Extensive Variation in Evolutionary Rate of Rbcl Gene Sequences Among Seed Plants

Authors

J. Bousquet
S.H. Strauss
A.H. Doerksen
R.A. Price

Document Type

Article

Journal/Book Title/Conference

Proceedings of the National Academy of Sciences of the United States of America

Volume

89

Issue

16

First Page

7844

Last Page

7848

Publication Date

1992

Abstract

Extensive variation in synonymous and nonsynonymous rates of substitution was observed among 50 sequences of the gene coding for the large subunit of ribulose-1,5-bisphosphate carboxylase (rbcL) representing bryophyte, conifer, dicot, and monocot taxa. Relative rate tests revealed rate differences of up to 138% for nonsynonymous substitutions and up to 85% for synonymous ones. Within angiosperms, the annual forms evolved more rapidly, on average, than perennial forms. This rate heterogeneity was more extensive at nonsynonymous sites than synonymous ones, and it resulted primarily from a recent acceleration of substitution rate in many groups of angiosperms.

Recommended Citation

Bousquet, J. et al. 1992. Extensive Variation in Evolutionary Rate of Rbcl Gene Sequences Among Seed Plants. Proceedings of the National Academy of Sciences of the United States of America. 89 (16): 7844-7848.