The Resurgence of Introgression Breeding, as Exemplified in Wheat Improvement

Hao, Ming; Zhang, Lianquan; Ning, Shunzong; Huang, Lin; Yuan, Zhongwei; Wu, Bihua; Yan, Zehong; Dai, Shoufen; Jiang, Bo; Zheng, Youliang; Liu, Dengcai

doi:10.3389/fpls.2020.00252

Cited by 68 publications

(38 citation statements)

References 111 publications

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“…Using identification by genetic identity we tracked the once common CIMMYT 1BL/1RS introgression to 6 HiBAP panel members (ST5). We also confirm that this original introgression remains intact in each instance, demonstrating the inability of homologous recombination when the effect of ph mutants is negated, restricting breakage of alien introgressions 37 .…”

Section: Recent Synthetic Wheat Contribution To D Genome Variation Ansupporting

confidence: 68%

Uncovering candidate genes involved in photosynthetic capacity using unexplored genetic variation in Spring Wheat

Joynson

Molero

Coombes

et al. 2020

Preprint

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To feed an ever-increasing population we must leverage advances in genomics and phenotyping to harness the variation in wheat breeding populations for traits like photosynthetic capacity which remains unoptimized. Here we survey a diverse set of wheat germplasm containing elite, introgression and synthetic derivative lines uncovering previously uncharacterised variation. We demonstrate how strategic integration of exotic material alleviates the D genome genetic bottleneck in wheat, increasing SNP rate by 62% largely due to Ae. tauschii synthetic wheat donors. Across the panel, 67% of the Ae.tauschii donor genome is represented as introgressions in elite backgrounds. We show how observed genetic variation together with hyperspectral reflectance data can be used to identify candidate genes for traits relating to photosynthetic capacity using association analysis. This demonstrates the value of genomic methods in uncovering hidden variation in wheat and how that variation can assist breeding efforts and increase our understanding of complex traits.

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Section: Recent Synthetic Wheat Contribution To D Genome Variation Ansupporting

confidence: 68%

Uncovering candidate genes involved in photosynthetic capacity using unexplored genetic variation in Spring Wheat

Joynson

Molero

Coombes

et al. 2020

Preprint

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“…However, in some genetic studies, 1RS decreased grain yield in drought environments ( Peake et al , 2011 ; Tahmasebi et al , 2015 ), revealing that effects of 1RS will depend on the environment and genetic background. Overall, several translocation lines have been developed but have not been used in wheat breeding due to their agronomically undesirable background ( Friebe et al , 1996 ; Kishii, 2019 ; Hao et al , 2020 ). Therefore, it is advantageous to change the background of these existing translocations through backcrossing.…”

Section: Improving Crop Design Targets For Key Production Regions By Modelling Historic and De Novo Big Data Setsmentioning

confidence: 99%

“…Less than 10% of wild relatives collected have presumably been used in interspecific crossing ( Friebe et al , 1996 ; Kishii, 2019 ; Hao et al , 2020 ), and fewer have been surveyed for genetic diversity of traits with potential to boost yield or climate resilience. In addition to developing synthetic hexaploid wheats, to help explore new sources of resilience, new amphiploids can be made (i.e.…”

Section: Improving Crop Design Targets For Key Production Regions By Modelling Historic and De Novo Big Data Setsmentioning

confidence: 99%

Harnessing translational research in wheat for climate resilience

Reynolds

Lewis

Ammar

et al. 2021

Journal of Experimental Botany

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Despite being the world’s most widely grown crop, research investments in wheat (Triticum aestivum and Triticum durum) fall behind those in other staple crops. Current yield gains will not meet 2050 needs, and climate stresses compound this challenge. However, there is good evidence that heat and drought resilience can be boosted through translating promising ideas into novel breeding technologies using powerful new tools in genetics and remote sensing, for example. Such technologies can also be applied to identify climate resilience traits from among the vast and largely untapped reserve of wheat genetic resources in collections worldwide. This review describes multi-pronged research opportunities at the focus of the Heat and Drought Wheat Improvement Consortium (coordinated by CIMMYT), which together create a pipeline to boost heat and drought resilience, specifically: improving crop design targets using big data approaches, developing phenomic tools for field-based screening and research, applying genomic technologies to elucidate bases of climate resilience traits, and applying these outputs in developing next-generation breeding methods. The global impact of these outputs will be validated through the International Wheat Improvement Network, a global germplasm development and testing system that contributes key productivity traits to ~half of the global wheat growing area.

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“…In fact, genetic introgression by translocation or hybridization with non‐native species has occasionally been described as a threat to conservation (Bohling, 2016; Rhymer & Simberloff, 1996). But the intentional introgression of specific traits to benefit existing populations has been successfully applied to agriculture (Hao et al, 2020; Zamir, 2001) and experimentally studied to elucidate evolutionary principles (Bradshaw & Schemske, 2003). Similar concepts of trait introgression for conservation are being investigated for enhancing tolerance of various species to changing climatic conditions (Aitken & Whitlock, 2013; Cleves et al, 2020).…”

Section: Figurementioning

confidence: 99%

Intentional introgression of a blight tolerance transgene to rescue the remnant population of American chestnut

Newhouse

Powell

2020

Conservat Sci and Prac

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In contrast to many current applications of biotechnology, the intended consequence of the American Chestnut Research & Restoration Project is to produce trees that are well‐adapted to thrive not just in confined fields or orchards, but throughout their natural range. Our primary focus is on disease tolerance, but we believe it will also be critically important that optimal restoration trees should have robust genetic diversity and resilience, which can be supplied by a full complement of their wild‐type genes. Chestnut restoration offers a unique case study because many restoration or intervention options have been attempted: doing nothing, planting non‐native chestnut species, planting hybrids, mutagenesis (exposing seeds to high levels of radiation to induce random mutations), backcross breeding, and now genetic engineering. Any of these techniques may be advantageous independently or in combinations, depending on the specific goals of land managers or restoration practitioners, but genetic engineering offers a unique opportunity to enhance blight tolerance while minimizing other changes to the genome.

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The Resurgence of Introgression Breeding, as Exemplified in Wheat Improvement

Cited by 68 publications

References 111 publications

Uncovering candidate genes involved in photosynthetic capacity using unexplored genetic variation in Spring Wheat

Uncovering candidate genes involved in photosynthetic capacity using unexplored genetic variation in Spring Wheat

Harnessing translational research in wheat for climate resilience

Intentional introgression of a blight tolerance transgene to rescue the remnant population of American chestnut

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