Cited by 887Crop Yield and Soil FertilityGenetics and Plant BreedingWheat and Barley Genetics and Pathology

The DOI matches its Crossref record.

Wheat Yield Progress Associated with Higher Stomatal Conductance and Photosynthetic Rate, and Cooler Canopies

Fischer, R. A., Rees, D., Sayre, K. D., Lu, Z.‐M., Condon, A. G., Saavedra, A. Larque·1998·Crop Science

Abstract

Grain yields of eight representative semidwarf spring wheat (Triticum aestivum L.) cultivars released in northwest Mexico between 1962 and 1988 have increased linearly across years as measured in this region during 6 yr under favorable management and irrigation. To understand the physiological basis of this progress and possibly assist future selection for grain yield, leaf traits were determined during 3 yr in the same study. Stomatal conductance (gs), maximum photosynthetic rate (A max, and canopy temperature depression (CTD), averaged over the 3 yr, were closely and positively correlated with progress in the 6‐yr mean yield. The correlation was greatest with gs (r = 0.94, P < 0.01). Compared with the overall yield increase of 27%, gs increased 63%, A max increased 23%, and canopies were 0.6°C cooler. Carbon‐13 isotope discrimination was also positively associated with yield progress (r = 0.71, P < 0.05), but other leaf traits such as flag leaf area, specific leaf weight, percentage N and greeness were not, nor was crop growth rate around anthesis. The causal basis of the leaf activity interrelationships is reasonably clear, with both increased intercellular CO 2 concentration and increased mesophyll activity contributing to the increase in A max. However, causal links to the yield progress, and the accompanying increase in kernels per square meter, are not clear. It is concluded that g s and CTD should be further investigated as potential indirect selection criteria for yield.

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Crossref · 10.2135/cropsci1998.0011183x003800060011x

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Metadata

Authors
Fischer, R. A., Rees, D., Sayre, K. D., Lu, Z. ‐., Condon, A. G., & Saavedra, A. L.
Affiliations
  • Australian Centre for International Agricultural Research (AU)
  • Natural Resources Institute (GB)
  • Centro Internacional de Mejoramiento de Maíz Y Trigo (MX)
  • University of California, Los Angeles (US)
  • Commonwealth Scientific and Industrial Research Organisation (AU)
  • Cologeio de Postgraduados, Centro de Botanica Montecillo Texcoco Edo de Mexico Mexico
Corresponding author
Fischer, R. A.
Venue
Crop Science
Publisher
Wiley
Published
1998-11
Volume
38
Issue
6
Pages
1467-1475
ISSN
  • 0011-183X (ISSN-L)
  • 1435-0653
OpenAlex
W2058467808
Cited by
887
References
0
Citations by year
2026: 12 · 2025: 26 · 2024: 31 · 2023: 41 · 2022: 53 · 2021: 63 · 2020: 56 · 2019: 60 · 2018: 42 · 2017: 42 · 2016: 48 · 2015: 46 · 2014: 45 · 2013: 45 · 2012: 39
FWCI
33.54
Type
journal article
Language
en
Open access
closed
Locations
Crop Science (publishedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Crop Yield and Soil Fertility
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Genetics and Plant Breeding
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Wheat and Barley Genetics and Pathology
Keywords
stomatal conductance, photosynthetic rate, canopy temperature depression, carbon isotope discrimination, leaf traits, intercellular CO2 concentration, northwestern Mexico

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