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          Institute: MPI für Entwicklungsbiologie     Collection: Abteilung 6 - Molecular Biology (D. Weigel)     Display Documents

ID: 16330.0, MPI für Entwicklungsbiologie / Abteilung 6 - Molecular Biology (D. Weigel)
Quantitative trait loci controlling light and hormone response in two accessions of Arabidopsis thaliana
Authors:Borevitz, J. O.; Maloof, J. N.; Lutes, J.; Dabi, T.; Redfern, J. L.; Trainer, G. T.; Werner, J. D.; Asami, T.; Berry, C. C.; Weigel, D.; Chory, J.
Date of Publication (YYYY-MM-DD):2002-02
Title of Journal:Genetics
Journal Abbrev.:Genetics
Issue / Number:2
Start Page:683
End Page:696
Review Status:Peer-review
Audience:Not Specified
Abstract / Description:We have mapped quantitative trait loci (QTL) responsible for natural variation in light and hormone response between the Cape Verde Islands (Cvi) and Landsberg erecta (Ler) accessions of Arabidopsis thaliana using recombinant inbred lines (RILs). Hypocotyl length was measured in four light environments: white, blue, red, and far-red light and in the dark. In addition, white light plus gibberellin (GA) and dark plus the brassinosteroid biosynthesis inhibitor brassinazole (BRZ) were used to detect hormone effects. Twelve QTL were identified that map to loci not previously known to affect light response, as well as loci where candidate genes have been identified from known mutations. Some QTL act in all environments while others show genotype-by-environment interaction. A global threshold was established to identify, a significant epistatic interaction between two loci that have few main effects of their own. LIGHT1, a major QTL, has been confirmed in a near isogenic line (NIL) and maps to a new locus with effects in all light environments. The erecta mutation can explain the effect of the HYP2 QTL in the blue, BRZ, and dark environments, but not in far-red. LIGHT2, also confirmed in an NIL, has effects in white and red light and shows interaction with GA. The phenotype and map position of LIGHT2 suggest the photoreceptor PHYB as a candidate gene. Natural variation in light and hormone response thus defines both new genes and known genes that control light response in wild accessions.
Comment of the Author/Creator:Date: 2002, FEB
External Publication Status:published
Document Type:Article
Affiliations:MPI für Entwicklungsbiologie/Abteilung 6 - Molekulare Biologie (Detlef Weigel)
External Affiliations:Salk Inst Biol Studies, Plant Biol Lab, 10010 N Torrey Pines; Rd, La Jolla, CA 92037 USA; Univ Calif San Diego, Dept Biol, La Jolla, CA 92037 USA; Salk Inst Biol Studies, Howard Hughes Med Inst, La Jolla, CA 92037 USA; RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan; Univ Calif San Diego, Dept Family Prevent Med, La Jolla, CA 92093 USA
Identifiers:ISI:000174097600030 [ID No:1]
ISSN:0016-6731 [ID No:2]
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