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teosinte branched1 and the origin of maize: evidence for epistasis and the evolution of dominance.
Abstract
Two quantitative trait loci (QTL) controlling differences in plant and inflorescence architecture between maize and its progenitor (teosinte) were analyzed. Complementation tests indicate that one of these, which is on chromosome arm 1L, is the locus for the maize mutant teosinte branched1 (tb1). This QTL has effects on inflorescence sex and the number and length of internodes in the lateral branches and inflorescences. This QTL has strong phenotypic effects in teosinte background but reduced effects in maize background. The second QTL, which is on chromosome arm 3L, affects the same traits as the QTL on 1L. We identify two candidate loci for this QTL. The effects of this QTL on several traits are reduced in both maize and teosinte background as compared to a maize-teosinte F2 population. Genetic background appears to affect gene action for both QTL. Analysis of a population in which both QTL were segregating revealed that they interact epistatically. Together, these two QTL substantially transform both plant and inflorescence architecture. We propose that tb1 is involved in the plant's response to local environment to produce either long or short branches and that maize evolution involved a change at this locus to produce short branches under all environments.
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Citations
Cited by
The evolution of apical dominance in maize
Doebley, J., Stec, A., & Hubbard, L. (1997) · Nature · doi:10.1038/386485a0 · Cited by 1,552
Self-citationThe Genetic Architecture of Quantitative Traits
Mackay, T. F. C. (2001) · Annual Review of Genetics · doi:10.1146/annurev.genet.35.102401.090633 · Cited by 1,106
Andersen, J. R., & Lübberstedt, T. (2003) · Trends in Plant Science · doi:10.1016/j.tplants.2003.09.010 · Cited by 796
The limits of selection during maize domestication
Wang, R.-L., Stec, A., Hey, J., Lukens, L., & Doebley, J. (1999) · Nature · doi:10.1038/18435 · Cited by 740
Self-citationMAX1 and MAX2 control shoot lateral branching in Arabidopsis
Stirnberg, P., van de Sande, K., & Leyser, H. M. O. (2002) · Development · doi:10.1242/dev.129.5.1131 · Cited by 692
Metadata
- Authors
- Doebley, J., Stec, A., & Gustus, C.
- Venue
- Genetics
- Publisher
- Oxford University Press (OUP)
- Published
- 1995-09-01
- Volume
- 141
- Issue
- 1
- Pages
- 333-346
- ISSN
- 0016-6731 (ISSN-L)
- 1943-2631
- OpenAlex
- W1926183048
- Cited by
- 758
- References
- 0
- FWCI
- 8.31
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: teosinte branched1 and the origin of maize: evidence for epistasis and the evolution of dominance. https://app.cochat.ai/papers/10.1093/genetics/141.1.333
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- Doebley, J., Stec, A., & Gustus, C. (1995). teosinte branched1 and the origin of maize: evidence for epistasis and the evolution of dominance. Genetics. https://doi.org/10.1093/genetics/141.1.333
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