A survey of the effects of high temperature during grain filling on yield and quality of 75 wheat cultivars

Stone, PJ; Nicolas, ME

doi:10.1071/ar9950475

Cited by 133 publications

(97 citation statements)

References 29 publications

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“…The damage caused by heat stress depends not only on the timing, but also on the duration of the stress. Exposure to high temperatures for a period of eight days after anthesis caused no reduction either in grain number or weight or in the number of deformed grains [15].…”

Section: Introductionmentioning

confidence: 86%

Productivity of a doubled haploid winter wheat population under heat stress

et al. 2012

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Breeding of new winter wheat cultivars with good heat tolerance requires better understanding of the genetic background of heat tolerance. In the present work the effect of heat stress on the 6 th day after heading was investigated in a doubled haploid (DH) population arising from a cross between heat-sensitive (Plainsman V) and heat-tolerant (Mv Magma) cultivars. Averaged over the population, heat stress was found to result in a significant reduction in biomass, grain yield and grain number per plant, and in thousand-kernel weight (TKW) and harvest index. High temperature had the greatest effect on the grain yield, with a drop of 36.2% compared with the control. This could be attributed jointly to significant reductions in the TKW of the main ear and in the grain number of the side tillers. The relationship between the yield parameters was confirmed by the positive correlations obtained for the lines in the population. The diverse levels of heat tolerance in the different lines were confirmed by the significant differences in the reduction in the chlorophyll content (SPAD index) of the flag-leaves and in yield parameters. The changes in yield components in stress condition, however, can be still the most effective tools for heat stress evaluation.

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Section: Introductionmentioning

confidence: 86%

Productivity of a doubled haploid winter wheat population under heat stress

et al. 2012

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“…Mechanisms underlying the complex formation are still unresolved, although there is evidence that physical association of these proteins depends on their phosphorylation status (Tetlow et al, 2004). Considerable genetic variability in tolerance to short periods of high temperature during grain filling for both grain yield and quality indicates breeding opportunities (Stone and Nicolas, 1995b). Further research should address the impact of brief heat shock periods and the mechanism behind the genetic variability as well as their biophysical limits.…”

Section: Starch Synthesismentioning

confidence: 99%

Physiological Traits for Improving Heat Tolerance in Wheat

2012

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“…Studies of heat stress on wheat have been focusing on the period of grain filling (Borghi et al, 1995;Corbellini et al, 1997Corbellini et al, , 1998Stone and Nicolas, 1995), and have shown that two typical heat stresses are common during wheat grain filling. "Heat shock" is characterized by sudden, extreme high temperatures (>32 C) for a short duration (3e5 days), while" chronic heat stress" consists of moderately high maximum temperatures (20e30 C) for a longer duration.…”

Section: Introductionmentioning

confidence: 99%