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Global eQTL Mapping Reveals the Complex Genetic Architecture of Transcript-Level Variation in Arabidopsis

Open access
West, Marilyn A L, Kim, Kyunga, Kliebenstein, Daniel J, van Leeuwen, Hans, Michelmore, Richard W, Doerge, R W, St. Clair, Dina A·2007·Genetics

Abstract

The genetic architecture of transcript-level variation is largely unknown. The genetic determinants of transcript-level variation were characterized in a recombinant inbred line (RIL) population (n = 211) of Arabidopsis thaliana using whole-genome microarray analysis and expression quantitative trait loci (eQTL) mapping of transcript levels as expression traits (e-traits). Genetic control of transcription was highly complex: one-third of the quantitatively controlled transcripts/e-traits were regulated by cis-eQTL, and many trans-eQTL mapped to hotspots that regulated hundreds to thousands of e-traits. Several thousand eQTL of large phenotypic effect were detected, but almost all (93%) of the 36,871 eQTL were associated with small phenotypic effects (R2 < 0.3). Many transcripts/e-traits were controlled by multiple eQTL with opposite allelic effects and exhibited higher heritability in the RILs than their parents, suggesting nonadditive genetic variation. To our knowledge, this is the first large-scale global eQTL study in a relatively large plant mapping population. It reveals that the genetic control of transcript level is highly variable and multifaceted and that this complexity may be a general characteristic of eukaryotes.

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Metadata

Authors
West, M. A. L., Kim, K., Kliebenstein, D. J., van Leeuwen, H., Michelmore, R. W., Doerge, R. W., & St. Clair, D. A.
Venue
Genetics
Published
2007-03-01
Volume
175
Issue
3
Pages
1441-1450
ISSN
  • 0016-6731 (ISSN-L)
  • 1943-2631
OpenAlex
W2127801899
Cited by
374
References
4
FWCI
15.73
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Global eQTL Mapping Reveals the Complex Genetic Architecture of Transcript-Level Variation in Arabidopsis. https://app.cochat.ai/papers/10.1534/genetics.106.064972
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West, M. A. L., Kim, K., Kliebenstein, D. J., van Leeuwen, H., Michelmore, R. W., Doerge, R. W., & St. Clair, D. A. (2007). Global eQTL Mapping Reveals the Complex Genetic Architecture of Transcript-Level Variation in Arabidopsis. Genetics. https://doi.org/10.1534/genetics.106.064972

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