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PAPER PRESENTED AT INTERNATIONAL WORKSHOP ON INCREASING WHEAT YIELD POTENTIAL, CIMMYT, OBREGON, MEXICO, 20-24 MARCH 2006 An economic assessment of the use of physiological selection for stomatal aperture-related traits in the CIMMYT wheat breeding programme

Published on Jun 1, 2007in The Journal of Agricultural Science1.33
· DOI :10.1017/S0021859607007009
J. P. Brennan1
Estimated H-index: 1
(New South Wales Department of Primary Industries),
Anthony G. Condon34
Estimated H-index: 34
(CSIRO: Commonwealth Scientific and Industrial Research Organisation)
+ 1 AuthorsMatthew P. Reynolds61
Estimated H-index: 61
(CIMMYT: International Maize and Wheat Improvement Center)
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Abstract
SUMMARY Physiological research has shown that measurements on small plots of stomatal conductance, canopy temperature depression (CTD) or carbon isotope discrimination may be useful for screening breeding populations for yield potential, prior to the execution of expensive replicated yield trials. Such indirect selection criteria may be very effective as lower cost alternatives for estimating genetic gain for complex characteristics such as yield that are relatively expensive to measure accurately in the field. In the present paper, economic analysis is undertaken of the results of trials conducted at the International Maize and Wheat Improvement Center (CIMMYT) over three seasons to determine the value of the physiological traits being assessed. The results indicate that the economic value of incorporating these measurements into CIMMYT's breeding programme is potentially important. CTD and stomatal conductance are relatively cheap to measure and could be used to discard lines prior to extensive yield testing, whereas carbon isotope discrimination is relatively expensive and would not be economic for this purpose. The analysis indicates that the incorporation of physio- logical measurements is likely to provide important economic benefits to the programme. Indications are that other breeding programmes with similar breeding goals and comparable costing structures might also consider using such indirect selection traits.
  • References (10)
  • Citations (35)
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References10
Newest
Published on Jan 1, 2007
Anthony G. Condon34
Estimated H-index: 34
(CIMMYT: International Maize and Wheat Improvement Center),
Matthew P. Reynolds61
Estimated H-index: 61
(CIMMYT: International Maize and Wheat Improvement Center)
+ 3 AuthorsGraham D. Farquhar102
Estimated H-index: 102
More efficient wheat breeding methods are needed to meet demand for wheat from expected population growth in developing countries. This paper reports results from recent studies conducted at CIMMYT aimed at assessing the use of stomatal aperture-related traits (SATs) as indirect selection criteria for high yield-potential in bread wheat. Two classes of SATs were assessed: the instantaneous trait leaf porosity (POR), which is a close surrogate for stomatal conductance, and the integrative traits ...
Published on Jan 1, 2007
Richard Trethowan35
Estimated H-index: 35
(CIMMYT: International Maize and Wheat Improvement Center),
Matthew P. Reynolds61
Estimated H-index: 61
(CIMMYT: International Maize and Wheat Improvement Center)
Published on Feb 1, 2006in Agricultural Water Management3.54
R. A. Richards52
Estimated H-index: 52
(CSIRO: Commonwealth Scientific and Industrial Research Organisation)
A physiological understanding of plants’ responses to drought has often been sought on the pretext that this understanding will assist plant breeders develop higher yielding varieties for water-scarce environments. However, despite an extensive literature on plants’ response to drought there are few documented examples where a physiological understanding of drought has identified traits that limit yield under drought and where these have been used in successful crop improvement programs to enhan...
Published on Jan 1, 2006in Crop Science1.64
M. A. Babar4
Estimated H-index: 4
(OSU: Oklahoma State University–Stillwater),
Matthew P. Reynolds61
Estimated H-index: 61
(CIMMYT: International Maize and Wheat Improvement Center)
+ 3 AuthorsM. L. Stone27
Estimated H-index: 27
(OSU: Oklahoma State University–Stillwater)
The objectives of this study were to assess the potential of using spectral reflectance indices (SRI) as an indirect selection tool to differentiate spring wheat (Triticum aestivum L.) genotypes for grain yield under irrigated conditions. This paper demonstrates only the first step in using the SRI as indirect selection criteria by reporting genetic variation for SRI among genotypes, the effect of phenology and year on SRI and their interaction with genotypes, and the correlations between SRI an...
Published on Jan 1, 2002in Crop Science1.64
Greg J. Rebetzke31
Estimated H-index: 31
(CSIRO: Commonwealth Scientific and Industrial Research Organisation),
Anthony G. Condon34
Estimated H-index: 34
(CSIRO: Commonwealth Scientific and Industrial Research Organisation)
+ 1 AuthorsGraham D. Farquhar102
Estimated H-index: 102
(ANU: Australian National University)
Genetic gain is characteristically slow when selecting directly for increased grain yield under water-limited conditions. Genetic increases in grain yield may be achieved through increases in aerial biomass following selection for greater transpiration efficiency (TE as aerial biomass/water transpired). Strong negative correlations between TE and carbon isotope discrimination (A) in wheat (Triticum aestivum L.) suggest that selection of progeny with low Δ may increase TE and aerial biomass under...
Published on Jan 1, 2002
Paul W. Heisey11
Estimated H-index: 11
,
Maximina A. Lantican2
Estimated H-index: 2
,
H. Jesse Dubin2
Estimated H-index: 2
This report, which updates and extends the findings of an earlier CIMMYT study published in 1993, examines the impacts of international wheat breeding research in the developing world. Covering the period 1966-97, the report reviews investment in wheat breeding research by national and international breeding programs, documents the use of improved germplasm, estimates farm-level adoption of modern varieties (MVs), discusses factors that affect the adoption of MVs, and estimates the gross value o...
Published on Oct 1, 2001in Euphytica1.53
G. J. Rebetzke27
Estimated H-index: 27
(CSIRO: Commonwealth Scientific and Industrial Research Organisation),
Anthony G. Condon34
Estimated H-index: 34
(CSIRO: Commonwealth Scientific and Industrial Research Organisation)
+ 1 AuthorsJ.J. Read1
Estimated H-index: 1
(ANU: Australian National University)
Recent studies have demonstrated an association between increased stomatal conductance and genetic improvement of yield potential of wheat. However, the sensitivity of stomata to changes in environmental conditions makes screening of large populations for leaf conductance difficult in a breeding program. A rapid and inexpensive viscous air-flow porometer has recently been developed to accurately measure leaf conductance in amphistomatous species. This porometer has potential to assist in the rap...
Published on Jan 1, 2000in Australian Journal of Plant Physiology
Margaret M. Barbour32
Estimated H-index: 32
,
R.A. Fischer13
Estimated H-index: 13
+ 1 AuthorsGraham D. Farquhar102
Estimated H-index: 102
Theory (Craig and Gordon 1965; Dongmann et al. 1974; Sternberg et al. 1986; Farquhar and Lloyd 1993) suggests that the oxygen isotope ratio (d 18 O) of plant material should reflect the evaporative conditions under which the material was formed, so that differences in stomatal conductance should show up in plant d 18 O. To test this theory we measured the oxygen isotope ratio of organic matter from flag leaves at anthesis and grain at harvest from eight cultivars of spring wheat (Triticum aestiv...
Published on Jan 1, 1998in Crop Science1.64
R. A. Fischer1
Estimated H-index: 1
,
D. Rees19
Estimated H-index: 19
+ 3 AuthorsA. Larque Saavedra1
Estimated H-index: 1
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 (g s ), maximum photosynthetic rate (A max ), a...
Published on Jan 1, 1995
Mark W. Rosegrant57
Estimated H-index: 57
,
Mercedita C. Agcaoili-Sombilla4
Estimated H-index: 4
,
Nicostrato D. Perez6
Estimated H-index: 6
This paper examines the global food security picture through 2020, using a model that incorporates 35 individual countries and regions and 17 commodities to estimate supply and demand for food. It concludes that if governments and the international community maintain current levels of commitment to agricultural growth through cost-effective investment in agricultural research, extension, irrigation and water development, human capital, and rural infrastructure, the world as a whole will not expe...
Cited By35
Newest
Published on May 15, 2019in Sustainability2.59
Alejandro del Pozo15
Estimated H-index: 15
,
Nidia Brunel-Saldias + 5 AuthorsMarco A. Molina-Montenegro21
Estimated H-index: 21
The world’s five Mediterranean-climate regions (MCRs) share unique climatic regimes of mild, wet winters and warm and dry summers. Agriculture in these regions is threatened by increases in the occurrence of drought and high temperature events associated with climate change (CC). In this review we analyze what would be the effects of CC on crops (including orchards and vineyards), how crops and cropping and farming systems could adapt to CC, and what are the social and economic impacts, as well ...
Zamin Shaheed Siddiqui7
Estimated H-index: 7
(KU: University of Karachi),
Muhammad Umar1
Estimated H-index: 1
(KU: University of Karachi)
+ -3 AuthorsSoo Chul Park (National Academy of Agricultural Sciences)
Abiotic stress like drought and salinity is the major environmental constraints that limit agricultural production. Physiological mechanisms explaining plant tolerance offer valuable insights for the development of genetically modified crops. Plant water status and alteration in photosynthetic capacity are some common physiological depictions which are induced by abiotic stress like drought and salinity. Chiefly it is because both stresses caused cellular dehydration in the plants, predominantly...
Published on Jan 1, 2018in Crop & Pasture Science1.33
R. A. Fischer1
Estimated H-index: 1
(CSIRO: Commonwealth Scientific and Industrial Research Organisation),
G. J. Rebetzke27
Estimated H-index: 27
(CSIRO: Commonwealth Scientific and Industrial Research Organisation)
Early-generation (e.g. F2–F4) selection for grain yield itself is frustrated in particular by the small amounts of seed available. However, there has long been an interest in traits related to yield and reasonably faithfully expressed in spaced planting arrangements using little seed; these are potentially useful as indirect selection criteria for yield, with the view to increasing genetic progress per unit cost. This subject is revisited in this review, targeting potential yield (yield in the a...
Published on Mar 1, 2017in European Journal of Agronomy3.38
Maria Balota4
Estimated H-index: 4
(Suffolk University),
Andrew J. Green4
Estimated H-index: 4
(KSU: Kansas State University)
+ 2 AuthorsWade Everett Thomason17
Estimated H-index: 17
(VT: Virginia Tech)
Abstract Wheat ( Triticum aestivum L.) breeding strategies can benefit from periodic evaluation of genetic gains for physiological and morphological traits, and their contribution to yield progress over time in a particular environment. The objective of this research was to expand the recent work at Virginia Tech on genetic yield improvement in soft red winter (SRW) wheat and determine the magnitude of progress for several physiological traits in 50 SRW wheat cultivars released from 1919 to 2009...
Published on Dec 6, 2016in Frontiers in Plant Science4.11
David M. Deery6
Estimated H-index: 6
(CSIRO: Commonwealth Scientific and Industrial Research Organisation),
Greg J. Rebetzke31
Estimated H-index: 31
(CSIRO: Commonwealth Scientific and Industrial Research Organisation)
+ 7 AuthorsRobert T. Furbank15
Estimated H-index: 15
(ANU: Australian National University)
Lower canopy temperature (CT), resulting from increased stomatal conductance, has been associated with increased yield in wheat. Historically, CT has been measured with hand-held infrared thermometers. Using the hand-held CT method on large field trials is problematic, mostly because measurements are confounded by temporal weather changes during the time required to measure all plots. The hand-held CT method is laborious and yet the resulting heritability low, thereby reducing confidence in sele...
Published on Apr 19, 2016
Vasilis C. Gegas4
Estimated H-index: 4
,
Anyela V. Camargo5
Estimated H-index: 5
,
John H. Doonan10
Estimated H-index: 10
Published on Jan 1, 2016
Saeed Rauf6
Estimated H-index: 6
(UOS: University of Sargodha),
Jameel M. Al-Khayri21
Estimated H-index: 21
(King Faisal University)
+ 2 AuthorsFarghama Khalil3
Estimated H-index: 3
(UOS: University of Sargodha)
Global climate change is expected to increase the occurrence and severity of drought episodes due to increasing temperatures and evapotranspiration. Therefore, food security in the twenty-first century will increasingly depend on the release of new cultivars with improved adaptation to drought conditions. However, selection for drought tolerance is difficult due to a complex genotype and by environment interactions. Recent progress in genomics makes possible a more efficient assessment and enhan...
Published on Nov 30, 2015in Plant breeding and biotechnology
Taek-Ryoun Kwon2
Estimated H-index: 2
(National Academy of Agricultural Sciences),
Kyung-hwan Kim1
Estimated H-index: 1
(National Academy of Agricultural Sciences)
+ 3 AuthorsZamin Shaheed Siddiqui7
Estimated H-index: 7
(KU: University of Karachi)
Published on Jul 4, 2015in Critical Reviews in Plant Sciences4.19
Dominique Roche1
Estimated H-index: 1
(Dow AgroSciences)
The present review of gas-exchange studies conducted in rainfed or irrigated field conditions clearly indicates that stomatal conductance (gs) of major crops has been inadvertently increased in the last 50 to 80 years as higher yields were being reached through conventional plant breeding. These findings suggest that high gs rates are critical to optimum growth and yield of modern crops, in particular to crop growth rate (CGR) during seed formation and filling. Several hypotheses are presented t...
Published on May 12, 2015in Journal of applied botany and food quality1.11
Muhammad Mubashar Hussain1
Estimated H-index: 1
,
Saeed Rauf6
Estimated H-index: 6
(UOS: University of Sargodha)
+ 3 AuthorsPhilippe Monneveux8
Estimated H-index: 8
(CIP: International Potato Center)
Summary Berseem clover ( Trifolium alexandrinum L.) is an important forage crop in Pakistan and many ecotypes are grown across the country. Its yield is however frequently affected by insufficient irrigation due to unavailability of water. In the present study, twenty Pakistani ecotypes of berseem clover have been evaluated in lysimeters under full irrigation and water restriction conditions. In the full irrigation treatment soil humidity was maintained at field capacity, while in the water rest...