期刊
JOURNAL OF PHYCOLOGY
卷 46, 期 4, 页码 720-727出版社
WILEY
DOI: 10.1111/j.1529-8817.2010.00846.x
关键词
barcoding; cox2-cox3 spacer; cyto-nuclear linkage disequilibrium; hybridization; introgression; ITS; rbcL; Rhodophyta
资金
- European Commission [INCO-EPIFIGHT ICA4-CT-2001-10021]
- Fondation BETTENCOURT SCHUELLER
- French Embassy in Chile
- Region Bretagne
- LIA DIAMS
- UACH-DID [S-200801]
Molecular markers belonging to the three different genomes, mitochondrial (cox2-cox3 spacer), plastid (rbcL), and nuclear (internal transcribed spacer [ITS] 2 region), were used to compare samples of the two morphologically related species Gracilaria gracilis (Stackh.) Steentoft, L. M. Irvine et Farnham and G. dura (C. Agardh) J. Agardh collected along Atlantic coasts. In northern Europe, the distinction between these two species is ambiguous, and they are currently recognized under the single name of G. gracilis. The low but congruent patterns of genetic divergence observed for markers of the three genomic compartments highly suggest that these two taxa correspond effectively to two different genetic entities as previously described 200 years ago, based on morphological traits. However, thanks to the combination of different DNA markers, occurrence of incongruent cytotypes (i.e., mitotypes of G. dura associated with chlorotypes of G. gracilis) in individuals collected from Brittany, suggests interspecific hybridization between the two sibling species studied.
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