Population genomics of the endangered giant Galápagos tortoise. (Registro nro. 13061)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 02511nab a22003257a 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | EC-PaCDF |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20171204141423.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 170725t20132013xxu|||||||||||||||||eng|| |
| 040 ## - CATALOGING SOURCE | |
| Original cataloging agency | EC-PaCDF |
| 041 ## - LANGUAGE CODE | |
| Language code of text/sound track or separate title | eng |
| 082 04 - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Edition number | 21 |
| Classification number | 597.9246 |
| 100 1# - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Loire, Etienne. |
| 245 10 - TITLE STATEMENT | |
| Title | Population genomics of the endangered giant Galápagos tortoise. |
| 520 0# - SUMMARY, ETC. | |
| Summary, etc. | Background: The giant Galápagos tortoise, Chelonoidis nigra, is a large-sized terrestrial chelonian of high patrimonial interest. The species recently colonized a small continental archipelago, the Galápagos Islands, where it has been facing novel environmental conditions and limited resource availability. To explore the genomic consequences of this ecological shift, we analyze the transcriptomic variability of five individuals of C. nigra,andcompareittosimilar data obtained from several continental species of turtles.<br/>Results: Having clarified the timing of divergence in the Chelonoidis genus,wereportinC. nigra averylowlevelof genetic polymorphism, signatures of a weakened efficacy of purifying selection, and an elevated mutation load in coding and regulatory sequences. These results are consistent with the hypothesis of an extremely low long-term effective population size in this insular species. Functional evolutionary analyses reveal a reduced diversity of immunity genes in C. nigra, in line with the hypothesis of attenuated pathogen diversity in islands, and an increased selective pressure on genes involved in response to stress, potentially related to the climatic instability of its environment and its elongated lifespan. Finally, we detect no population structure or homozygosity excess in our five-individual sample.<br/>Conclusions: These results enlighten the molecular evolution of an endangered taxon in a stressful environment and point to island endemic species as a promising model for the study of the deleterious effects on genome evolution of a reduced long-term population size.<br/> |
| 546 ## - LANGUAGE NOTE | |
| Language note | English |
| 653 ## - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Giant tortoise. |
| 653 ## - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Tortugas Gigantes. |
| 653 ## - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Galapagos. |
| 653 ## - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Chelonoidis nigra. |
| 653 ## - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Endangered. |
| 653 ## - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Peligro de extinción. |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Chiari, Ylenia. |
| 9 (RLIN) | 2256 |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Bernard, Aurélien. |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Cahais, Vincent. |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Romiguier, Jonathan. |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Lourenço, Joao Miguel. |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Galtier, Nicolas. |
| 773 0# - HOST ITEM ENTRY | |
| Related parts | Vol. 14 (2013), p. 1-11 |
| Title | Genome Biology. |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Dewey Decimal Classification |
| Koha item type | Artículo |
| Withdrawn status | Source of classification or shelving scheme | Damaged status | Not for loan | Collection code | Home library | Current library | Shelving location | Date acquired | Total Checkouts | Full call number | Barcode | Date last seen | Price effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dewey Decimal Classification | Galápagos | Corley Smith Library | Corley Smith Library | Artículos | 25/07/2017 | 597.9246 LOI | 2017-2146 | 25/07/2017 | 25/07/2017 | Artículo | ||||
| Dewey Decimal Classification | Galápagos | Corley Smith Library | Corley Smith Library | Colección PDF | 25/07/2017 | 597.9246 LOI 2013 | 2021-1831 | 25/07/2017 | 25/07/2017 | Documento electrónico |