NDLI: Physiological characterization of recombinant inbred lines of barley with contrasting levels of carbon isotope discrimination

Content Provider	Springer Nature Link
Author	Chen, Jing Chang, Scott X. Anyia, Anthony O.
Copyright Year	2013
Abstract	Carbon isotope discrimination (Δ$^{13}$C) in C$_{3}$ plants used as an indirect measure of water-use efficiency (WUE) provides a tool for selecting crops with high WUE under dry environments.We evaluated the physiology and Δ$^{13}$C of a set of 8 F$_{5}$ recombinant inbred lines (RILs) with contrasting levels of leaf Δ$^{13}$C derived from two parents, ‘W89001002003’ (low Δ$^{13}$C) and ‘I60049’ (high Δ$^{13}$C) of six-row barley (Hordeum vulgare L.) in a greenhouse and under field conditions in three locations (Lacombe, Vegreville and Castor). In the greenhouse experiment, seven days of water deficit was imposed at the stem elongation stage followed by re-watering to pre-deficit level.A significant negative relationship between WUE and leaf Δ$^{13}$C was observed. Under water-deficit conditions, both photosynthetic rate (A) and stomatal conductance (g $_{ s }$) were significantly reduced with a strong positive correlation (r = 0.89) between the two, and the variation in g $_{s}$ was proportionally greater than A. The low leaf-Δ$^{13}$C RIL ‘147’ maintained the highest A and g $_{ s }$ among ten genotypes (RILs and parents) under water-deficit conditions. Leaf Δ$^{13}$C was positively correlated with biomass and grain yield in the field trials. Multivariate analysis of leaf Δ$^{13}$C, harvest index and plant height discriminated genotypes into three clusters: drought sensitive, drought tolerant and an intermediate type.The study suggests that it is possible to select low Δ$^{13}$C lines such as RIL ‘147’, which is able to maintain or produce high yields under low moisture conditions on the Canadian Prairies
Starting Page	335
Ending Page	349
Page Count	15
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	369
Issue Number	1-2
e-ISSN	15735036
Language	English
Publisher	Springer Netherlands
Publisher Date	2013-01-05
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Canonical discriminant analysis (CDA) Drought tolerance Genotypic variation The Canadian Prairies Water-use efficiency (WUE) Plant Sciences Soil Science & Conservation Plant Physiology Ecology
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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