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Originally published as Genetics Published Articles Ahead of Print on October 3, 2005.
Genetics, Vol. 172, 533-546, January 2006, Copyright © 2006
doi:10.1534/genetics.105.048439
Comparison of Quantitative Trait Loci for Adaptive Traits Between Oak and Chestnut Based on an Expressed Sequence Tag Consensus Map
Manuela Casasoli*,1,
Jeremy Derory*,1,
Caroline Morera-Dutrey*,
Oliver Brendel
,
Ilga Porth
,
Jean-Marc Guehl,
Fiorella Villani
and
Antoine Kremer*,2
* INRA, UMR Biodiversité Gènes et Ecosystèmes, 33612 Cestas Cedex, France, INRA-UHP, UMR Ecologie et Ecophysiologie Forestières, Centre de Nancy 54280 Champenoux, France, CNR, Istituto di Biologia Agroambientale e Forestale, 05010 Porano (TR), Italy and ARC Seibersdorf Research, Biotechnology Unit, A-2444 Seibersdorf, Austria
2 Corresponding author: INRA, UMR BIOGECO Equipe de Génétique, 69 Rte. d'Arcachon, 33612 Cestas Cedex, France.
E-mail: antoine.kremer{at}pierroton.inra.fr
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 us to compare QTL positions for three important adaptive traits. Colocation of the QTL controlling the timing of bud burst was significant between the two species. However, conservation of QTL 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 colocations between EST-derived markers and QTL.
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