High-resolution GTG-banding patterns of dog and silver fox chromosomes: description and comparative analysis

The GTG-banding patterns and ideograms of two canid species, the domestic dog and the silver fox, are presented and compared. For both species the number of bands visualized has increased to well over 400. A standard dog karyotype is proposed.

Localization of ESD and A2M genes to sheep chromosome 3 by in situ hybridization

The genes encoding esterase D (ESD) and alpha 2-macroglobulin (A2M) were mapped using 3H-labeled cDNAs to sheep chromosome 3p26-->p24 and 3q26-->q35 respectively.

Constitutive heterochromatin in early embryogenesis of Drosophila melanogaster

The formation of constitutive heterochromatin was studied during the embryonic development of Drosophila melanogaster, using the C-banding technique. During embryonic cleavage, C-banded material is not seen in mitotic chromosomes; the differentiation between euchromatin and heterochromatin only occurs at blastoderm. This event correlates with the establishment of position-effect variegation.

Mapping of the silver fox genes: assignments of the genes for ME1, ADK, PP, PEPA, GSR, MPI, and GOT1

Evidence is presented for the assignment of seven fox genes on the basis of the segregation data for chromosomes and enzymes of fox x Chinese hamster somatic cell hybrids. The chromosomal loci of the following enzyme genes were determined: ME1, VFU1; ADK and PP, VFU4; PEPA, VFU5; GSR, VFU7; and MPI and GOT1, VFU15. The localization of these genes now extends the fox genetic map to 22 mapped genes. Based on comparative analysis of mammalian genetic maps, karyotype evolution in Carnivora is discussed.