Presumption on phy I ogenetic reIationship between the dicoty I edons and the monocotyledons - the first stage for invest i gating the origin of the monocotyIedons-

点击翻译按钮获取中文摘要

The results of presumption on the extant dicotyledons that are most closely related to the monocotyledons were not constant depending on the materials and methods used for the study. It was a group of Magnoliales and Laurales when we used a method of maximum parsimony with a material of Ceratophyllales. It was Piperales when we used maximum parsimony without Ceratophyllales. And, it was a group of Piperales, Magnoliales and Laurales when we used a method of maximum likelihood regardless of Ceratophyllales. However, the bootstrap values were low in all cases. Recently, it was often reported that it was a group of eudicots and Ceratophyllales. However, the present results did not support the relationship.