Plant domestication versus crop evolution: a conceptual framework for cereals and grain legumes

Abbo, Shahal; van-Oss, Ruth Pinhasi; Gopher, Avi; Saranga, Yehoshua; Ofner, Itai; Peleg, Zvi

doi:10.1016/j.tplants.2013.12.002

Cited by 285 publications

(237 citation statements)

References 86 publications

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“…Abbo et al (2014) propose that only traits showing a clear domesticated-wild dimorphism represent the pristine domestication episode, whereas traits with a clear phenotypic continuum between wild and domesticated gene pools cannot be used to discuss or to describe plant domestication and cannot provide support for a protracted domestication model because mostly reflect post-domestication diversification. In pea, the traits crucial in domestication are shattering, dormancy mediated by water-impermeable coats, seed size and vernalisation.…”

Section: Introductionmentioning

confidence: 99%

Analysis of variability and phylogeny in pisum (Pisum spp.) using digital phenotyping and morphological traits

Gatti¹,

Guindón²,

Bermejo³

et al. 2017

Aust J Crop Sci

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Plant phenotyping links genomics with plant ecophysiology and agronomy. It is usually performed by non-destructive, automated and image-based technology and generates information for efficient and searchable digital characterization of crop that can be performed during routine, periodical regeneration of accessions in germplasm collections. In the present work, ninety-two accessions of Pisum from different species and subspecies were studied during 2015 and 2016. Size and colour traits were measured using digital images from a Samsung CLX 3300 scanner and analysed with appropriate software; also seed weight, plant height and days to flowering were measured. Highly significant differences between accessions and species and subspecies for all these traits were found. When distances among species and subspecies are calculated, P. sativum subsp. sativum showed the greatest distance with P. fulvum (8.02) followed by P. abyssinicum (7.13); while the smallest distance was found between P. fulvum and P. sativum subsp. transcaucasicum (3.16). A Neighbour-joining tree with a cofenetic r of 0.985 was obtained. Seed and pod characteristics as colour parameters and size, obtained by digital phenotyping, have proved to be suitable markers for genetic diversity evaluation and they are useful in evolutionary analysis, allowing the discrimination of the main wild and cultivated species in the genus Pisum.Keywords: Pisum, seed coat colour, origin, variability, phenotyping, legumes. Abbreviations: a_and b-colour coordinates from the CieLab system of colour, C_ calibre of grains in centimetres, CR_ coincidence rate, CV%_ variation coefficient, DF_ days until 50% of plants flowering, L_ psychometric index of lightness from the CieLab system of colour; Max_ maximum , MD%_ mean difference percentage , Min_ minimum, PD_ pod diameter in centimetres, PH_ plant height in centimetres, PL_ pod length in centimetres, RBIP_ retrotransposon-based insertion polymorphisms markers, RGB_ red, green and blue, SD_ standard deviation , SSAP_ sequence-specific amplification polymorphism markers, VD%_ variance difference percentage, VR%_ variable rate of coefficient of variance, W100S_ weight of 100 seeds in grams.

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Section: Introductionmentioning

confidence: 99%

Analysis of variability and phylogeny in pisum (Pisum spp.) using digital phenotyping and morphological traits

Gatti¹,

Guindón²,

Bermejo³

et al. 2017

Aust J Crop Sci

View full text Add to dashboard Cite

show abstract

“…This human-associated cultivation reshaped the evolutionary trajectories of these species to become transformed into domesticated crops. These crops evolved over time and space as they spread to new areas (e.g., chickpea [41]), sometimes beyond the climatic niche of their wild relatives [7,42]. However, the speed and level of human intentionality during domestication remain topics of discussion [42,43].…”

Section: Domestication Has Left Signatures Both On Morphological As Wmentioning

confidence: 99%

“…These crops evolved over time and space as they spread to new areas (e.g., chickpea [41]), sometimes beyond the climatic niche of their wild relatives [7,42]. However, the speed and level of human intentionality during domestication remain topics of discussion [42,43]. It is commonly considered that at first there was wild harvesting, followed by conscious and unconscious selection to modify plant characteristics, and finally conscious selection of plant material for specific locations and uses, with the plant generally losing the ability to survive without human care [44].…”

Section: Domestication Has Left Signatures Both On Morphological As Wmentioning

confidence: 99%

The Impact of Genetic Changes during Crop Domestication

et al. 2018

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Abstract:Humans have domesticated hundreds of plant and animal species as sources of food, fiber, forage, and tools over the past 12,000 years, with manifold effects on both human society and the genetic structure of the domesticated species. The outcomes of crop domestication were shaped by selection driven by human preferences, cultivation practices, and agricultural environments, as well as other population genetic processes flowing from the ensuing reduction in effective population size. It is obvious that any selection imposes a reduction of diversity, favoring preferred genotypes, such as nonshattering seeds or increased palatability. Furthermore, agricultural practices greatly reduced effective population sizes of crops, allowing genetic drift to alter genotype frequencies. Current advances in molecular technologies, particularly of genome sequencing, provide evidence of human selection acting on numerous loci during and after crop domestication. Population-level molecular analyses also enable us to clarify the demographic histories of the domestication process itself, which, together with expanded archaeological studies, can illuminate the origins of crops. Domesticated plant species are found in 160 taxonomic families. Approximately 2500 species have undergone some degree of domestication, and 250 species are considered to be fully domesticated. The evolutionary trajectory from wild to crop species is a complex process. Archaeological records suggest that there was a period of predomestication cultivation while humans first began the deliberate planting of wild stands that had favorable traits. Later, crops likely diversified as they were grown in new areas, sometimes beyond the climatic niche of their wild relatives. However, the speed and level of human intentionality during domestication remains a topic of active discussion. These processes led to the so-called domestication syndrome, that is, a group of traits that can arise through human preferences for ease of harvest and growth advantages under human propagation. These traits included reduced dispersal ability of seeds and fruits, changes to plant structure, and changes to plant defensive characteristics and palatability. Domestication implies the action of selective sweeps on standing genetic variation, as well as new genetic variation introduced via mutation or introgression. Furthermore, genetic bottlenecks during domestication or during founding events as crops moved away from their centers of origin may have further altered gene pools. To date, a few hundred genes and loci have been identified by classical genetic and association mapping as targets of domestication and postdomestication divergence. However, only a few of these have been characterized, and for even fewer is the role of the wild-type allele in natural populations understood. After domestication, only favorable haplotypes are retained around selected genes, which creates a genetic valley with extremely low genetic diversity. These "selective sweeps" can allow mildly deleterious...

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“…Therefore reverse genetic approaches using TILLING (targeting induced local lesions in genomes) or genome editing to target these genes could be a feasible solution to the issue in exceptionally promising domesticates [42]. Non-shattering (loss of the seed dispersal mechanism such as pod dehiscence), is considered one of the crucial grain domestication traits because it prevents excess loss of seed, immediately increasing harvestable yield [60,61]. Pod indehiscence is common in grain legumes, and pod dehiscence should not be a disqualifying characteristic of candidate species because it has been routinely selected against in recent legume domestications [29,62].…”

Section: Field Managementmentioning

confidence: 99%

Perennial Grain Legume Domestication Phase I: Criteria for Candidate Species Selection

et al. 2018

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Annual cereal and legume grain production is dependent on inorganic nitrogen (N) and other fertilizers inputs to resupply nutrients lost as harvested grain, via soil erosion/runoff, and by other natural or anthropogenic causes. Temperate-adapted perennial grain legumes, though currently non-existent, might be uniquely situated as crop plants able to provide relief from reliance on synthetic nitrogen while supplying stable yields of highly nutritious seeds in low-input agricultural ecosystems. As such, perennial grain legume breeding and domestication programs are being initiated at The Land Institute (Salina, KS, USA) and elsewhere. This review aims to facilitate the development of those programs by providing criteria for evaluating potential species and in choosing candidates most likely to be domesticated and adopted as herbaceous, perennial, temperate-adapted grain legumes. We outline specific morphological and ecophysiological traits that may influence each candidate's agronomic potential, the quality of its seeds and the ecosystem services it can provide. Finally, we suggest that perennial grain legume breeders and domesticators should consider how a candidate's reproductive biology, genome structure and availability of genetic resources will determine its ease of breeding and its domestication timeline.

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Plant domestication versus crop evolution: a conceptual framework for cereals and grain legumes

Cited by 285 publications

References 86 publications

Analysis of variability and phylogeny in pisum (Pisum spp.) using digital phenotyping and morphological traits

Analysis of variability and phylogeny in pisum (Pisum spp.) using digital phenotyping and morphological traits

The Impact of Genetic Changes during Crop Domestication

Perennial Grain Legume Domestication Phase I: Criteria for Candidate Species Selection

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