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doi:10.1534/genetics.105.048439
A more recent version of this article appeared on January 1, 2006.
REGULAR RESEARCH PAPERS |
Comparison of QTLs for adaptive traits between oak and chestnut based on an EST consensus map
Manuela Casasoli 1, Jeremy Derory 1, Caroline Morera-Dutrey 1, Oliver Brendel 2, Ilga Porth 3, Jean-Marc Guehl 2, Fiorella Villani 4 and Antoine Kremer 5*
1 INRA Pierroton
2 INRA Nancy
3 ARC Seibersdorf
4 CNR Porano
5 INRA
* To whom correspondence should be addressed. E-mail: antoine.kremer{at}pierroton.inra.fr.
Submitted on July 18, 2005
Revised on September 21, 2005
Accepted on 21 September 2005
A comparative genetic and QTL mapping was performed between Quercus robur L. and Castanea sativa Mill., two major forest tree species belonging to the Fagaceae family. Oak EST derived markers (STSs) were used to align the 12 linkage groups of the two species. Fifty-one and 45 STSs were mapped in oak and chestnut, respectively. These STSs, added to SSR markers previously mapped in both species, provided a total number of 55 orthologous molecular markers for comparative mapping within the Fagaceae family. Homeologous genomic regions identified between oak and chestnut allowed to compare QTL position for three important adaptive traits. Co-location of the QTLs controlling the timing of bud burst was significant between the two species. However, conservation of QTLs for height growth was not supported by statistical tests. No QTL for carbon isotope discrimination was conserved between the two species. Putative candidate genes for bud burst can be identified on the basis of co-locations between EST derived markers and QTLs.
Key Words: ESTs, Fagaceae, adaptive traits, comparative QTL mapping
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