NDLI: Quantitative trait loci controlling water use efficiency and related traits in Quercus robur L.

Content Provider	Springer Nature Link
Author	Brendel, Oliver Thiec, Didier Scotti Saintagne, Caroline Bodénès, Catherine Kremer, Antoine Guehl, Jean Marc
Copyright Year	2007
Abstract	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 (δ $^{13}$C) or the ratio of net CO$_{2}$ 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 g $_{w}$ to leaf-to-air vapour pressure deficit (sg$^{VPD}$). δ $^{13}$C 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 repeatabilities (>50%; proportion of clonal mean variability in global variance). Repeatabilities for δ $^{13}$C, leaf mass per area (LMA) and leaf nitrogen content were higher than 70%. For δ $^{13}$C, 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 δ $^{13}$C 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.
Starting Page	263
Ending Page	278
Page Count	16
File Format	PDF
ISSN	16142942
Journal	Tree Genetics & Genomes
Volume Number	4
Issue Number	2
e-ISSN	16142950
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-08-29
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Quercus robur Carbon isotope composition δ $^{13}$C Water use efficiency QTL Biotechnology Tree Biology Plant Breeding/Biotechnology Plant Genetics & Genomics Forestry
Content Type	Text
Resource Type	Article
Subject	Genetics Molecular Biology Horticulture Forestry

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