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Theor Appl Genet. 2010 Jan;120(2):227-37. doi: 10.1007/s00122-009-1074-6.

QTL analysis of early stage heterosis for biomass in Arabidopsis.

Author information

1
Department of Molecular Genetics, Leibniz Institute of Plant Genetics and Crop Plant Research, Corrensstrasse 3, 06466 Gatersleben, Germany. meyer@ipk-gatersleben.de

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.

PMID:
19504257
PMCID:
PMC2793381
DOI:
10.1007/s00122-009-1074-6
[Indexed for MEDLINE]
Free PMC Article

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