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| Content Provider | Springer Nature Link |
|---|---|
| Author | Salzburger, Walter Steinke, Dirk Braasch, Ingo Meyer, Axel |
| Copyright Year | 2009 |
| Abstract | The evolution of genome size as well as structure and organization of genomes belongs among the key questions of genome biology. Here we show, based on a comparative analysis of 30 genomes, that there is generally a tight correlation between the number of genes per chromosome and the length of the respective chromosome in eukaryotic genomes. The surprising exceptions to this pattern are placental mammalian genomes. We identify the number and, more importantly, the uneven distribution of gene deserts among chromosomes, i.e., long (>500 kb) stretches of DNA that do not encode for genes, as the main contributing factor for the observed anomaly of eutherian genomes. Gene-rich placental mammalian chromosomes have smaller proportions of gene deserts and vice versa. We show that the uneven distribution of gene deserts is a derived character state of eutherians. The functional and evolutionary significance of this particular feature of eutherian genomes remains to be explained. |
| Starting Page | 207 |
| Ending Page | 216 |
| Page Count | 10 |
| File Format | |
| ISSN | 00222844 |
| Journal | Journal of Molecular Evolution |
| Volume Number | 69 |
| Issue Number | 3 |
| e-ISSN | 14321432 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2009-07-01 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Genome evolution Gene deserts Genome size Mammalia Animal Genetics and Genomics Plant Genetics & Genomics Plant Sciences Microbiology Evolutionary Biology Cell Biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Genetics Molecular Biology Ecology, Evolution, Behavior and Systematics |
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