PMID: 8587137Dec 1, 1995Paper

Comparison of the evolution of ribulose-1, 5-biphosphate carboxylase (rbcL) and atpB-rbcL noncoding spacer sequences in a recent plant group, the tribe Rubieae (Rubiaceae)

Journal of Molecular Evolution
J F Manen, A Natali

Abstract

Plastid sequences of the atpB-rbcL spacer and rbcL gene itself were used to evaluate their respective potential in reconstructing the phylogeny of 15 taxa from the tribe Rubieae (Rubiaceae). From our previous analyses using the atpB-rbcL spacer, the 15 selected taxa represent most of the variability of the tribe. Since this group is considered to be relatively recent (Upper Tertiary), it should allow the study of early dynamics of nucleotide substitutions in recent divergences. The results show that the spacer and rbcL inferred phylogenies are not totally congruent; the spacer trees are more similar to interpretations of morphological data. A comparative analysis of the pattern of nucleotide substitution of these two sequences in the Rubieae shows that (1) the overall rate of substitution is similar in the spacer and in rbcL, and the rate of synonymous substitution in rbcL is much higher; (2) the level of homoplasy is higher in rbcL than in the spacer matrix which shows a higher phylogenetic structure; and (3) the pattern of transition and transversion substitutions is different in the two sequences, and is not linear in rbcL. As a result of these observations, we suggest that (1) the spacer is evolving relatively slowly becaus...Continue Reading

Citations

Aug 24, 2013·PloS One·Michael J BaylyPauline Y Ladiges
Jan 18, 2007·The Plant Journal : for Cell and Molecular Biology·K Yoong LimAndrew R Leitch
Aug 27, 2005·Genome Génome / Conseil National De Recherches Canada·Hikmet BudakIsmail Dweikat
Sep 19, 2000·Molecular Biology and Evolution·F T BakkerM Gibby

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