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

This Article Abstract 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 Similar articles in PubMed 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 (81) Citing Articles via Google Scholar Google Scholar Articles by Richards, R. A. Articles by van Herwaarden, A. F. Search for Related Content PubMed PubMed Citation Articles by Richards, R. A. Articles by van Herwaarden, A. F. Agricola Articles by Richards, R. A. Articles by van Herwaarden, A. F. Related Collections Water Stress Crop Physiology & Metabolism Wheat

Breeding Opportunities for Increasing the Efficiency of Water Use and Crop Yield in Temperate Cereals

CSIRO Plant Industry, P.O. Box 1600, Canberra, ACT, Australia 2601

View larger version (13K): [in a new window]   Fig. 1. Relationship between sowing date and water-use efficiency of wheat. Data are from near-isogenic populations differing in flowering time and grown at different locations and years in eastern Australia. Water use efficiency (WUE) was calculated as the total above-ground biomass per unit of rainfall between April and October. Adapted from Gomez-Macpherson and Richards (1995).

View larger version (14K): [in a new window]   Fig. 2. Variation in coleoptile length and plant height of GA-insensitive semidwarf cultivars, GA-sensitive standard height cultivars, and GA-sensitive semidwarf lines with long coleoptiles from 3 populations. Coleoptile length of lines was determined at 11 and 15°C whereas plant height of lines was measured at maturity in a single favorable environment following a late autumn sowing.

View larger version (14K): [in a new window]   Fig. 3. Relationship between leaf breadth of seedling leaves and leaf area for random families derived from a convergent cross population differing in vigor. Lines were grown in 10 m2 field plots at Condobolin together with semidwarf check varieties Janz, Hartog, and Amery. Note that the Australian cultivars are amongst the lines with the lowest vigor. (Data adapted from Rebetzke and Richards, 1999.)

View larger version (14K): [in a new window]   Fig. 4. Relationship between transpiration efficiency of wheat at Wagga Wagga and pan evaporation (USWB class A). Unpublished data of Warren and Lill, cited in Fischer (1979). Data adapted to northern hemisphere seasons.

View larger version (10K): [in a new window]   Fig. 5. Grain yield advantage of near-isogenic Hartog lines selected for low carbon isotope discrimination () compared with lines selected for high evaluated across nine environments differing in seasonal rainfall. Grain yield advantage (%) was estimated as: [(Low group - High group)/High group] x 100. Yield varied from around 1.5 Mg ha-1 with 250 mm rainfall to 5 Mg ha-1 with 450 mm rainfall.

View larger version (14K): [in a new window]   Fig. 6. Relationship between apparent remobilization of stem and leaf sheath reserves and grain yield for bread wheat, durum wheat, barley, triticale, and oats. Grain yield of barley and oats has been corrected for husk mass. (Adapted from López-Castañeda and Richards, 1994.)