Crop domestication in the Compositae: a family-wide trait assessment

Dempewolf, Hannes; Rieseberg, Loren H.; Cronk, Quentin

doi:10.1007/s10722-008-9315-0

Cited by 71 publications

(59 citation statements)

References 36 publications

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“…Whether or not the three general patterns described earlier extend to other types of crop remains to be seen (Gross and Olsen 2010). Within the Compositae there are two major crops, namely sunflower and lettuce (Dempewolf et al 2008). We study domestication traits in lettuce (Lactuca sativa), an annual vegetable crop grown for its leafy head rather than for its seeds (achenes).…”

Section: Introductionmentioning

confidence: 96%

QTL analysis reveals the genetic architecture of domestication traits in Crisphead lettuce

Hartman

Hooftman

Schranz

et al. 2012

Genet Resour Crop Evol

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The genetic architecture of crop domestication is generally characterized by three trends: relatively few genomic regions with major QTL effects are involved, QTL are often clustered, and alleles derived from the crop do not always contribute to the crop phenotype. We have investigated the genetic architecture of lettuce using a recombinant inbred line population from a cross between a crop Lactuca sativa ('Salinas') and its wild relative L. serriola. Few genomic regions with major QTL, plus various intermediate QTL, largely control the transition from wild to cultivated Crisphead lettuce. Allelic effects of all major QTL were in the expected direction, but there were intermediate QTL where the crop contributed to the wild phenotype and vice versa. We found two main regions with clusters of QTL, one on linkage group 3, where the crop allele induced lower seed output, another on linkage group 7, where the crop allele caused a delay in flowering time. Potentially, knowledge of genetic changes due to the domestication could be relevant for the chance that a transgene inserted in a crop genome will spread to wild relatives due to hitchhiking effects. If a transgene would be inserted in one of these regions, background selection on the crop alleles may lead to a reduced fitness of hybrids with the transgene. QTL research on the effects of domestication genes can thus indicate regions in the crop genome that are less likely to introgress, although these still need to be verified under field conditions.

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Section: Introductionmentioning

confidence: 96%

QTL analysis reveals the genetic architecture of domestication traits in Crisphead lettuce

Hartman

Hooftman

Schranz

et al. 2012

Genet Resour Crop Evol

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“…This remarkable success has been attributed to a variety of factors including an abundance and diversity of secondary metabolites that provide anti‐herbivory properties, a unique dual‐function fruit structure (achene) that facilitates long‐distance seed dispersal and inhibits herbivory, and a highly specialized head‐like inflorescence (capitulum) comprised of different flower types and genders (Funk et al, ). Compositae are also an excellent group for studying biogeography (Funk et al, ; Nie et al, ), pollen evolution, secondary chemistry, paleopolyploidy (Barker et al, , ), domestication (Dempewolf et al, ), and invasions (Lai et al, ).…”

Section: Introductionmentioning

confidence: 99%

The Compositae Tree of Life in the age of phylogenomics

Mandel

Barker

Bayer

et al. 2017

J of Sytematics Evolution

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Comprising more than 25 000 species, the Sunflower Family (Compositae or Asteraceae) is the largest family of flowering plants. Many of its lineages have experienced recent and rapid radiations, and the family has a deep and widespread history of large-scale gene duplications and polyploidy. Many of the most important evolutionary questions about the family's diversity remain unanswered due to poor resolution and lack of support for major nodes of the phylogeny. Our group has employed a phylogenomics approach using Hyb-Seq that includes sequencing 1000 low-copy number nuclear markers, plus partial plastomes for large numbers of species. Here we discuss our progress to date and present two phylogenies comprising nine subfamilies and 25 tribes using concatenated and coalescence-based analyses. We discuss future plans for incorporating high-quality reference genomes and transcriptomes to advance systematic and evolutionary studies in the Compositae. While we have made great strides toward developing tools for employing phylogenomics and resolving relationships within Compositae, much work remains. Recently formed global partnerships will work to solve the unanswered evolutionary questions for this megafamily.

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“…Noug has been described as semidomesticated (Dempewolf et al. ); the crop is self‐incompatible and highly branched, and flowering heads and seeds are less than one‐tenth the size of sunflower, its closest oil‐seed crop relative (Funk et al. ).…”

Section: Introductionmentioning

confidence: 99%

Patterns of domestication in the Ethiopian oil‐seed crop noug (Guizotia abyssinica)

Dempewolf

Tesfaye

Teshome

et al. 2015

Evolutionary Applications

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Noug (Guizotia abyssinica) is a semidomesticated oil-seed crop, which is primarily cultivated in Ethiopia. Unlike its closest crop relative, sunflower, noug has small seeds, small flowering heads, many branches, many flowering heads, and indeterminate flowering, and it shatters in the field. Here, we conducted common garden studies and microsatellite analyses of genetic variation to test whether high levels of crop–wild gene flow and/or unfavorable phenotypic correlations have hindered noug domestication. With the exception of one population, analyses of microsatellite variation failed to detect substantial recent admixture between noug and its wild progenitor. Likewise, only very weak correlations were found between seed mass and the number or size of flowering heads. Thus, noug's ‘atypical’ domestication syndrome does not seem to be a consequence of recent introgression or unfavorable phenotypic correlations. Nonetheless, our data do reveal evidence of local adaptation of noug cultivars to different precipitation regimes, as well as high levels of phenotypic plasticity, which may permit reasonable yields under diverse environmental conditions. Why noug has not been fully domesticated remains a mystery, but perhaps early farmers selected for resilience to episodic drought or untended environments rather than larger seeds. Domestication may also have been slowed by noug's outcrossing mating system.

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Crop domestication in the Compositae: a family-wide trait assessment

Cited by 71 publications

References 36 publications

QTL analysis reveals the genetic architecture of domestication traits in Crisphead lettuce

QTL analysis reveals the genetic architecture of domestication traits in Crisphead lettuce

The Compositae Tree of Life in the age of phylogenomics

Patterns of domestication in the Ethiopian oil‐seed crop noug (Guizotia abyssinica)

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