| Natural variation for seed dormancy in Arabidopsis is regulated by additive genetic and molecular pathways. | |
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MedLine Citation:
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PMID: 20145108 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Timing of germination is presumably under strong natural selection as it determines the environmental conditions in which a plant germinates and initiates its postembryonic life cycle. To investigate how seed dormancy is controlled, quantitative trait loci (QTL) analyses has been performed in six Arabidopsis thaliana recombinant inbred line populations by analyzing them simultaneously using a mixed model QTL approach. The recombinant inbred line populations were derived from crosses between the reference accession Landsberg erecta (Ler) and accessions from different world regions. In total, 11 delay of germination (DOG) QTL have been identified, and nine of them have been confirmed by near isogenic lines (NILs). The absence of strong epistatic interactions between the different DOG loci suggests that they affect dormancy mainly by distinct genetic pathways. This was confirmed by analyzing the transcriptome of freshly harvested dry seeds of five different DOG NILs. All five DOG NILs showed discernible and different expression patterns compared with the expression of their genetic background Ler. The genes identified in the different DOG NILs represent largely different gene ontology profiles. It is proposed that natural variation for seed dormancy in Arabidopsis is mainly controlled by different additive genetic and molecular pathways rather than epistatic interactions, indicating the involvement of several independent pathways. |
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Authors:
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Leónie Bentsink; Johannes Hanson; Corrie J Hanhart; Hetty Blankestijn-de Vries; Colin Coltrane; Paul Keizer; Mohamed El-Lithy; Carlos Alonso-Blanco; M Teresa de Andrés; Matthieu Reymond; Fred van Eeuwijk; Sjef Smeekens; Maarten Koornneef |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-02-09 |
Journal Detail:
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Title: Proceedings of the National Academy of Sciences of the United States of America Volume: 107 ISSN: 1091-6490 ISO Abbreviation: Proc. Natl. Acad. Sci. U.S.A. Publication Date: 2010 Mar |
Date Detail:
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Created Date: 2010-03-03 Completed Date: 2010-04-16 Revised Date: 2010-09-28 |
Medline Journal Info:
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Nlm Unique ID: 7505876 Medline TA: Proc Natl Acad Sci U S A Country: United States |
Other Details:
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Languages: eng Pagination: 4264-9 Citation Subset: IM |
Affiliation:
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Department of Molecular Plant Physiology, Utrecht University, 3584 CH Utrecht, The Netherlands. l.bentsink@uu.nl |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Arabidopsis
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embryology*,
genetics Arabidopsis Proteins / genetics Gene Expression Profiling Genetic Variation* Quantitative Trait Loci Seeds* |
| Chemical | |
Reg. No./Substance:
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0/Arabidopsis Proteins; 0/DOG1 protein, Arabidopsis |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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