TY  - JOUR
AU  - Brendel, O.
AU  - Le Thiec, D.
AU  - Scotti-Saintagne, C.
AU  - Bodenes, C.
AU  - Kremer, A.
AU  - Guehl, J.M.
PY  - 2008//
TI  - Quantitative trait loci controlling water use efficiency and related traits in Quercus robur L
T2  - Tree Genet. Genomes
JO  - Tree Genetics & Genomes
SP  - 263
EP  - 278
VL  - 4
IS  - 2
PB  - SPRINGER HEIDELBERG
KW  - Quercus robur
KW  - carbon isotope composition
KW  - delta C-13
KW  - water use efficiency
KW  - QTL
N2  - Genetic variation for intrinsic water use efficiency (W-i) and related traits was estimated in a full-sib family of Quercus robur L. over 3 years. The genetic linkage map available for this F1 family was used to locate quantitative trait loci (QTL) for W-i, as estimated by leaf carbon stable isotope composition (delta C-13) or the ratio of net CO2 assimilation rate (A) to stomatal conductance to water vapour (g(w)) and related leaf traits. Gas exchange measurements were used to standardize estimates of A and g(w) and to model the sensitivity of gw to leaf-to-air vapour pressure deficit (sg(VPD)). delta C-13 varied by more than 3% among the siblings, which is equivalent to 40% variation of W-i. Most of the studied traits exhibited high clonal mean repeat-abilities (> 50%; proportion of clonal mean variability in global variance). Repeatabilities for delta C-13, leaf mass per area (LMA) and leaf nitrogen content were higher than 70%. For delta C-13, ten QTLs were detected, one of which was detected repeatedly for all 3 years and consistently explained more than 20% of measured variance. Four genomic regions were found in which co-localizing traits linked variation in W-i to variations in leaf chlorophyll and nitrogen content, LMA and sg(VPD). A positive correlation using clonal means between delta C-13 and A/g(w), as well as a co-localisation of QTL detected for both traits, can be seen as validation of the theoretical model linking the genetic architecture of these two traits.
SN  - 1614-2942
N1  - ISI:000253091100013
ID  - Brendel_etal2008
ER  -