Genetic evidence for differential selection of grain and embryo weight during wheat evolution under domestication

Golan, Guy; Oksenberg, Adi; Peleg, Zvi

doi:10.1093/jxb/erv249

Cited by 45 publications

(53 citation statements)

References 68 publications

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“…Recent genetic studies have shown the potential for these wild species to provide useful genetic variation for grain weight that could possibly have been excluded from the gene pool during domestication (Golan et al ; Arora et al ; Avni et al ). The genome sequences and other genomic resources now available for many of these progenitor species and landraces will aid the identification of these novel genes and alleles (Avni et al ; Luo et al ; Wingen et al ).…”

Section: Interactionsmentioning

confidence: 99%

A reductionist approach to dissecting grain weight and yield in wheat

Brinton

Uauy

2019

JIPB

131

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Grain yield is a highly polygenic trait that is influenced by the environment and integrates events throughout the life cycle of a plant. In wheat, the major grain yield components often present compensatory effects among them, which alongside the polyploid nature of wheat, makes their genetic and physiological study challenging. We propose a reductionist and systematic approach as an initial step to understand the gene networks regulating each individual yield component. Here, we focus on grain weight and discuss the importance of examining individual sub‐components, not only to help in their genetic dissection, but also to inform our mechanistic understanding of how they interrelate. This knowledge should allow the development of novel combinations, across homoeologs and between complementary modes of action, thereby advancing towards a more integrated strategy for yield improvement. We argue that this will break barriers in terms of phenotypic variation, enhance our understanding of the physiology of yield, and potentially deliver improved on‐farm yield.

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Section: Interactionsmentioning

confidence: 99%

A reductionist approach to dissecting grain weight and yield in wheat

Brinton

Uauy

2019

JIPB

131

View full text Add to dashboard Cite

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“…Allaby et al, 2015;Dawson et al, 2013). In this context, a genetic approach-coupled to an experimental approach with, for example, varying nutrient or water availabilitywould help identify genes implicated behind those traits and highlight some future improvements of plant breeding (Golan, Oksenberg, & Peleg, 2015) and the design of crop mixture and intercropping systems.…”

Section: Implications For An Agroecological Rethinking Of Cereal Cumentioning

confidence: 99%

Shifts in plant functional strategies over the course of wheat domestication

Roucou

Violle

Fort

et al. 2017

Journal of Applied Ecology

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However, biophysical and ecophysiological constraints during vegetative growth are also at play and can strongly impact crop phenotypes. It has been argued that a broadened examination of crop phenotypes through a functional trait-based lens should improve our understanding of the domestication syndrome.2. We used a collection of 39 genotypes representative of key steps during tetraploid wheat domestication and grew them in a common garden experiment. We quantified the vegetative phenotype of each genotype through the measurements of 13 functional traits related to root, leaf and whole-plant dimensions.3. In modern cultivars, compared to ancestral forms, leaf longevity was shorter, while net photosynthetic rate, leaf production rate and nitrogen content were higher.Modern cultivars had a shallower root system and exhibited a larger proportion of fine roots, preferring to invest biomass above-rather than below-ground. We found ancestral forms to be integrated phenotypes characterized by coordination between above-and below-ground functioning. Conversely, in modern forms, human selection appeared to have broken this coordination and to have generated a new type of network of trait covariations.

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“…Most of the genetic mapping studies of DIC quantitative and qualitative traits were performed using tetraploid (AABB) segregating populations derived from crosses between DIC accessions and durum wheat cultivars (97). Chromosome substitution lines were used first to assign quantitative traits to individual DIC chromosomes (18) and then to map and clone QTLs based on recombinant substitution lines (45,136). DIC chromosome segments introgressed into a hexaploid (AABBDD) bread wheat background were also used (88).…”

Section: Genomic Dissection Of Drought Tolerance and Productivity In Dicmentioning

confidence: 99%

Evolution and Adaptation of Wild Emmer Wheat Populations to Biotic and Abiotic Stresses

Huang

Raats

Sela

et al. 2016

Annu. Rev. Phytopathol.

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The genetic bottlenecks associated with plant domestication and subsequent selection in man-made agroecosystems have limited the genetic diversity of modern crops and increased their vulnerability to environmental stresses. Wild emmer wheat, the tetraploid progenitor of domesticated wheat, distributed along a wide range of ecogeographical conditions in the Fertile Crescent, has valuable "left behind" adaptive diversity to multiple diseases and environmental stresses. The biotic and abiotic stress responses are conferred by series of genes and quantitative trait loci (QTLs) that control complex resistance pathways. The study of genetic diversity, genomic organization, expression profiles, protein structure and function of biotic and abiotic stress-resistance genes, and QTLs could shed light on the evolutionary history and adaptation mechanisms of wild emmer populations for their natural habitats. The continuous evolution and adaptation of wild emmer to the changing environment provide novel solutions that can contribute to safeguarding food for the rapidly growing human population.

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Genetic evidence for differential selection of grain and embryo weight during wheat evolution under domestication

Abstract: HighlightGenetic and phenotypic analysis of wild and domesticated tetraploid wheat suggests differential selection of grain and embryo weight during wheat evolution under domestication.

Cited by 45 publications

References 68 publications

A reductionist approach to dissecting grain weight and yield in wheat

A reductionist approach to dissecting grain weight and yield in wheat

Shifts in plant functional strategies over the course of wheat domestication

Evolution and Adaptation of Wild Emmer Wheat Populations to Biotic and Abiotic Stresses

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