Effect Of High Temperature On Yield Attributing Traits In Bread Wheat

Singh, Kiran; Sharma, S. N.; Sharma, Y. K.

doi:10.3329/bjar.v36i3.9270

Cited by 31 publications

(32 citation statements)

References 3 publications

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“…Hence, low stress susceptibility indices (SSI<1) is synonymous with high stress tolerance (Fisher and Maurer, 1978). Several authors (Khanna-Chopra and Viswanathan, 1999;Singh et al, 2011;Sharma et al, 2013) evaluated stress susceptibility indices of yield and its different components of wheat genotypes for heat stress tolerance and grouped them into highly tolerant, tolerant and susceptible genotypes based on their SSI values. In our study, the estimates of SSI indices revealed that, the genotypes G-14, G-12 and G-13 had the lowest SSI value and therefore these genotypes had low heat susceptibility and high yield stability under late sowing condition.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of Spring Wheat Genotypes (Triticum Aestivum L.) for Heat Stress Tolerance Using Different Stress Tolerance Indices

Khan¹,

Kabir²

2015

Cercetari Agronomice in Moldova

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Twenty five spring wheat genotypes were evaluated for terminal heat stress tolerance in field environments in the Agro Ecological Zone-11 of Bangladesh, during 2009-2010 cropping season. The experiments were conducted at Wheat Research Centre, Bangladesh Agricultural Research Institute, using randomized block design with three replicates under non-stress (optimum sowing) and stress (late sowing) conditions. Seven selection indices for stress tolerance including mean productivity (MP), geometric mean productivity (GMP), tolerance (TOL), yield index (YI), yield stability index (YSI), stress tolerance index (STI) and stress susceptibility index (SSI) were calculated based on grain yield of wheat under optimum and late sowing conditions. The results revealed significant variations due to genotypes for all characters in two sowing conditions. Principal component analysis revealed that the first PCA explained 0.64 of the variation with MP, GMP, YI and STI. Using MP, GMP, YI and STI, the genotypes G-05 and G-22 were found to be the best genotypes with relatively high yield and suitable for both optimum and late heat stressed conditions. The indices SSI, YSI and TOL could be useful parameters in discriminating the tolerant genotypes (G-12, G-13, and G-14) that might be recommended for heat stressed conditions. It is also concluded from the present studies that biomass, grain filling rate and spikes number m -2 are suitable for selecting the best genotypes under optimum and late sowing conditions because these parameters are highly correlated with MP, GMP, YI and STI. However, high ground cover with long pre heading stage and having high grain filling rate would made a genotype tolerant to late heat to attain a high grain yield in wheat.

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Section: Resultsmentioning

confidence: 99%

Evaluation of Spring Wheat Genotypes (Triticum Aestivum L.) for Heat Stress Tolerance Using Different Stress Tolerance Indices

Khan¹,

Kabir²

2015

Cercetari Agronomice in Moldova

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“…Durum wheat accounts for only 4 per cent of the total world production. Nearly 10-12 million tonnes of durum, valued around US $ 2600 million is traded annually (Singh et al, 2011).…”

Section: Issn: 2319-7706 Volume 7 Number 01 (2018)mentioning

confidence: 99%

Genetic Variability, Heritability and Genetic Advance in Durum Wheat (Triticum durum Desf.)

Rathwa¹,

Pansuriya²,

Patel³

et al. 2018

Int.J.Curr.Microbiol.App.Sci

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“…29 In order to determine relative tolerance, heat susceptibility index (HSI) was estimated to characterize wheat genotypes as highly heat tolerant (HSI < 0.50), heat tolerant (HSI: 0.51-0.75), moderately heat tolerant (HSI: 0.76-1.00) and heat susceptible (HSI > 1.00). 30 The HSI value for grain yield was maximum in DBW 140 which followed by RAJ-3765 (Fig. 2C).…”

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confidence: 93%

Comparative physiological response of wheat genotypes under terminal heat stress

Dhyani

Ansari

Rao

et al. 2013

Plant Signaling & Behavior

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Keywords: heat stress, malondialdehyde, proline, superoxide dismutase, timely and late sown condition, wheat genotypes thermostability, canopy function, stable green habit, better mobilization rate of food reserve and other technical or physiological parameters might be helpful to overcome yield loss under terminal heat stress. 12 In vitro studies of wheat plants in combination with genetic manipulation to develop heat tolerant wheat are of limited success. Therefore, the complex physiological-genetic approach could be useful to acquire heat tolerance in wheat to minimize the farmer's risk for reduced yield and low quality grain product. Here, Physiological evaluation of wheat genotypes was performed under timely and late sown condition. Results Estimation of chlorophyll index (SPAD-values), leaf area index (LAI) and proline content. Chlorophyll content (SPAD-values)of wheat genotypes viz., DBW-140, RAJ-3765, PBW-574, K-0-307 and HS-240 under timely and late sown was calculated after 30, 50, 70, 90 and 110 d. It was found that SPAD-values affected under timely and late sown conditions were 41.5, 38.9, 37.08, 37.67, 47.7, 47.59, 46.56, 46.73, 41.03, 40 and 40.15, 34.5, 34.76, 33.33, 45.63, 44, 43.03, 42.52, 4,137 and HS-240 genotypes showed highest reduction in LAI (0.3, 1.36, 3.78, 3.0 and 0.37, 2.08, 3.94, 3.29) at 30, 70 and 90 d after sowing, respectively (Fig. 1B). The proline content (μg g −1 FW) was found to be increased in all the genotypes studied (30.25, 160.5, 135.2, 262.1, 184.0 and 221.68, 236.55, 261.77, 419.35) under late sown condition as compared with that of timely sown condition (89.6, 106.8, 119.6, 62.0 and 21.98, 20.66, 37.0, 20.86, 18.37) at both anthesis and 15 DAS, except , respectively (Fig. 1C).Evaluation of malondialdehyde (MDA) content, superoxide dismutase (SOD) activity, heat susceptibility index (s) (HIS) and yield associated traits. The amount of malondialdehyde (MDA) (μ mole g −1 FW) produced when polyunsaturated fatty acids in the membrane undergone lipid peroxidation in wheat genotypes were calculated as 13. 06, 11.80 and 7.26, 4.23 in HS 240 and K-0-307 genotypes respectively at the time of anthesis in late sown and timely sown conditions. The similar trends were also observed in HS 240 and K-0-307 genotypes 15 DAS, which followed by Raj 3765, DBW 140 and PBW 574 genotypes ( Fig. 2A). There is no significant increase in superoxide dismutase (SOD) activity (unit mg −1 FW) in genotypes evaluated at anthesis stage under timely and late sown conditions. In contrast, after 15 d of anthesis SOD activity was highest in RAJ-3765 (1.88) whereas in HS-240 and K-0-307 genotypes it was lowest (1.63 and 1.60) under late sown condition (Fig. 2B). The heat susceptibility index (HIS) of HS 240 and K-0-307 wheat genotypes was highest (1.33, 1.57, 1.51 and 1.17, 1.34, 1.65), which followed by DBW 140, Raj 3765 and PBW 574 genotypes (0.846, 0.649 and 0.411), (0.780, 0.905 and 0.905) and (0.897, 0.457 abd 0.682) for 1000-grain weight, grain weight and grain yield, respectively (Fig. 2C). Y...

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Effect Of High Temperature On Yield Attributing Traits In Bread Wheat

Cited by 31 publications

References 3 publications

Evaluation of Spring Wheat Genotypes (Triticum Aestivum L.) for Heat Stress Tolerance Using Different Stress Tolerance Indices

Evaluation of Spring Wheat Genotypes (Triticum Aestivum L.) for Heat Stress Tolerance Using Different Stress Tolerance Indices

Genetic Variability, Heritability and Genetic Advance in Durum Wheat (Triticum durum Desf.)

Comparative physiological response of wheat genotypes under terminal heat stress

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