populations of Siberia, animals with a new variant of chromosome 1 were found. The total length of this chromosome was 1.3 times as great as the normal homologue. The G-banding technique revealed two additional insertions Is(HSR; 1C5)1Icg and Is(HSR; 1E3)2Icg located between bands 1C5 and 1D, and 1E3 and 1E4, resp. The C-banding of both the insertions was positive and lighter than that of the centromeric heterochromatin. The size of each insertion was approximately 15% of new variant of chromosome 1. No meiotic disturbances were found in heterozygous male mice. Chromosome 1 with insertions has been introduced into the laboratory mouse stock.