In order to investigate the phylogeny of polyploid wheat, the genetic variation of α-amylase isozymes in 127 strains of two diploid wheat species and five
Aegilops species belonging to section Sitopsis was analyzed.
Three types of zymogram were detected in 39 strains of
Triticum monococcum and three other different types were detected in another diploid wheat,
T. urartu. Two varieties of
Ae. speltoides, var.
ligustica and var.
aucheri (subsection Truncata), were similar to each other and showed wide variation of zymograms. Sixteen strains of
Ae. longissima and 13 strains of
Ae. sharonensis were each grouped into four types. Ten strains of
Ae. bicornis were grouped into three types, each including three or four strains. On the other hand, zymograms from five strains of
Ae. searsii, which was formerly treated as a variety of
Ae. longissima, were very different from those of
Ae. longissima. In contrast to subsection Truncata, the zymogram types were rather simple and similar among species in subsection Emarginata (
Ae. longissima, Ae. sharonensis, and
Ae.bicornis) except for
Ae. searsii. Finally, the phylogeny of tetraploid wheat was discussed on the basis of the results presented here along with those of the previous authors.
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