Locus-specific view of flax domestication history

Crop domestication has been inferred genetically from neutral markers and increasingly from specific domestication-associated loci. However, some crops are utilized for multiple purposes that may or may not be reflected in a single domestication-associated locus. One such example is cultivated flax...

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Autores principales: Fu, Yong-Bi, Diederichsen, Axel, Allaby, Robin G
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Blackwell Publishing Ltd 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3297184/
https://www.ncbi.nlm.nih.gov/pubmed/22408732
http://dx.doi.org/10.1002/ece3.57
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author Fu, Yong-Bi
Diederichsen, Axel
Allaby, Robin G
author_facet Fu, Yong-Bi
Diederichsen, Axel
Allaby, Robin G
author_sort Fu, Yong-Bi
collection PubMed
description Crop domestication has been inferred genetically from neutral markers and increasingly from specific domestication-associated loci. However, some crops are utilized for multiple purposes that may or may not be reflected in a single domestication-associated locus. One such example is cultivated flax (Linum usitatissimum L.), the earliest oil and fiber crop, for which domestication history remains poorly understood. Oil composition of cultivated flax and pale flax (L. bienne Mill.) indicates that the sad2 locus is a candidate domestication locus associated with increased unsaturated fatty acid production in cultivated flax. A phylogenetic analysis of the sad2 locus in 43 pale and 70 cultivated flax accessions established a complex domestication history for flax that has not been observed previously. The analysis supports an early, independent domestication of a primitive flax lineage, in which the loss of seed dispersal through capsular indehiscence was not established, but increased oil content was likely occurred. A subsequent flax domestication process occurred that probably involved multiple domestications and includes lineages that contain oil, fiber, and winter varieties. In agreement with previous studies, oil rather than fiber varieties occupy basal phylogenetic positions. The data support multiple paths of flax domestication for oil-associated traits before selection of the other domestication-associated traits of seed dispersal loss and fiber production. The sad2 locus is less revealing about the origin of winter tolerance. In this case, a single domestication-associated locus is informative about the history of domesticated forms with the associated trait while partially informative on forms less associated with the trait.
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spelling pubmed-32971842012-03-09 Locus-specific view of flax domestication history Fu, Yong-Bi Diederichsen, Axel Allaby, Robin G Ecol Evol Original Research Crop domestication has been inferred genetically from neutral markers and increasingly from specific domestication-associated loci. However, some crops are utilized for multiple purposes that may or may not be reflected in a single domestication-associated locus. One such example is cultivated flax (Linum usitatissimum L.), the earliest oil and fiber crop, for which domestication history remains poorly understood. Oil composition of cultivated flax and pale flax (L. bienne Mill.) indicates that the sad2 locus is a candidate domestication locus associated with increased unsaturated fatty acid production in cultivated flax. A phylogenetic analysis of the sad2 locus in 43 pale and 70 cultivated flax accessions established a complex domestication history for flax that has not been observed previously. The analysis supports an early, independent domestication of a primitive flax lineage, in which the loss of seed dispersal through capsular indehiscence was not established, but increased oil content was likely occurred. A subsequent flax domestication process occurred that probably involved multiple domestications and includes lineages that contain oil, fiber, and winter varieties. In agreement with previous studies, oil rather than fiber varieties occupy basal phylogenetic positions. The data support multiple paths of flax domestication for oil-associated traits before selection of the other domestication-associated traits of seed dispersal loss and fiber production. The sad2 locus is less revealing about the origin of winter tolerance. In this case, a single domestication-associated locus is informative about the history of domesticated forms with the associated trait while partially informative on forms less associated with the trait. Blackwell Publishing Ltd 2012-01 /pmc/articles/PMC3297184/ /pubmed/22408732 http://dx.doi.org/10.1002/ece3.57 Text en © 2011 The Authors. Published by Blackwell Publishing Ltd. http://creativecommons.org/licenses/by/2.5/ This is an open access article under the terms of the Creative Commons Attribution Non Commercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
spellingShingle Original Research
Fu, Yong-Bi
Diederichsen, Axel
Allaby, Robin G
Locus-specific view of flax domestication history
title Locus-specific view of flax domestication history
title_full Locus-specific view of flax domestication history
title_fullStr Locus-specific view of flax domestication history
title_full_unstemmed Locus-specific view of flax domestication history
title_short Locus-specific view of flax domestication history
title_sort locus-specific view of flax domestication history
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3297184/
https://www.ncbi.nlm.nih.gov/pubmed/22408732
http://dx.doi.org/10.1002/ece3.57
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