The domestication of Helianthus annuus L. (sunflower)

Smith, Bruce D.

doi:10.1007/s00334-013-0393-3

Cited by 34 publications

(21 citation statements)

References 28 publications

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“…We recognize these loci track the maternal lineage and do not document the full domestication history of the sunflower, and our future studies where we obtain greater depth of coverage for many loci in the nuclear genomes of ancient and historic specimens will allow us to address more nuanced questions about the pace of domestication and specific targets of selection. Fortuitously, numerous desiccated archaeological specimens have been excavated from dozens of sites in the Ozarks and other parts of ENA (Fritz, ; Gilmore, ; Smith, ), thereby providing the means to identify genetic changes over millennia. Most of the specimens were excavated from rockshelters from 1920 to 1930 (Davis, ; Harrington, , , ), but some of these sites, including Eden's Bluff, have since been inundated by the construction of dams in the mid‐20th century or otherwise degraded (Fritz, ).…”

Section: Discussionmentioning

confidence: 99%

“…Fortuitously, numerous desiccated archaeological specimens have been excavated from dozens of sites in the Ozarks and other parts of ENA (Fritz, 1986;Gilmore, 1931;Smith, 2014), thereby providing the means to identify genetic changes over millennia. Most of the specimens were excavated from rockshelters from 1920 to 1930 (Davis, 1967;Harrington, 1924aHarrington, , 1924bHarrington, , 1960, but some of these sites, including Eden's Bluff, have since been inundated by the construction of dams in the mid-20th century or otherwise degraded (Fritz, 1986).…”

Section: Discussionmentioning

confidence: 99%

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Ancient DNA reveals the timing and persistence of organellar genetic bottlenecks over 3,000 years of sunflower domestication and improvement

Wales

Akman

Watson

et al. 2018

Evolutionary Applications

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Here, we report a comprehensive paleogenomic study of archaeological and ethnographic sunflower remains that provides significant new insights into the process of domestication of this important crop. DNA from both ancient and historic contexts yielded high proportions of endogenous DNA, and although archaeological DNA was found to be highly degraded, it still provided sufficient coverage to analyze genetic changes over time. Shotgun sequencing data from specimens from the Eden's Bluff archaeological site in Arkansas yielded organellar DNA sequence from specimens up to 3,100 years old. Their sequences match those of modern cultivated sunflowers and are consistent with an early domestication bottleneck in this species. Our findings also suggest that recent breeding of sunflowers has led to a loss of genetic diversity that was present only a century ago in Native American landraces. These breeding episodes also left a profound signature on the mitochondrial and plastid haplotypes in cultivars, as two types were intentionally introduced from other Helianthus species for crop improvement. These findings gained from ancient and historic sunflower specimens underscore how future in-depth gene-based analyses can advance our understanding of the pace and targets of selection during the domestication of sunflower and other crop species.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Ancient DNA reveals the timing and persistence of organellar genetic bottlenecks over 3,000 years of sunflower domestication and improvement

Wales

Akman

Watson

et al. 2018

Evolutionary Applications

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“…Most of the assemblages used to track plant domestication are charred, but variables such as the temperature of the fire, the distance from the source of heat, and the moisture, fat, and starch content of the seeds or other plant parts when they were burned are usually impossible to reconstruct. Experimental studies have been instrumental in alerting archaeobotanists to the variables and pitfalls involved (Wright, 2010; Smith, 2014). Claims of domestication based on morphology should optimally rest on multiple variables, such as shape, size, fruit or seed coat thickness, surface texture, and dehiscence mechanism, depending on the organism in question.…”

Section: Refining Methods and Integrating Techniquesmentioning

confidence: 99%

Agricultural origins from the ground up: Archaeological approaches to plant domestication

Langlie

Mueller

Spengler

et al. 2014

American J of Botany

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The timing, geographical locations, causes, and consequences of crop domestication have long been major concerns of archaeologists, and agricultural origins and dispersals are currently more relevant than ever to scientists seeking solutions to elusive problems involving food insecurity and global health disparities. Perennial research issues that archaeologists continue to tackle include (1) thinking outside centers of origin that were based on limited and insufficient past knowledge; (2) distinguishing between single and multiple domestications of specific crops; (3) measuring the pace of domestication; and (4) decoupling domestication from agricultural economies. Paleoethnobotanists have expanded their toolkits to include analysis of ancient and modern DNA and have added increasingly sophisticated techniques in the field and the laboratory to derive precise chronological sequences to assess morphological changes in ancient and often fragmentary archaeobotanical remains and to correctly interpret taphonomy and context. Multiple lines of archaeological evidence are ideally brought together, and whenever possible, these are integrated with information from complementary sources. We discuss current perspectives and anthropological approaches to research that have as their goals the fuller and broader understanding of ancient farming societies, the plants that were domesticated, the landscapes that were created, and the culinary legacies that were passed on.

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“…All modern domesticated sunflowers ( Helianthus annuus L.) can be traced back to a single center of domestication in the interior mid-latitudes of eastern North America [ 1 ]. The beginnings of domestication and the first steps of sunflower breeding date back to the time when it was cultivated by native Americans over 4000 years ago [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

Sunflower Genetics from Ancestors to Modern Hybrids—A Review

Radanović

Miladinović

Cvejić

et al. 2018

Genes

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Domestication and the first steps of sunflower breeding date back more than 4000 years. As an interesting crop to humans, sunflower underwent significant changes in the past to finally find its place as one of the most significant oil crops today. Substantial progress has already been made in understanding how sunflower was domesticated. Recent advances in molecular techniques with improved experimental designs contributed to further understanding of the genetic and molecular basis underlying the architectural and phenotypic changes that occurred during domestication and improvements in sunflower breeding. Understanding the domestication process and assessing the current situation concerning available genotypic variations are essential in order for breeders to face future challenges. A review of the tools that are used for exploring the genetic and genome changes associated with sunflower domestication is given in the paper, along with a discussion of their possible implications on classical sunflower breeding techniques and goals.

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The domestication of Helianthus annuus L. (sunflower)

Cited by 34 publications

References 28 publications

Ancient DNA reveals the timing and persistence of organellar genetic bottlenecks over 3,000 years of sunflower domestication and improvement

Ancient DNA reveals the timing and persistence of organellar genetic bottlenecks over 3,000 years of sunflower domestication and improvement

Agricultural origins from the ground up: Archaeological approaches to plant domestication

Sunflower Genetics from Ancestors to Modern Hybrids—A Review

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