Service Communautaire d'Information sur la Recherche et le Développement - CORDIS

Database on phenological, ecophysiological and structural observations of French half-sib population of Fagus sylvatica and report on analysis of genetic control of adaptive traits

A beech field test was established in 1997 in northeast France. It included 48 open-pollinated families replicated 4 times and 8 grafted copies of the respective mother trees. Bud burst was observed in spring of 2002 and 2003 on seedlings and grafts. Several ecophysiological traits were observed on part of the grafted clonal test in June 2000. Significant heritability values confirm that beech bud burst is under strong genetic control as many other species of temperate climate. Among ecophysiological traits, Vcmax (maximum rate of RubisCO activity), G1 (slope of stomatal conductance model according to Leuning et al. [8]) and An/gs (ratio of light-saturated net photosynthesis and stomatal conductance measured at CO2 concentration of 350 µmol mol-1) showed slight genetic control. But none of these traits displayed any significant heritability. This trial is probably the first attempt on beech to introduce copies of parent trees in the progeny test to reduce the age effect on heritability estimates.


Eric TEISSIER DU CROS, (Project leader)
Tél.: +33 4 90 135911
Fax: +33 4 90 135959