| dc.creator |
González, Elena G. |
|
| dc.creator |
Zardoya, Rafael |
|
| dc.date |
2008-03-27T10:53:29Z |
|
| dc.date |
2008-03-27T10:53:29Z |
|
| dc.date |
2007-11-22 |
|
| dc.date.accessioned |
2017-01-31T01:01:09Z |
|
| dc.date.available |
2017-01-31T01:01:09Z |
|
| dc.identifier |
BMC Evolutionary Biology 7: 197 (2007) |
|
| dc.identifier |
1471-2148 |
|
| dc.identifier |
http://hdl.handle.net/10261/3330 |
|
| dc.identifier |
10.1186/1471-2148-7-197 |
|
| dc.identifier.uri |
http://dspace.mediu.edu.my:8181/xmlui/handle/10261/3330 |
|
| dc.description |
[Background] Marine pelagic fishes exhibit rather complex patterns of genetic differentiation,
which are the result of both historical processes and present day gene flow. Comparative multilocus
analyses based on both nuclear and mitochondrial genetic markers are probably the most
efficient and informative approach to discerning the relative role of historical events and life-history
traits in shaping genetic heterogeneity. The European sardine (Sardina pilchardus) is a small pelagic
fish with a relatively high migratory capability that is expected to show low levels of genetic
differentiation among populations. Previous genetic studies based on meristic and mitochondrial
control region haplotype frequency data supported the existence of two sardine subspecies (S. p.
pilchardus and S. p. sardina). |
|
| dc.description |
[Results] We investigated genetic structure of sardine among nine locations in the Atlantic Ocean
and Mediterranean Sea using allelic size variation of eight specific microsatellite loci. Bayesian
clustering and assignment tests, maximum likelihood estimates of migration rates, as well as
classical genetic-variance-based methods (hierarchical AMOVA test and RST pairwise comparisons)
supported a single evolutionary unit for sardines. These analyses only detected weak but significant
genetic differentiation, which followed an isolation-by-distance pattern according to Mantel test. |
|
| dc.description |
[Conclusion] We suggest that the discordant genetic structuring patterns inferred based on
mitochondrial and microsatellite data might indicate that the two different classes of molecular
markers may be reflecting different and complementary aspects of the evolutionary history of
sardine. Mitochondrial data might be reflecting past isolation of sardine populations into two
distinct groupings during Pleistocene whereas microsatellite data reveal the existence of present
day gene flow among populations, and a pattern of isolation by distance. |
|
| dc.description |
This work received financial support from a project of the MEC (Ministerio de Educación y Ciencia) to R. Z. (REN 2001-1514/GLO) and AECI-MAE
(Agencia Española de Cooperación Internacional – Ministerio de Asuntos Exteriores) project to T. Atarhouch and R.Z (project n° 168/03/P). E.G.G.
was sponsored by a predoctoral fellowship of the MEC. |
|
| dc.description |
Peer reviewed |
|
| dc.language |
eng |
|
| dc.publisher |
BioMed Central |
|
| dc.relation |
Publisher’s version |
|
| dc.relation |
http://dx.doi.org/10.1186/1471-2148-7-197 |
|
| dc.relation |
si |
|
| dc.rights |
openAccess |
|
| dc.rights |
http://creativecommons.org/licenses/by-nc-sa/4.0/ |
|
| dc.title |
Relative role of life-history traits and historical factors in shaping genetic population structure of sardines (Sardina pilchardus) |
|
| dc.type |
Artículo |
|