Domesticated Sunflower in Fifth Millennium B.P. Temporal Context: New Evidence from Middle Tennessee

Crites, Gary D.

doi:10.2307/281459

Cited by 80 publications

(24 citation statements)

References 5 publications

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“…Lentz et al (2001a, b) argued for a single domestication of sunflower and speculated that the probable founders of domesticated sunflowers originated in Mexico, not the eastern US, as had been proposed earlier (Heiser 1985). Heiser (2001) disputed the hypothesis of a single domestication in Mexico (Lentz et al 2001a, b) and, on the basis of archaeological data from Middle Tennessee (Crites 1993), suggested the possibility of multiple domestication origins, a possibility supported by the analysis presented here (Figs. 4-6).…”

Section: Patterns Of Genetic Diversity In Domesticated and Wild Sunflsupporting

confidence: 60%

Microsatellites uncover extraordinary diversity in native American land races and wild populations of cultivated sunflower

2003

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The contemporary oilseed sunflower (Helianthus annuus L.) gene pool is a product of multiple breeding and domestication bottlenecks. Despite substantial phenotypic diversity, modest differences in molecular genetic diversity have been uncovered in anciently and recently domesticated sunflowers. The paucity of molecular marker polymorphisms in early analyses led to the hypothesis of a single domestication origin. Phylogenetic analyses were performed on 47 domesticated and wild germplasm accessions using 122 microsatellite loci distributed throughout the sunflower genome. Extraordinary allelic diversity was found in the Native American land races and wild populations, and progressively less allelic diversity was found in germplasm produced by successive cycles of domestication and breeding. Of 1,341 microsatellite alleles, 489 were unique to land races, exotic domesticates and wild populations, whereas only 15 were unique to elite inbred lines. The number of taxon-specific alleles was 35-fold greater among wild populations (26.27) than elite inbred lines (0.75). Microsatellite genotyping uncovered the possibility of multiple domestication origins. Land races domesticated by Native Americans of the southwestern US (Hopi and Havasupai) formed a clade independent of land races domesticated by Native Americans of the Great Plains and eastern US (Arikara and Seneca). Predictably, domestication and breeding have ratcheted genetic diversity down in sunflower. The contemporary oilseed sunflower gene pool, while not imperiled, could profit from an infusion of novel alleles from the reservoir of latent genetic diversity present in wild populations and Native American land races.

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Section: Patterns Of Genetic Diversity In Domesticated and Wild Sunflsupporting

confidence: 60%

Microsatellites uncover extraordinary diversity in native American land races and wild populations of cultivated sunflower

2003

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“…Chenopod and these presumably nondomesticated plants were used for their starchy seeds, sunflower and sumpweed for their oily seeds, and squash for its seeds and flesh. Along with recent genetic and archaeological literature on sunflower, sumpweed, and gourd/squash (Cucurbita pepo L.) (Asch and Asch, 1985;Cowan, 1997;Crites, 1993;Decker-Walters et al, 1993;Harter et al, 2004;Wills and Burke, 2006), our findings here provide compelling support for the development of an entirely indigenous agricultural complex in eastern North America. The crop complex developed from a diverse group of weedy taxa within the context of a mainly hunting and gathering lifestyle, and came to dominate Eastern Woodland archaeobotanical assemblages during the Woodland Period (Milner, 2004;Smith and Yarnell, 2009;Yarnell, 1974).…”

Section: Discussionsupporting

confidence: 71%

Ancient DNA confirms a local origin of domesticated chenopod in eastern North America

Kistler

Shapiro

2011

Journal of Archaeological Science

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“…Cultivated sunflower was domesticated from wild sunflower in the eastern United States more than 4000 years ago (Crites 1993;Harter et al 2004;Blackman et al 2011). While cultivated and wild sunflower are cross-compatible due to their common ancestry, domestication and continued selection has led to their differentiation in many morphological and fitness related traits (reviewed in Burke et al 2002b).…”

Section: Study Systemmentioning

confidence: 99%

Life history traits and phenotypic selection among sunflower crop–wild hybrids and their wild counterpart: implications for crop allele introgression

Kost

Alexander

Emry

et al. 2015

Evolutionary Applications

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Hybridization produces strong evolutionary forces. In hybrid zones, selection can differentially occur on traits and selection intensities may differ among hybrid generations. Understanding these dynamics in crop–wild hybrid zones can clarify crop-like traits likely to introgress into wild populations and the particular hybrid generations through which introgression proceeds. In a field experiment with four crop–wild hybrid Helianthus annuus (sunflower) cross types, we measured growth and life history traits and performed phenotypic selection analysis on early season traits to ascertain the likelihood, and routes, of crop allele introgression into wild sunflower populations. All cross types overwintered, emerged in the spring, and survived until flowering, indicating no early life history barriers to crop allele introgression. While selection indirectly favored earlier seedling emergence and taller early season seedlings, direct selection only favored greater early season leaf length. Further, there was cross type variation in the intensity of selection operating on leaf length. Thus, introgression of multiple early season crop-like traits, due to direct selection for greater early season leaf length, should not be impeded by any cross type and may proceed at different rates among generations. In sum, alleles underlying early season sunflower crop-like traits are likely to introgress into wild sunflower populations.

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Domesticated Sunflower in Fifth Millennium B.P. Temporal Context: New Evidence from Middle Tennessee

Cited by 80 publications

References 5 publications

Microsatellites uncover extraordinary diversity in native American land races and wild populations of cultivated sunflower

Microsatellites uncover extraordinary diversity in native American land races and wild populations of cultivated sunflower

Ancient DNA confirms a local origin of domesticated chenopod in eastern North America

Life history traits and phenotypic selection among sunflower crop–wild hybrids and their wild counterpart: implications for crop allele introgression

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