Study on Taxonomy of Medicago ruthenica L.Using ISSR
The relationship among Trigonella L.,Medicago ruthenica L.,Medicago sativa L.,Medicago falcata L.was analyzed using ISSR to further delimit the taxonomy of Medicago ruthenica L.The results showed that:Nei's gene diversity(h*)and Shannon's information index(I*)for Medicago ruthenica L.was the biggest among the materials which meant the higher genetic diversity,while,it was just opposite for Trigonella L..Gene difference index (Gst) among materials was 0.416 and gene flow index (Nm)was 0.703 which meant the bigger genetic differentiation level and the weaker gene flow.Compared with Trigonella L.,Medicago ruthenica L.had closer relationship with Medicago sativa L.and Medicago falcata L..So if there was no independent genus for Medicago ruthenica L.,Medicago ruthenica L.shoud belong to genus Medicago L.as a species and was appropriate as scientific name.