Evaluation of selection strategies for wheat adaptation across water regimes

Kirigwi, Francis M.; Ginkel, M. van; Trethowan, Richard; Sears, R. G.; Rajaram, S.; Paulsen, Gary M.

doi:10.1023/b:euph.0000013375.66104.04

Cited by 101 publications

(56 citation statements)

References 29 publications

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“…The ability of a cultivar to produce satisfactory yield over a wide range of stress and non-stress environments is critical, since the ideal genotype should result in a high yield under stress as well as under optimum growing conditions [38]. The results of this study clearly indicated the positive effect of SI on grain yield.…”

Section: Effect On Grain Yield Above-ground Biomass and Harvest Indexmentioning

confidence: 62%

“…Moreover, chlorophyll content is considered a reliable indicator of WUE and adaptation to drought stress in wheat [36]. Therefore, the development of wheat cultivars that are able to use available water more efficiently and tolerate drought is a major goal for increasing wheat productivity under water-limited environments and countries should authorize policies that allocate water to adapt with climate change [10,[37][38][39].…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Supplemental Irrigation on Canopy Temperature Depression, Chlorophyll Content, and Water Use Efficiency in Three Wheat (Triticum aestivum L. and T. durum Desf.) Varieties Grown in Dry Regions of Jordan

et al. 2018

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Abstract:One critical challenge facing the world is the need to satisfy the food requirements of the dramatically growing population. Drought stress is one of the main limiting factors in the wheat-producing regions; therefore, wheat yield stability is a major objective of wheat-breeding programs in Jordan, which experience fluctuating climatic conditions in the context of global climate change. In the current study, a two-year field experiment was conducted for exploring the effect of four different water regimes on the yield, yield components, and stability of three wheat (Triticum aestivum L.; T. durum Desf.) Jordanian cultivars as related to Canopy Temperature Depression (CTD), and Chlorophyll Content (measured by Soil-Plant Analysis Development, SPAD). A split plot design was used in this experiment with four replicates. Water treatment was applied as the main factor: with and without supplemental irrigation; 0%, 50%, 75%, and 100% of field capacity were applied. Two durum wheat cultivars and one bread wheat cultivar were split over irrigation treatments as a sub factor. In both growing seasons, supplemental irrigation showed a significant increase in grain yield compared to the rain-fed conditions. This increase in grain yield was due to the significantly positive effect of water availability on yield components. Values of CTD, SPAD, harvest index, and water use efficiency (WUE) were increased significantly with an increase in soil moisture and highly correlated with grain yield. Ammon variety produced the highest grain yield across the four water regimes used in this study. This variety was characterized by the least thermal time to maturity and the highest values of CTD and SPAD. It was concluded that Ammon had the highest stability among the cultivars tested. Furthermore, CTD and SPAD can be used as important selection parameters in breeding programs in Jordan to assist in developing high-yielding genotypes under drought and heat stress conditions.

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Section: Effect On Grain Yield Above-ground Biomass and Harvest Indexmentioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

The Effect of Supplemental Irrigation on Canopy Temperature Depression, Chlorophyll Content, and Water Use Efficiency in Three Wheat (Triticum aestivum L. and T. durum Desf.) Varieties Grown in Dry Regions of Jordan

et al. 2018

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“…Besides, a high positive effect of alternating the selection between stressed and nonstressed environments on the adaptability and stability of the bread wheat breeding lines was proved by many studies (e.g. Le Gouis et al 2000;Kirigwi et al 2004;Saulescu et al 2005). This adaptability is based on a high degree of buffering capacity derived from the allohexaploid genome of wheat (Udall and Wendel 2006).…”

Section: Repeatability and Breeding Goalsmentioning

confidence: 99%

Comparison of bread wheat varieties with different breeding origin under organic and low input management

Mikó

Löschenberger²,

Hiltbrunner

et al. 2014

Euphytica

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In recent years needs have increased to investigate the necessity of breeding cereals for organic agriculture. The aims of this study were (1) to compare 37 bread wheat (Triticum aestivum L.) varieties with different breeding origin under low input conventional and certified organic farming conditions in Austria and Hungary for 3 years, (2) to identify traits highly sensitive to management systems that could be separated according to their suggested selecting environments and (3) to find evidence for the distinctness of organic wheat breeding. According to the results, seven out of the 15 traits assessed during this study showed significant management 9 genotype interaction meaning that these traits could be the basis of selection for different management systems.Heading date, sensitivity to leaf rust and powdery mildew had high repeatabilities. For economic reasons, it is therefore reasonable to select for these traits in conventional fields even if the selection target is organic agriculture. However, the present study suggests that selection for the other four traits (grain yield, test weight, leaf-inclination and vigorous growth during booting) should be done later in the target environment. The study compared groups of varieties developed by different breeding strategies (organic, conventional and combined strategies). The results of multivariate analyses showed that the organic breeding was distinct from the other two breeding strategies, but the combined and conventional breeding resulted in similar groupings. It is concluded that the selecting environment has measurable effects on the performance of bread wheat varieties under organic and low input growing conditions.

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“…The identification of genotypes that are tolerant to environmental stresses through classical breeding methods is difficult, because it is a characteristic with low heritability and is usually a genotype × environment interaction. This is in addition to the selection process usually occurring in differing conditions (Smith et al, 1990;Kirigwi et al, 2004). Thus, plant transformation has been demonstrated as an option for the development of wheat genotypes that are tolerant to drought, and are therefore more productive (Sahrawat et al, 2003).…”

Section: Wheat Resistance To Droughtmentioning

confidence: 99%

Wheat phenology and yield under drought: A review

Sarto¹,

Sarto²,

Rampim³

et al. 2017

Aust J Crop Sci

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The purpose of this review was to characterize the wheat crop phenology under drought conditions, at different stages of crop growth. Effects of drought on wheat plants are variable, and depend on the phenological stage of the plant as well as the duration, intensity and frequency of the drought. The crop evapotranspiration increases over the course of the phenological cycle, reaching a maximum in the growth stage (from the beginning of heading until the end of flowering), which is the most sensitive stage of the crop to drought. At ripening, the evapotranspiration decreases to save and allocate the energy to grain yield. The drought affects the plant density in the initial phase, tiller number per plant in the tillering phase, and plant height in the stretching phase, most severely. At the flowering stage, the processes related to fertilization and fixation of grain are most severely affected, i.e., the number of viable seeds per area decreases. In the grain formation stage, the ability of the source (leaf) to use and translocate the assimilates to the grain is most severely affected, thus affecting the grain weight.

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Evaluation of selection strategies for wheat adaptation across water regimes

Cited by 101 publications

References 29 publications

The Effect of Supplemental Irrigation on Canopy Temperature Depression, Chlorophyll Content, and Water Use Efficiency in Three Wheat (Triticum aestivum L. and T. durum Desf.) Varieties Grown in Dry Regions of Jordan

The Effect of Supplemental Irrigation on Canopy Temperature Depression, Chlorophyll Content, and Water Use Efficiency in Three Wheat (Triticum aestivum L. and T. durum Desf.) Varieties Grown in Dry Regions of Jordan

Comparison of bread wheat varieties with different breeding origin under organic and low input management

Wheat phenology and yield under drought: A review

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