Late‐season photosynthetic rate and senescence were associated with grain yield in winter wheat of diverse origins

Liang, Xi; Liu, Y.; Chen, J.; Adams, Curtis B.

doi:10.1111/jac.12231

Cited by 35 publications

(34 citation statements)

References 43 publications

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“…The authors revealed that the photosynthesis at these stages is determined by the size of the carbon sink which is genetically predefined. The suggestion for wheat breeders was subsequently to select for higher grain number, which is likely to come along with a prolongation of the ability to fill the grains (Liang et al, 2018). But besides leaf longevity, also the photosynthetic capacity is relevant for grain yield as shown here with the results of the SPAD measurements.…”

Section: Gcd and Grain Yield: Correlation Does Not Imply Causationmentioning

confidence: 67%

“…Therefore, the effect of grains per spike on total grain yield was in parts mediated by the extended canopy longevity. Similarly, in the study of Liang et al, 2018, the degree of senescence during grain filling was also negatively correlated to yield but not to thousand grain weight. The authors revealed that the photosynthesis at these stages is determined by the size of the carbon sink which is genetically predefined.…”

Section: Gcd and Grain Yield: Correlation Does Not Imply Causationmentioning

confidence: 79%

“…Additionally, especially for the central European wheat cultivars, the interdependencies of sink and source characteristics have to our knowledge not yet been tested in greater detail. Interestingly, there is evidence of a non-causal association between source and sink activities during grain filling and a possible link between a delayed senescence and sink size, namely grain number (Yin et al, 2009;Liang et al, 2018). In summary, one would at first glance assume a direct effect of the stay-green trait on thousand grain weight but there could also be a link from grain number to an extended availability of photosynthetic active materials.…”

Section: Introductionmentioning

confidence: 99%

“…After the seed number is determined, a reduction in source limitation can be achieved physiologically by extending the canopy longevity, or the capacity to stay green. Source limitation during the grain filling phase (after anthesis) can reduce the TGW Guo and Schnurbusch, 2015;Liang et al, 2018), indicating a negative effect of the source limitation after anthesis on the sink size, namely grain weight.…”

Section: Introductionmentioning

confidence: 99%

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Co-Evolution of Sink and Source in the Recent Breeding History of Winter Wheat in Germany

et al. 2020

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Optimizing the interplay between sinks and sources is of crucial importance for breeding progress in winter wheat. However, the physiological limitations of yield from source (e.g. green canopy duration, GCD) and sink (e.g. grain number) are still unclear. Furthermore, there is little information on how the source traits have been modified during the breeding history of winter wheat. This study analyzed the breeding progress of sink and source components and their relationships to yield components. Field trials were conducted over three years with 220 cultivars representing the German breeding history of the past five decades. In addition, genetic associations of QTL for the traits were assessed with genome-wide association studies. Breeding progress mainly resulted from an increase in grain numbers per spike, a sink component, whose variations were largely explained by the photosynthetic activity around anthesis, a source component. Surprisingly, despite significant breeding progress in GCD and other source components, they showed no direct influence on thousand grain weights, indicating that grain filling was not limited by the source strength. Our results suggest that, 1) the potential longevity of the green canopy is predetermined at the time point that the number of grains is fixed; 2) a coevolution of source and sink strength during the breeding history contribute to the yield formation of the modern cultivars. For future breeding we suggest to choose parental lines with high grain numbers per spike on the sink side, and high photosynthetic activity around anthesis and canopy duration on the source side, and to place emphasis on these traits throughout selection.

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Section: Gcd and Grain Yield: Correlation Does Not Imply Causationmentioning

confidence: 67%

Section: Gcd and Grain Yield: Correlation Does Not Imply Causationmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Co-Evolution of Sink and Source in the Recent Breeding History of Winter Wheat in Germany

et al. 2020

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“…It is proposed that a delay in flag leaf senescence greatly influences grain yield in cereal crops (Thomas and Howarth, 2000;Borrill et al, 2015). In wheat, early flag leaf senescence has been found to affect grain yield negatively (Gregersen et al, 2013) including under dryland conditions (Liang et al, 2018), while delayed flag leaf senescence is positively associated with higher grain yield (Verma et al, 2004) and harvest index (Carmo-Silva et al, 2017). Drought-tolerant varieties have a higher CO 2 uptake rate in the flag leaves which contributes to yield stability (Paul et al, 2016).…”

Section: Flag Leaf Senescencementioning

confidence: 99%

A Physio-Morphological Trait-Based Approach for Breeding Drought Tolerant Wheat

et al. 2020

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In the past, there have been drought events in different parts of the world, which have negatively influenced the productivity and production of various crops including wheat (Triticum aestivum L.), one of the world's three important cereal crops. Breeding new high yielding drought-tolerant wheat varieties is a research priority specifically in regions where climate change is predicted to result in more drought conditions. Commonly in breeding for drought tolerance, grain yield is the basis for selection, but it is a complex, late-stage trait, affected by many factors aside from drought. A strategy that evaluates genotypes for physiological responses to drought at earlier growth stages may be more targeted to drought and time efficient. Such an approach may be enabled by recent advances in high-throughput phenotyping platforms (HTPPs). In addition, the success of new genomic and molecular approaches rely on the quality of phenotypic data which is utilized to dissect the genetics of complex traits such as drought tolerance. Therefore, the first objective of this review is to describe the growth-stage based physio-morphological traits that could be targeted by breeders to develop droughttolerant wheat genotypes. The second objective is to describe recent advances in high throughput phenotyping of drought tolerance related physio-morphological traits primarily under field conditions. We discuss how these strategies can be integrated into a comprehensive breeding program to mitigate the impacts of climate change. The review concludes that there is a need for comprehensive high throughput phenotyping of physio-morphological traits that is growth stage-based to improve the efficiency of breeding drought-tolerant wheat.

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Impact of drought stress on spring wheat grain yield and quality

Yang

Marshall

et al. 2023

Agrosystems Geosci & Env

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Drought stress (DS) at different growth stages of spring wheat (Triticum aestivum L.) may affect its grain yield and end-use quality differently. The impact of drought stress at different growth stages on yield has been widely studied, but the impact on grain quality has not been thoroughly investigated. A 2-year field experiment was conducted to evaluate the effects of DS at different growth stages on end-use quality and grain yield in different spring wheat classes (soft white 'Alturas,' hard red 'Coho,' and hard white 'Dayn'). The treatments included DS (from tillering to stem elongation, booting to heading, and anthesis to soft dough) plus a fully irrigated (wellwatered) check. We found significant differences between the three wheat classes in most end-use quality parameters. Relative to the well-watered conditions, DS from tillering to stem elongation and from booting to heading did not affect grain yield and most end-use quality parameters. Flour protein, lactic acid and sucrose solvent retention capacities, and mixograph peak time were more impacted by post-anthesis DS. These changes in end-use quality were correlated and, thus, directly or indirectly affected baking performance. Our results indicate that reduced irrigation at early growth stages can maintain grain yield and end-use quality of spring wheat of different classes, for example, grain yield of 437 g m −2 and flour protein of 13.2-16.4 g kg −1 across different classes subject to DS at early growth stages compared to 379 g m −2 and 13.9-17.9 g kg −1 subject to post-anthesis DS.

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Late‐season photosynthetic rate and senescence were associated with grain yield in winter wheat of diverse origins

Cited by 35 publications

References 43 publications

Co-Evolution of Sink and Source in the Recent Breeding History of Winter Wheat in Germany

Co-Evolution of Sink and Source in the Recent Breeding History of Winter Wheat in Germany

A Physio-Morphological Trait-Based Approach for Breeding Drought Tolerant Wheat

Impact of drought stress on spring wheat grain yield and quality

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