Journal Article

PreJuSER-9361

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png QTL analysis of early stage heterosis for biomass in Arabidopsis

Meyer, R. C. ; Kusterer, B. ; Lisec, J. ; Steinfath, M. ; Becher, M.FZJ* ; Scharr, H.FZJ* ; Melchinger, A. E. ; Selbig, J. ; Schurr, U.FZJ* ; Willmitzer, L. ; Altmann, T.

2010
Springer Berlin

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Please use a persistent id in citations: doi:10.1007/s00122-009-1074-6

Abstract: The main objective of this study was to identify genomic regions involved in biomass heterosis using QTL, generation means, and mode-of-inheritance classification analyses. In a modified North Carolina Design III we backcrossed 429 recombinant inbred line and 140 introgression line populations to the two parental accessions, C24 and Col-0, whose F (1) hybrid exhibited 44% heterosis for biomass. Mid-parent heterosis in the RILs ranged from -31 to 99% for dry weight and from -58 to 143% for leaf area. We detected ten genomic positions involved in biomass heterosis at an early developmental stage, individually explaining between 2.4 and 15.7% of the phenotypic variation. While overdominant gene action was prevalent in heterotic QTL, our results suggest that a combination of dominance, overdominance and epistasis is involved in biomass heterosis in this Arabidopsis cross.

Keyword(s): Arabidopsis: genetics (MeSH) ; Arabidopsis: growth & development (MeSH) ; Biomass (MeSH) ; Genome, Plant (MeSH) ; Hybrid Vigor (MeSH) ; Inbreeding (MeSH) ; Phenotype (MeSH) ; Quantitative Trait Loci (MeSH) ; J

Note: We thank Anke Kalkbrenner, Cindy Marona, Melanie Teltow and Monique Zeh for excellent technical assistance and Katrin Seehaus and Dirk Zerning for plant cultivation. This project was supported by research grants of the Deutsche Forschungsgemeinschaft ( German Research Foundation) under priority research program "Heterosis in Plants'' to T. A. and R. C. M. (AL387/6-1, AL387/6-2, AL387/6-3), to A. E. M. (ME931/4-1, ME931/4-2, ME931/4-3), to L. W. (WI 550/3-2, WI 550/3-3), and to J. S. and M. S. (SE611/3-1), a grant of the European Community to T. A.(QLG2-CT-2001-01097),by the European Commission Framework Programme 6, Integrated Project: AGRON-OMICS-LSHG-CT2006-037704, and by the Max-Planck-Society.

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Research Program(s):

1. Terrestrische Umwelt (P24)

Appears in the scientific report 2010

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