Using Genomic Approaches to Unlock the Potential of CWR for Crop Adaptation to Climate Change

Baute, Gregory J.; Dempewolf, Hannes; Rieseberg, Losren H.

doi:10.1002/9781118854396.ch15

Cited by 14 publications

(14 citation statements)

References 66 publications

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“…However, more analysis of heat tolerance mechanisms is required to elucidate heat tolerance. With the assumption that CWR are adapted to their environment of collection (Baute, Dempewolf, & Reisenberg, 2015) and that the reproductive period occurs in May–June, sources of heat tolerance in L. orientalis may occur in Turkmenistan especially, as well as Tajikistan and northern Syria. An alternative to large‐scale field testing is the prioritization of accessions according to the climatic history of their origin.…”

Section: Lentilmentioning

confidence: 99%

“…Identification of outlier markers can be facilitated using high throughput sequencing methods for genetic mapping and identification of candidate genes. Alleles adapted to specific abiotic stresses may be associated with such environments, a means of prioritizing CWR accessions for genetic analysis and introgression into elite crop cultivars (Baute et al, 2015; Sanderson et al, 2019).…”

Section: How To Effectively Use the Diversity Of Cwrs?mentioning

confidence: 99%

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Potential and limits of exploitation of crop wild relatives for pea, lentil, and chickpea improvement

Coyne¹,

Kumar²,

Wettberg

et al. 2020

Legume Science

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Legumes represent the second most important family of crop plants after grasses, accounting for approximately 27% of the world's crop production. Past domestication processes resulted in a high degree of relatedness between modern varieties of crops, leading to a narrower genetic base of cultivated germplasm prone to pests and diseases. Crop wild relatives (CWRs) harbor genetic diversity tested by natural selection in a range of environments. To fully understand and exploit local adaptation in CWR, studies in geographical centers of origin combining ecology, physiology, and genetics are needed. With the advent of modern genomics and computation, combined with systematic phenotyping, it is feasible to revisit wild accessions and landraces and prioritize their use for breeding, providing sources of disease resistances; tolerances of drought, heat, frost, and salinity abiotic stresses; nutrient densities across major and minor elements; and food quality traits. Establishment of hybrid populations with CWRs gives breeders a considerable benefit of a prebreeding tool for identifying and harnessing wild alleles and provides extremely valuable long-term resources. There is a need of further collecting and both ex situ and in situ conservation of CWR diversity of these taxa in the face of habitat loss and degradation and climate change. In this review, we focus on three legume crops domesticated in the Fertile Crescent, pea, chickpea, and lentil, and summarize the current state and potential of their respective CWR taxa for crop improvement.

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Section: Lentilmentioning

confidence: 99%

Section: How To Effectively Use the Diversity Of Cwrs?mentioning

confidence: 99%

Potential and limits of exploitation of crop wild relatives for pea, lentil, and chickpea improvement

Coyne¹,

Kumar²,

Wettberg

et al. 2020

Legume Science

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“…It is the genome of a sunflower CWR that will be ultimately utilized to improve the crop and not its phenotype, collection locality, or its history of local adaptation. With this in mind, CWR germplasm resources in gene banks may eventually be best explored, surveyed, or mapped at the level of the genome as we become better at predicting the breeding value of individual accessions and/or alleles (Baute et al, 2015a). Gene banks are important suppliers of genetic resources to the genomic research community, and access to the resulting genomic information will allow traditional gene bank users to better select genetic materials for their breeding and scientific programs (Finkers et al, 2015).…”

Section: Prospect Of Crop Wild Relatives Of Sunflowermentioning

confidence: 99%

Utilization of Sunflower Crop Wild Relatives for Cultivated Sunflower Improvement

2017

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Sunflower (Helianthus annuus L.) is one of the few crops native to the United States. The current USDA–ARS National Plant Germplasm System (NPGS) crop wild relatives sunflower collection is the largest extant collection in the world, containing 2519 accessions comprising 53 species—39 perennial and 14 annual. To fully utilize gene bank collections, however, researchers need more detailed information about the amount and distribution of genetic diversity present within the collection. The wild species are adapted to a wide range of habitats and possess considerable variability for most biotic and abiotic traits. This represents a substantial amount of genetic diversity available for many agronomic traits for cultivated sunflower, which has a very narrow genetic base. Sunflower ranked fifth highest among 13 crops of major importance to global food security surveyed from the mid‐1980s to 2005 in the use of traits from crop wild relatives. The estimated annual economic contribution of the wild species for cultivated sunflower is between US$267 to 384 million. Most of the value is derived from the PET1 cytoplasm from wild H. petiolaris, disease resistance genes, abiotic salt tolerance, and resistance to imidazolinone and sulfonylurea herbicides. Crop wild relatives provide a wide range of valuable attributes for traditional and molecular breeding, as well as for ecological experimentation, and have enabled rapid advances in ecological and evolutionary genetics. The wild species of Helianthus continue to contribute specific traits to combat emerging pests and environmental challenges and, at the same time, are preserved for future generations.

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“…Researchers have suggested methods to introgress useful traits from teosinte into maize breeding pools, including sequential backcrosing (Casas‐Salas et al, 2001), joint multiple population analysis, genomewide association study (GWAS), and genomic selection via high throughput sequencing and genotyping technologies (Sood et al, 2014; Baute et al, 2015). A useful review on prebreeding maize × teosinte population crosses can be found in Ortiz (2015).…”

Section: Case 2: Maizementioning

confidence: 99%

The Use of Crop Wild Relatives in Maize and Sunflower Breeding

et al. 2017

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Conservation of crop wild relatives (CWR) has always been predicated on the promise of new and useful traits, and thus modern genetics and genomics tools must help fulfill the promise and continue to secure the conservation of these resources. However, the vast genetic potential present in CWR is often difficult to tap, as identification of superior alleles can be hampered by the effects of the environment on expression of these alleles and masked in different genetic backgrounds; transfer of superior alleles into breeding pools to create new crop varieties can be slow and expensive. Some crop species have been more amenable to introgression of traits from wild relatives than others. In some cases, these species may be less diverged from their wild ancestors, which become a good source of mono‐ to oligogenic traits, many of which are more qualitative in nature, and sometimes of quantitative traits. Sunflower (Helianthus annuus L.) is an introgression success story, and many traits, including cytoplasmic male sterility, herbicide tolerance, drought and biotic stress resistance, and modified fatty acid profiles, have been introgressed into the cultivated gene pool from wild relatives without depression of oil yield and quality. Others, including maize (Zea mays L.), have shown little progress in widening the cultivated gene pool using exotic sources due to temporary yield depression, potential for loss of quality, and disturbance of current logistical habits. Here, we review the breeding history of sunflower and maize and explore variables that have limited the use of CWR in some species and allowed success in others. Surprisingly, in both sunflower and maize, biological limitations are similar and smaller than expected and appear to be surmountable with sufficient determination. Possible new technologies and policies to allow a deeper mining of these genetic resources in all crop species are discussed.

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Using Genomic Approaches to Unlock the Potential of CWR for Crop Adaptation to Climate Change

Cited by 14 publications

References 66 publications

Potential and limits of exploitation of crop wild relatives for pea, lentil, and chickpea improvement

Potential and limits of exploitation of crop wild relatives for pea, lentil, and chickpea improvement

Utilization of Sunflower Crop Wild Relatives for Cultivated Sunflower Improvement

The Use of Crop Wild Relatives in Maize and Sunflower Breeding

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