Analysis of repetitive DNA distribution patterns in the Tribolium castaneum genome

Table 1 Abundance and average density of microsatellites, minisatellites and satellites in the D. melanogaster and T. castaneum genomes identified by TRF

	Number of base pairs	Percentage of genome	Number of loci	Average density* (loci/Mb)
Tribolium
Microsatellites	591,105	0.4	17,328	114
Minisatellites	3,112,304	2.1	120,474	796
Satellites	3,775,523	2.5	4,272	28
Total tandem repeats	7,478,923	4.9	142,074	939
Genome	151,333,735
*Drosophila*
Microsatellites	1,442,241	1.0	52,906	367
Minisatellites	3,590,753	2.5	126,237	876
Satellites	1,075,701	0.7	1,343	9
Total tandem repeats	6,108,695	4.2	180,486	1,253
Genome	143,955,363^†

*For the Tribolium genome, average density = number of repeats/151 Mb; for the Drosophila genome, average density = number of repeats/144 Mb. ^†The size of the Drosophila genome was calculated by summing the euchromatin (124,006,872 bp) and heterochromatin (19,948,491 bp) not including sequence gaps.

ISSN: 1474-760X