Reference "A tourist element in the 5'-flanking region of the catalase gene CatA reveals evolutionary relationships among Oryza species with various genome types"

Reference ID

1702

Title

A tourist element in the 5'-flanking region of the catalase gene CatA reveals evolutionary relationships among Oryza species with various genome types

Source

Molecular & General Genetics, 1999, vol. 262, pp. 493-500

Authors (5)

Iwamoto-M	Nagashima-H
Nagamine-T	Higo-H
Higo-K

Abstract

Tourist-OsaCatA, a transposable element, was found in the 5'-flanking region of
the rice gene CatA. The characteristics of this element are similar to those of
the other Tourist elements so far found in Oryza sativa. PCR and sequence
analyses of 37 accessions of 18 species revealed that all the Oryza species
examined, except for one accession, have either a full-length or a partial
Tourist element at this locus. Unlike the Tourist elements previously reported,
this Tourist element is found in all four Oryza species complexes in the Oryzeae
tribe. All AA genome Oryza species, except O. longistaminata, contain the full-
length Tourist element. O. longistaminata and the species of the O. officinalis,
O. meyeriana and O. ridleyi complexes contain the partial element. A
phylogenetic tree of Oryza species based on the nucleotide sequences of these
Tourist elements was constructed. The O. longistaminata accessions were placed
near the neighboring cluster of the officinalis complex. We propose that the
ancestor of O. longistaminata and that of other species with the AA genome
diverged, and the ancestor(s) of the O. officinalis, O. ridleyi and O. meyeriana
complexes then diverged from the ancestor of O. longistaminata in the course of
the evolution of the Oryza species. The Tourist elements associated with CatA
and its orthologs thus provide useful tools for examining evolutionary
relationships among Oryza species.