HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (11) Citing Articles via Google Scholar Google Scholar Articles by Merah, O. Articles by Monneveux, P. Search for Related Content PubMed Articles by Merah, O. Articles by Monneveux, P. Agricola Articles by Merah, O. Articles by Monneveux, P. Related Collections Wheat

CROP BREEDING, GENETICS & CYTOLOGY

Stability of Carbon Isotope Discrimination and Grain Yield in Durum Wheat

^a UFR de Génétique et Amélioration des Plantes, ENSA-INRA, 2 place Viala, F-34060 Montpellier Cedex, France
^b Institut de Biotechnologie des Plantes, UMR 8618, Bat 630, Université de Paris-Sud, Centre d'Orsay, F-91405-Orsay Cedex, France
^c UFR de Génétique et Amélioration des Plantes, ENSA-INRA, 2 place Viala, F-34060 Montpellier Cedex, France
^d CIMMYT/ICARDA Durum Wheat Program, ICARDA P.O. Box 5466, Aleppo, Syria

* Corresponding author (merah{at}ensam.inra.fr)

Carbon isotope discrimination () has been proposed as an indirect selection criterion for transpiration efficiency and grain yield in bread wheat (Triticum aestivum L.) and barley (Hordeum vulgare L.), with potential value for durum wheat (Triticum turgidum convar. durum Desf. MacKey). We evaluated the genetic variation for , the relationship between and grain yield, and the magnitude of genotype x year (G x Y) interactions in durum wheat. Field experiments were conducted under Mediterranean conditions on 144 durum wheat accessions during three successive years. Grain yield and carbon isotope discrimination of flag leaves (F) and kernels (K) were measured. Large genotypic and year variation was observed for F and K. Flag leaf was correlated with grain yield in 2 yr characterized as having greater water limitation (r = 0.29 - 0.38, P < 0.001). Conversely, K and grain yield were significantly correlated in all 3 yr (r = 0.49 - 0.52, P < 0.001). In addition, G x Y interactions were significant for F, K and grain yield. However, significant correlations (P < 0.001) were noted for K across years. As a result, K may serve as a better predictive criterion for higher grain yield under Mediterranean conditions.

Abbreviations: ¹³C, Carbon isotope composition • , carbon isotope discrimination for flag leaf (F) and for kernel (K) • G x E, genotype x environment interaction • G x Y, genotype x year interaction • Pi/Pa, The ratio of the intercellular and atmospheric partial pressure of CO₂ • R/ET, Rainfall/Penman Evapotranspiration • TE, Transpiration efficiency

This article has been cited by other articles:

				A. G. Condon, R. A. Richards, G. J. Rebetzke, and G. D. Farquhar Breeding for high water-use efficiency J. Exp. Bot., November 1, 2004; 55(407): 2447 - 2460. [Abstract] [Full Text] [PDF]

				J. L. Araus, D. Villegas, N. Aparicio, L. F. G. del Moral, S. El Hani, Y. Rharrabti, J. P. Ferrio, and C. Royo Environmental Factors Determining Carbon Isotope Discrimination and Yield in Durum Wheat under Mediterranean Conditions Crop Sci., January 1, 2003; 43(1): 170 - 180. [Abstract] [Full Text] [PDF]