Reduction in kernel weight as a potential indirect selection criterion for wheat grain yield under terminal heat stress

Sharma, R. C.; Tiwary, AK; Ortiz-Ferrara, G.

doi:10.1111/j.1439-0523.2007.01460.x

Cited by 54 publications

(50 citation statements)

References 27 publications

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“…Both fungicidal protection and normal date of planting helped to reduce the extent of yield loss. The results are consistent with the severe yield reduction reported due to spot blotch (Rosyara et al, 2007), heat stress (Sharma et al, 2008;Randall and Moss, 1990) or combined stresses (Sharma and Duveiller, 2004). …”

Section: Spot Blotch and Heat Tolerance In Spring Wheatsupporting

confidence: 81%

“…Increased mean temperature in the range of 12-26°C has been found to be associated with reduced grain filling (Wiegand and Cuellar, 1981). TKW has been reported to be most affected by high spot blotch severity (Sharma and Duveiller, 2004;Rosyara et al, 2007), heat stress (Sharma et al, 2008) and spot blotch combined with heat stress (Sharma and Duveiller, 2004). Spot blotch development and increased temperature affect wheat simultaneously in South Asian environments, producing similar consequences.…”

Section: Spot Blotch and Heat Tolerance In Spring Wheatmentioning

confidence: 90%

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Spot blotch and terminal heat stress tolerance in south Asian spring wheat genotypes

Rosyara¹,

Subedi²,

Sharma³

et al. 2009

Acta Agronomica Hungarica

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Terminal heat stress and spot blotch disease (caused by Cochliobolus sativus) are the most important stresses responsible for significant yield losses every year in warm South Asian plains. Both of these stresses are very severe in late planted wheat, which is common in rice-wheat and rice-rice-wheat cropping systems. The development of genotypes tolerant to both stresses might be very useful for increasing yield and reducing yield losses. Information is limited on how different genotypes respond to both stresses (individually and combined) and on the degree of tolerance present in South Asian wheat genotypes. The study was done to evaluate the tolerance of South Asian wheat genotypes to both stresses by comparing the stress factor susceptibility index (SFSI). Eleven diverse South Asian genotypes were evaluated under spot blotch stress (non-fungicide protected plots), heat stress (late planted and fungicide protected), both stresses (non-fungicide protected and late planted) and normal planting situations (fungicide protected and normal season planted) at Rampur, Chitwan, Nepal. Both stresses reduced the grain yield and thousand-kernel weight (TKW), but not other yield components, including grains/spike and spikelets/spike. Genotypes BL 1473, Gautam and NL971 were moderately to highly tolerant to both types of stress. Generally genotypes that are tolerant or resistant to spot blotch also showed tolerance to heat stress, suggesting a common physiological mechanism to combat both stresses in tolerant genotypes.

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Section: Spot Blotch and Heat Tolerance In Spring Wheatsupporting

confidence: 81%

Section: Spot Blotch and Heat Tolerance In Spring Wheatmentioning

confidence: 90%

Spot blotch and terminal heat stress tolerance in south Asian spring wheat genotypes

Rosyara¹,

Subedi²,

Sharma³

et al. 2009

Acta Agronomica Hungarica

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show abstract

“…The heritability of yield and TGW under normal and late-sown condition including their HSI were in agreement with Pinto et al (2010) who reported heritabilities in the range of 68-71, 83-90, 54-86 % for TGW and yield (gM 2 ) under normal, heat stressed, and drought conditions, respectively. This is one of the reasons that yield traits and GFD are the preferable criteria to screen for tolerance against abiotic stresses including heat and drought (Sharma et al 2008;Yang et al 2002;Pinto et al 2010). The heritability for CTD was relatively moderate (81 %).…”

Section: Discussionmentioning

confidence: 99%

QTL mapping of terminal heat tolerance in hexaploid wheat (T. aestivum L.)

et al. 2012

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High temperature (>30 °C) at the time of grain filling is one of the major causes of yield reduction in wheat in many parts of the world, especially in tropical countries. To identify quantitative trait loci (QTL) for heat tolerance under terminal heat stress, a set of 148 recombinant inbred lines was developed by crossing a heat-tolerant hexaploid wheat (Triticum aestivum L.) cultivar (NW1014) and a heat-susceptible (HUW468) cultivar. The F(5), F(6), and F(7) generations were evaluated in two different sowing dates under field conditions for 2 years. Using the trait values from controlled and stressed trials, four different traits (1) heat susceptibility index (HSI) of thousand grain weight (HSITGW); (2) HSI of grain fill duration (HSIGFD); (3) HSI of grain yield (HSIYLD); and (4) canopy temperature depression (CTD) were used to determine heat tolerance. Days to maturity was also investigated. A linkage map comprising 160 simple sequence repeat markers was prepared covering the whole genome of wheat. Using composite interval mapping, significant genomic regions on 2B, 7B and 7D were found to be associated with heat tolerance. Of these, two (2B and 7B) were co-localized QTL and explained more than 15 % phenotypic variation for HSITGW, HSIGFD and CTD. In pooled analysis over three trials, QTL explained phenotypic variation ranging from 9.78 to 20.34 %. No QTL × trial interaction was detected for the identified QTL. The three major QTL obtained can be used in marker-assisted selection for heat stress in wheat.

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“…The phenotypic selection using indirect selection parameters viz., thousand grain weight (Sharma et al, 2008) for heat tolerance has been done.…”

Section: -Grain Weightmentioning

confidence: 99%

Heat Tolerance in Wheat - A Key Strategy to Combat Climate Change through Molecular Markers

Chandra¹,

Prasad²,

Thakur³

et al. 2017

Int.J.Curr.Microbiol.App.Sci

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Reduction in kernel weight as a potential indirect selection criterion for wheat grain yield under terminal heat stress

Cited by 54 publications

References 27 publications

Spot blotch and terminal heat stress tolerance in south Asian spring wheat genotypes

Spot blotch and terminal heat stress tolerance in south Asian spring wheat genotypes

QTL mapping of terminal heat tolerance in hexaploid wheat (T. aestivum L.)

Heat Tolerance in Wheat - A Key Strategy to Combat Climate Change through Molecular Markers

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