Heat tolerance for yield and its components in different wheat cultivars

Shpiler, L.; Blum, A.

doi:10.1007/bf00039727

Cited by 81 publications

(50 citation statements)

References 13 publications

(19 reference statements)

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“…Many excellent reports are available on the effects of heat stress on grain development, but only a few of these studies provide a detailed phenological characterisation combined with measurements of changes in yield due to heat stress (Shpiler and Blum 1990;Reynolds et al 1994;Hossain et al 2012). In the present study, heat treatment was carried out at five different phenological phases, from the first node detectable (DEV31) growth stage to 20 days after flowering, on four wheat genotypes with very different adaptation strategies, representing the pair wise parental lines of two wheat mapping populations (Balla et al 2012).…”

Section: Discussionmentioning

confidence: 99%

Heat stress response of wheat cultivars with different ecological adaptation

Bányai

Karsaï

Balla

et al. 2014

Cereal Research Communications

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In the present study, heat treatment was carried out in five different phenological phases, from the first node detectable (DEV31) growth stage to 20 days after flowering, on four wheat genotypes with very different adaptation strategies. They were grown in a controlled environment in a phytotron chamber and exposed to a night temperature of 20ºC and a day temperature of either 30ºC, at DEV31, or 35ºC at all the later developmental phases, for an interval of 14 days. Plant height, leaf number, number of tillers, grain number and grain weight per main and side spikes, TKW per main and side spikes, length of the main and side spikes, and spikelet number per main and side spikes were recorded. High temperature enhanced the stem growth intensity, plant height and tiller number. In contrast, the length of side spikes, spikelet no./side spike, grain no./main and side spike, grain weight/main and side spike and TKW/main and side spike were significantly decreased. The stress response depended strongly on the developmental phase in which the heat stress was applied. Fleischmann 481 and Soissons showed definitely contrasting tendencies both in grain number and grain weight. In the case of the Plainsman V and Mv Magma pair, the higher heat stress tolerance of Magma compared to Plainsman V was evident also from the grain number and weight of the main spike at each developmental phase.

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Section: Discussionmentioning

confidence: 99%

Heat stress response of wheat cultivars with different ecological adaptation

Bányai

Karsaï

Balla

et al. 2014

Cereal Research Communications

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“…In the present study path analysis was used to identify genotypes susceptible or tolerant to environmental constraints (rainfed and irrigated conditions) in the field and to detect their differential behaviour (Tai, 1990;Shpiler and Blum, 1991;Tai et al, 1994). This procedure is able to identify cultivars for drought conditions and to select tolerant parental lines for breeding new varieties with improved adaptability to drought and rainfed environments.…”

Section: Path Analysis Of Drought Susceptibility Indexmentioning

confidence: 99%

Path analysis of genotype × environment interaction in wheat-barley disomic addition lines

Farshadfar

2013

Acta Agronomica Hungarica

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In order to locate QTLs controlling the phenotypic stability and drought tolerance of yield and yield components in barley, seven disomic addition lines were sown together with their parents (donor and recipient) in a randomized complete block design with three replications under four rainfed and irrigated conditions. The descriptive diagram of yield and yield components exhibited a genotype (G) × environment (E) interaction and moderate variability over different environments, indicating the possibility of selection for stable and drought-tolerant entries. The AMMI stability value (ASV) and yield stability index (YSI) discriminated addition lines 2H and 4H as the most stable and droughttolerant.Path analysis revealed that the relative contribution of the number of seeds per plant (NSPP) (0.71) to grain yield (GY) was higher than that of the number of seeds per spike (SPS) (−0.44) and of thousand-seed weight (TSW) (-0.14). Therefore, the contribution of NSPP to the stability of GY over different environments was higher than that of other yield components. In other words, the instability of GY was caused by TSW and SPS in different environments. Path analysis on the drought susceptibility index revealed that most of the QTLs controlling drought tolerance and drought susceptibility in barley are located on chromosomes 3H and 6H, respectively.

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“…The effect of water restriction under rainfed conditions was more marked on the number of spikes m −2 and The percentage of decrease caused by drought is also shown. † Least significant difference at P = 0.05. grains spike −1 , traits that develop during the period most sensitive to drought occurrence, i.e., from double ridge to anthesis (Shpiler & Blum, 1991). Giunta et al (1993) also reported that severe water deficit around anthesis seriously influences wheat yield, reducing the number of spikes and spikelets and, therefore, decreasing plant fertility.…”

Section: Effect Of Water Stress On Grain Yield and Its Related Characmentioning

confidence: 99%

Yield Formation in Mediterranean durum wheats under two contrasting water regimes based on path-coefficient analysis

et al. 2005

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SummaryThe components of grain yield are altered by adverse growing conditions as the effects of certain environmental factors on crop growth and yield differ depending upon the developmental stages when these conditions occur. Path-coefficient analysis was used to investigate the main processes influencing grain yield and its formation under Mediterranean conditions. Twenty-five durum wheat genotypes, consisting of four Spanish commercial varieties and 21 inbred lines from the ICARDA durum wheat breeding program, were grown during 1997 and 1998 under both rainfed and irrigated conditions in southern Spain. Path-coefficient analysis revealed that under favourable conditions grain yield depended in equal proportion on the three primary yield components (i.e. spikes m −2 , grains spike −1 , and mean grain weight), whereas in the rainfed experiments, variations in grain yield were due mainly to spikes m −2 and to a lesser extent to grains spike −1 . Compensatory effects were almost absent under irrigated treatments; however, under water shortage, spikes m −2 exerted a negative influence on grain spike −1 due mainly to a negative interrelationship between tiller production and apical development. These compensatory effects could partially explain the restricted success in durum wheat breeding observed in water-limited environments of the Mediterranean region. Under rainfed conditions the number of spikes m −2 depended mainly on the ability for tiller production, whereas in the irrigated experiments the final number of spikes was determined mostly by tiller survival.

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Heat tolerance for yield and its components in different wheat cultivars

Cited by 81 publications

References 13 publications

Heat stress response of wheat cultivars with different ecological adaptation

Heat stress response of wheat cultivars with different ecological adaptation

Path analysis of genotype × environment interaction in wheat-barley disomic addition lines

Yield Formation in Mediterranean durum wheats under two contrasting water regimes based on path-coefficient analysis

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