Molecular Biology and Evolution, Vol 15, 303-311, Copyright © 1998 by Society for Molecular Biology and Evolution
LE Saenz de Miera and M Perez de la Vega
Genes for vicilin, a component of legume seed storage proteins, have been
identified in the cultivated lentil (Lens culinaris ssp. culinaris) and in
wild species of the genus Lens. Five different types of vicilin sequences
(designated A-E) have been identified in each lentil individual. The
different types of sequences, and some possible variants of them (also
present in each individual) are part of the vicilin family of genes. Type D
sequences have the characteristics of nonprocessed pseudogenes. Comparison
of nucleotide sequences indicates that lentil vicilin sequences are similar
to vicilin sequences of other legume species, in particular to those of the
tribe Vicieae, in which the genes Lens is included. Sequence comparison and
distance and parsimony trees indicated that two groups or subfamilies of
sequences, including, respectively, types A, B, and E (47 kDa vicilins) and
types C and D (50 kDa), can be distinguished in lentil and other Vicieae
species, and that in the Vicieae species there is no evidence of concerted
evolution among the vicilin sequences of different gene subfamilies or
sequences groups, as has been suggested for other legume species.
ORIGINAL ARTICLE
A comparative study of vicilin genes in Lens: negative evidence of concerted evolution
Facultad de Biologia, Universidad de Leon, Spain.
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