Yield stability and canopy temperature of wheat genotypes under drought-stress

Blum, A.; Shpiler, L.; Golan, G.; Mayer, Jorge E.

doi:10.1016/0378-4290(89)90028-2

Cited by 167 publications

(150 citation statements)

References 7 publications

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“…The role of CFL and Chl in relation to grain yield under water-stress conditions were recommended for selecting drought and heat-tolerant wheat plants (Blum 1988(Blum , 1989Krause and Weis 1991). In the present study, WH730 (heat tolerant) had higher Chl and CFL than RAJ4014 (heat sensitive), under both normal and high temperature conditions.…”

Section: Discussionmentioning

confidence: 65%

Physiological traits associated with heat tolerance in bread wheat (Triticum aestivum L.)

Pandey

Mamrutha

Tiwari

et al. 2014

Physiol Mol Biol Plants

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Field experiments for evaluating heat tolerancerelated physiological traits were conducted for two consecutive years using a mapping population of recombinant inbred lines (RILs) from the cross RAJ4014/WH730. Chlorophyll content (Chl) and chlorophyll fluorescence (CFL) were recorded under timely sown (TS) and late sown (LS) conditions. Late sowing exposes the terminal stage of plants to high temperature stress. Pooled analysis showed that CFL and Chl differed significantly under TS and LS conditions. The mean value of CFL (Fv/Fm) and Chl under both timely and late sown conditions were used as physiological traits for association with markers. Regression analysis revealed significant association of microsatellite markers viz., Xpsp3094 and Xgwm131 with coefficients of determination (R 2 ) values for CFL (Fv/Fm) and Chl as 12 and 8 %, respectively. The correlation between thousand grain weight (TGW) with Chl and CFL were 14 and 7 % and correlation between grain wt./spike with Chl and CFL were 15 and 8 %, respectively. The genotypes showing tolerance to terminal heat stress as manifested by low heat susceptibility index (HSI=0.43) for thousand grain weight, were also found having very low Chl, HSI (−0.52). These results suggest that these physiological traits may be used as a secondary character for screening heat-tolerant genotypes.

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Section: Discussionmentioning

confidence: 65%

Physiological traits associated with heat tolerance in bread wheat (Triticum aestivum L.)

Pandey

Mamrutha

Tiwari

et al. 2014

Physiol Mol Biol Plants

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“…Canopy temperature measured by infrared thermometry is a method for estimating crop water and heat stress in wheat (Blum et al 1989;Reynolds et al 1998). Under conditions of droughtstress, wheat genotypes with lower midday canopy temperatures had a better plant water status (Blum et al 1989). Average canopy temperature measured between 1200 hours and 1400 hours at anthesis was 1.5-3.6 C lower in the RSLs than in Vigor18 and 3.6-5.7 C lower than in the cultivar Janz (Fig.…”

Section: Improving the Elongation Rate Of Seminal Rootsmentioning

confidence: 99%

“…This indicates that elongation rates of the seminal roots and, presumably, the depth of rooting was improved as the root system of wheat was enlarged by genetically increasing leaf vigour. Canopy temperature measured by infrared thermometry is a method for estimating crop water and heat stress in wheat (Blum et al 1989;Reynolds et al 1998). Under conditions of droughtstress, wheat genotypes with lower midday canopy temperatures had a better plant water status (Blum et al 1989).…”

Section: Improving the Elongation Rate Of Seminal Rootsmentioning

confidence: 99%

Large root systems: are they useful in adapting wheat to dry environments?

Palta

Chen

Milroy

et al. 2011

Functional Plant Biol.

254

187

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Abstract. There is little consensus on whether having a large root system is the best strategy in adapting wheat (Triticum aestivum L.) to water-limited environments. We explore the reasons for the lack of consensus and aim to answer the question of whether a large root system is useful in adapting wheat to dry environments. We used unpublished data from glasshouse and field experiments examining the relationship between root system size and their functional implication for water capture. Individual root traits for water uptake do not describe a root system as being large or small. However, the recent invigoration of the root system in wheat by indirect selection for increased leaf vigour has enlarged the root system through increases in root biomass and length and root length density. This large root system contributes to increasing the capture of water and nitrogen early in the season, and facilitates the capture of additional water for grain filling. The usefulness of a vigorous root system in increasing wheat yields under water-limited conditions maybe greater in environments where crops rely largely on seasonal rainfall, such as the Mediterranean-type environments. In environments where crops are reliant on stored soil water, a vigorous root system increases the risk of depleting soil water before completion of grain filling.Additional keywords: root biomass, root length, root length density, root system size, water capture.

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“…Cooler CT is associated with greater stomatal conductance and increased gas exchange rate under irrigated conditions and better hydration status under drought (Pinto et al 2010). Blum et al (1989) and Blum (2014) found a positive correlation between drought susceptibility and canopy temperature in stressed environments and genotypes with higher yield losses under drought had warmer canopies. In a study on rice, Ahmadikhah and Marufinia (2016) revealed that in severe water deficit, the rice mutant line MT85 (a rice mutant line which was 18 cm shorter than its wild type cv Neda) showed lower loss (19%) in yield as compared to Neda (31%) with high yield loss.…”

Section: Discussionmentioning

confidence: 99%

Construction and Efficiency of Selection Indices in Wheat (Triticum aestivum L.) under Drought Stress and Well-Irrigated Conditions

Ghaed-Rahimi¹,

Heidari²,

Dadkhodaie³

2017

Plant Breed. Biotech

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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. ABSTRACT Aggregate selection helps making selection decisions for improved profitability and permits to exploit information on correlated traits to improve accuracy. In the present study, the efficiency of trait selection was assessed by the Smith-Hazel (SHI) and the Pesek-Baker (PBI) models in 35 wheat genotypes under drought stress at heading and well-irrigated conditions at the Research Farm of Shiraz University, Iran in 2011 and 2012 years. The analysis of correlated response (CR) revealed that thousand grain weight (TGW) with CR = 24.05 (in 2011) and 9.15 (in 2012) and harvest index (HI) with CR = 18.37 (in 2011) and 9.08 (in 2012) had higher indirect effects on grain yield (GY) increase under drought stress. In both years, biological yield (BY), grain number/spike (GN), TGW, and GY had the highest genetic gain (ΔG) in SHI model. The top ten landraces in PBI for the trials in 2011 were also placed in the top rankings for grain yield under drought stress conditions. These results and estimation of the efficiency of selection (ΔH) revealed that PBI (ΔH = 19.95 and 16.5 in the first and 11.15 and 11.06 in the second year) was more efficient than SHI (ΔH = 9.58 and 8.97 in the first and 9.74 and 8.59 in the second year) in view of identifying superior genotypes based on aggregate trait selection. Overall, repeatability estimates for grain yield (33%-57.8%) was relatively low showing that individual plant selection has low efficiency for wheat improvement whilst aggregate trait selections leads to relatively high genetic gain (1.63-2.75) for grain yield.

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Yield stability and canopy temperature of wheat genotypes under drought-stress

Cited by 167 publications

References 7 publications

Physiological traits associated with heat tolerance in bread wheat (Triticum aestivum L.)

Physiological traits associated with heat tolerance in bread wheat (Triticum aestivum L.)

Large root systems: are they useful in adapting wheat to dry environments?

Construction and Efficiency of Selection Indices in Wheat (Triticum aestivum L.) under Drought Stress and Well-Irrigated Conditions

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