Fig 1.
Fifty percent majority rule consensus tree resulting from Bayesian analysis of the ycf4 gene dataset.
Numbers above branches are posterior probability values. Values <50% were not shown.
Fig 2.
Presence and absence of the ycf4 and psaI genes in Lathyrus, Pisum and Vavilovia.
Red triangles on branches indicate evolutionary losses of the psaI gene. Psi symbols denote pseudogenes. Numbers indicate the numbers of codons in ycf4 gene. The topology of the tree is the result of Bayesian analysis of tribe Fabeae based on ycf4 gene. Numbers above branches are posterior probability values. Values <50% were not shown.
Fig 3.
JCoDA output using sliding window analysis of pairwise taxa dN/dS.
All parwise comparisons were performed using a window 100. All pairwise comparisons suggested positive selection of ycf4 in Lathyrus.
Fig 4.
Synonymous and nonsynonymous divergence in IRLC ycf4 sequences.
All trees are drawn to the same scale. Green branches in the dN and dS trees indicate taxa in which ycf4 gene represents positive selection and acceleration in evolutionary rate. Trees for matK and rpl32 genes do not show comparable rate at either synonymous or nonsynonymous divergence.
Table 1.
Sequence divergence in cpDNA regions compared among Lathyrus species.