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Date of the monocot-dicot divergence estimated from chloroplast DNA sequence data.
Open accessAbstract
The divergence between monocots and dicots represents a major event in higher plant evolution, yet the date of its occurrence remains unknown because of the scarcity of relevant fossils. We have estimated this date by reconstructing phylogenetic trees from chloroplast DNA sequences, using two independent approaches: the rate of synonymous nucleotide substitution was calibrated from the divergence of maize, wheat, and rice, whereas the rate of nonsynonymous substitution was calibrated from the divergence of angiosperms and bryophytes. Both methods lead to an estimate of the monocot-dicot divergence at 200 million years (Myr) ago (with an uncertainty of about 40 Myr). This estimate is also supported by analyses of the nuclear genes encoding large and small subunit ribosomal RNAs. These results imply that the angiosperm lineage emerged in Jurassic-Triassic time, which considerably predates its appearance in the fossil record (approximately 120 Myr ago). We estimate the divergence between cycads and angiosperms to be approximately 340 Myr, which can be taken as an upper bound for the age of angiosperms.
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Kimura, M. (1980) · Journal of Molecular Evolution · doi:10.1007/bf01731581 · Cited by 29,778
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A nonparametric approach to estimating divergence times in the absence of rate constancy.
Sanderson, M. J. (1997) · Molecular Biology and Evolution · doi:10.1093/oxfordjournals.molbev.a025731 · Cited by 1,156
(1994) · Molecular Biology and Evolution · doi:10.1093/oxfordjournals.molbev.a040152 · Cited by 920
DNA sequence evidence for the segmental allotetraploid origin of maize
Gaut, B. S., & Doebley, J. F. (1997) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.94.13.6809 · Cited by 506
Genome-Wide Analysis of the GRAS Gene Family in Rice and Arabidopsis
Tian, C., Wan, P., Sun, S., Li, J., & Chen, M. (2004) · Plant Molecular Biology · doi:10.1023/b:plan.0000038256.89809.57 · Cited by 406
Metadata
- Authors
- Wolfe, K. H., Gouy, M., Yang, Y. W., Sharp, P. M., & Li, W. H.
- Venue
- Proceedings of the National Academy of Sciences
- Published
- 1989-08
- Volume
- 86
- Issue
- 16
- Pages
- 6201-6205
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- OpenAlex
- W2026363819
- Cited by
- 650
- References
- 1
- FWCI
- 38.73
- Type
- journal article
- Language
- en
- Open access
- green
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- Wolfe, K. H., Gouy, M., Yang, Y. W., Sharp, P. M., & Li, W. H. (1989). Date of the monocot-dicot divergence estimated from chloroplast DNA sequence data. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.86.16.6201
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