Raising genetic yield potential in high productive countries: Designing wheat ideotypes under climate change

Senapati, Nimai; Brown, Hamish E.; Semenov, Mikhail A.

doi:10.1016/j.agrformet.2019.02.025

Cited by 48 publications

(16 citation statements)

References 90 publications

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“…This positive effect is higher in C3 plants such as wheat, rice and soybean, due to the limited photosynthetic output of photorespiratory carbon losses. Nevertheless, in the long term, the constant increment of CO 2 concentration will have a negative impact in the climate, thus counterbalancing the increase in crop yield (Specht et al, 1999;Long et al, 2004;Dong et al, 2018;Senapati et al, 2019;Wei et al, 2019). On the other hand, O 3 changes have significant negative effects on the yield of major agricultural crops.…”

Section: Climate Change Impact On Cropsmentioning

confidence: 99%

Root Growth Adaptation to Climate Change in Crops

et al. 2020

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Section: Climate Change Impact On Cropsmentioning

confidence: 99%

Root Growth Adaptation to Climate Change in Crops

et al. 2020

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“…By 2050, food demand of the global population (predicted to be > 9 billion) will increase by around 70% [ 15 ], UN, 2017). Increasing wheat yield is therefore crucial to ensure global food security [ 14 , 15 ]. Current evidence indicates that wheat yield under favourable conditions is mainly limited by sink strength [ 1 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Determination of wheat spike and spikelet architecture and grain traits using X-ray Computed Tomography imaging

et al. 2021

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Background Wheat spike architecture is a key determinant of multiple grain yield components and detailed examination of spike morphometric traits is beneficial to explain wheat grain yield and the effects of differing agronomy and genetics. However, quantification of spike morphometric traits has been very limited because it relies on time-consuming manual measurements. Results In this study, using X-ray Computed Tomography imaging, we proposed a method to efficiently detect the 3D architecture of wheat spikes and component spikelets by clustering grains based on their Euclidean distance and relative positions. Morphometric characteristics of wheat spikelets and grains, e.g., number, size and spatial distribution along the spike can be determined. Two commercial wheat cultivars, one old, Maris Widgeon, and one modern, Siskin, were studied as examples. The average grain volume of Maris Widgeon and Siskin did not differ, but Siskin had more grains per spike and therefore greater total grain volume per spike. The spike length and spikelet number were not statistically different between the two cultivars. However, Siskin had a higher spikelet density (number of spikelets per unit spike length), with more grains and greater grain volume per spikelet than Maris Widgeon. Spatial distribution analysis revealed the number of grains, the average grain volume and the total grain volume of individual spikelets varied along the spike. Siskin had more grains and greater grain volumes per spikelet from spikelet 6, but not spikelet 1–5, compared with Maris Widgeon. The distribution of average grain volume along the spike was similar for the two wheat cultivars. Conclusion The proposed method can efficiently extract spike, spikelet and grain morphometric traits of different wheat cultivars, which can contribute to a more detailed understanding of the sink of wheat grain yield.

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“…In sharp contrast with the current scenario, global wheat production should increase 1.8% per year to double by 2050 and thus secure sufficient supply for the growing world population [ 8 ]. Taking into consideration also the ongoing climate changes, wheat breeding today has to accomplish the hard task of providing good yielding varieties with the capacity of adapting to and coping with new abiotic and biotic stresses [ 9 ]. Climate changes not only contributed to modify the durum wheat conventional distribution areas and to increase the differential response of genotypes to environments by 49% since the mid-1980′s [ 10 ], but also exposed the crop to unfamiliar pathogens [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Small “Nested” Introgressions from Wild Thinopyrum Species, Conferring Effective Resistance to Fusarium Diseases, Positively Impact Durum Wheat Yield Potential

Kuzmanović

Giovenali

Ruggeri

et al. 2021

Plants

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Today wheat cultivation is facing rapidly changing climate scenarios and yield instability, aggravated by the spreading of severe diseases such as Fusarium head blight (FHB) and Fusarium crown rot (FCR). To obtain productive genotypes resilient to stress pressure, smart breeding approaches must be envisaged, including the exploitation of wild relatives. Here we report on the assessment of the breeding potential of six durum wheat-Thinopyrum spp. recombinant lines (RLs) obtained through chromosome engineering. They are characterized by having 23% or 28% of their 7AL chromosome arm replaced by a “nested” alien segment, composed of homoeologous group 7 chromosome fractions from Th. ponticum and Th. elongatum (=7el1L + 7EL) or from different Th. ponticum accessions (=7el1L + 7el2L). In addition to the 7el1L genes Lr19 + Yp (leaf rust resistance, and yellow pigment content, respectively), these recombinant lines (RLs) possess a highly effective QTL for resistance to FHB and FCR within their 7el2L or 7EL portion. The RLs, their null segregants and well-adapted and productive durum wheat cultivars were evaluated for 16 yield-related traits over two seasons under rainfed and irrigated conditions. The absence of yield penalties and excellent genetic stability of RLs was revealed in the presence of all the alien segment combinations. Both 7el2L and 7EL stacked introgressions had positive impacts on source and sink yield traits, as well as on the overall performance of RLs in conditions of reduced water availability. The four “nested” RLs tested in 2020 were among the top five yielders, overall representing good candidates to be employed in breeding programs to enhance crop security and safety.

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Raising genetic yield potential in high productive countries: Designing wheat ideotypes under climate change

Cited by 48 publications

References 90 publications

Root Growth Adaptation to Climate Change in Crops

Root Growth Adaptation to Climate Change in Crops

Determination of wheat spike and spikelet architecture and grain traits using X-ray Computed Tomography imaging

Small “Nested” Introgressions from Wild Thinopyrum Species, Conferring Effective Resistance to Fusarium Diseases, Positively Impact Durum Wheat Yield Potential

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