Limits and constraints to crop domestication

Stetter, Markus G

doi:10.1002/ajb2.1585

Cited by 8 publications

(12 citation statements)

References 25 publications

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“…Despite the amelioration of genetic load through gene flow with wild relatives, crop-wild hybrids are expected to perform poorly as crop. Gene flow therefore needs to have an overall beneficial effect that is higher than the destruction of domestication traits (Stetter 2020). This might be particularly possible in crops like grain amaranth where the domestication syndrome is only weakly pronounced (Stetter et al 2020).…”

Section: Discussionmentioning

confidence: 99%

“…While an accumulation of genetic load has been detected in many domesticated species, no increase has been detected in sorghum, potentially due to the transition to selfing in the crop (Lozano et al 2021). Gene flow from wild relatives with larger effective population size into crop populations might have reduced the genetic load (Stetter 2020). In sorghum gene flow between landraces resulted in decreased genetic load across landraces (Smith et al 2019).…”

Section: Introductionmentioning

confidence: 99%

“…2021). Gene flow from wild relatives with larger effective population size into crop populations might have reduced the genetic load (Stetter 2020). In sorghum gene flow between landraces resulted in decreased genetic load across landraces (Smith et al .…”

Section: Introductionmentioning

confidence: 99%

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Genetic incompatibilities and evolutionary rescue by wild relatives shaped grain amaranth domestication

Gonçalves-Dias

Singh

Graf

et al. 2023

Preprint

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Crop domestication and the subsequent expansion of crops have long been thought of as a linear process from a wild ancestor to a domesticate. However, evidence of gene flow from locally adapted wild relatives that provided adaptive alleles into crops has been identified in multiple species. Yet, little is known about the evolutionary consequences of gene flow during domestication and the interaction of gene flow and genetic load in crop populations. We study the pseudo-cereal grain amaranth that has been domesticated three times in different geographic regions of the Americas. We quantify the amount and distribution of gene flow along the genome of the three grain amaranth species and their two wild relatives. Our results show ample gene low between crop species and between crops and their wild relatives. Genetic load in introgressed regions from different donors suggest the potential of evolutionary rescue through decreased genetic load in genomic regions contributed by wild relatives with larger population size. To assess fitness of early hybrids we performed experimental crosses between the three crop species and found genetic incompatibilities between one Central American grain amaranth and the other two crop species. These incompatibilities might have created recent reproductive barriers, and maintain species integrity today. Together, our results show that gene flow played an important role in the domestication and expansion of grain amaranth, despite genetic species barriers. The domestication of plants was likely not linear and created a genomic mosaic by multiple contributors with varying fitness effects for today's crops.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Genetic incompatibilities and evolutionary rescue by wild relatives shaped grain amaranth domestication

Gonçalves-Dias

Singh

Graf

et al. 2023

Preprint

Self Cite

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“…The smaller size of the grain and presence of seed shattering and lodging habits indicate that fonio displays incomplete domestication (Abrouk et al., 2020), although the crop is well adapted to different growing conditions of West Africa. Furthermore, the low genetic variation for these traits could be attributed to the small ancestral population size compared to fully domesticated crop which showed a large effective population size at the time of domestication (Purugganan, 2019; Stetter, 2020). However, with data availability of functional standing genetic variation for fully domesticated crops, functional loci for those with incomplete domestication could be determined through comparative studies (Groen et al., 2020).…”

Section: Action Plan For Research and Development In Orphan Small Grain Millets With Focus On Foniomentioning

confidence: 99%

A review of the orphan small grain cereals improvement with a comprehensive plan for genomics‐assisted breeding of fonio millet in West Africa

Yerima

Achigan‐Dako

2021

Plant Breeding

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Orphan small grain cereals highly contribute to food and nutrition security worldwide, although the genetic and genomic resources for these cereals are far less available compared to major grain cereals. Consequently, there is low progress in their genetic improvement notwithstanding the high nutrient content, diversity, and health benefits of many of them. Therefore, additional efforts are expected to improve our understanding of the genes related to important agronomic traits. In this review, we provide an overview of achievements and bottlenecks in orphan small cereals improvement. We point out the need for the generation of basic knowledge that should guide the initial breeding process of orphan small cereals. Focusing on fonio, we showed how conventional breeding combined with advances in next‐generation sequencing technologies could potentially speed up the genetic improvement of the crop. Furthermore, a comprehensive action plan that integrates research, technological development and dissemination, and value chain improvement was illustrated in this review. These actions will foster the economy of West African fonio millet through wider cultivation, marketing, and consumption.

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“…Crops with similar uses display similar trait changes, coined the domestication syndrome. The domestication syndrome can be defined as the characteristic set of phenotypic traits associated with the genetic change to a domesticated form of an organism from a wild ancestral form [ 2 , 3 ].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Possible Contribution of Various Regulatory Genes to Determination of Carpel Number as a Potential Mechanism for Optimal Agricultural Yield

Abiri

Sinjushin

Tekdal

et al. 2022

IJMS

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Various regulatory genes encoding transcription factors and miRNAs regulate carpel number. Multicarpelly is normally associated with increased size of the floral meristem, and several genetic factors have been discovered that influence this characteristic. A fundamental understanding of the regulatory genes affecting carpel number can facilitate strategies for agricultural yield improvement, which is crucial, given that the global population is growing rapidly. A multicarpellate plant may provide a significantly higher yield than a plant bearing fewer carpels. Higher yields can be achieved via various means; in this review, we provide an overview of the current knowledge of the various regulatory factors that contribute to multicarpelly and the potential of increasing carpel number to achieve an increased yield.

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Limits and constraints to crop domestication

Cited by 8 publications

References 25 publications

Genetic incompatibilities and evolutionary rescue by wild relatives shaped grain amaranth domestication

Genetic incompatibilities and evolutionary rescue by wild relatives shaped grain amaranth domestication

A review of the orphan small grain cereals improvement with a comprehensive plan for genomics‐assisted breeding of fonio millet in West Africa

Evaluation of the Possible Contribution of Various Regulatory Genes to Determination of Carpel Number as a Potential Mechanism for Optimal Agricultural Yield

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