Ar: allelic richness; H O: observed
heterozygosity; H S: average heterozygosity;F IS: inbreeding coefficient.
Among the four group of OLa, OLb, OTc and OTd, Ar showed
OLb (1.528) > OTd (1.477) > OLa (1.456)
> OTc (1.447), H S was OLb (0.107)
> OTd (0.099) > OLa (0.096) > OTc
(0.090), and H o showed OLb (0.131) > OLa (0.126)
> OTd (0.125) > OTc (0.121). The OLb group had
highest genetic diversity among the four groups.
Between the two species, the values of Ar,H O and H S of O.
longilobus were 1.678, 0.128 and 0.104 respectively, which were higher
than 1.608, 0.123 and 0.096 of O. taihangensis . More, all the
diversity index of Opisthopappus species showed that a trend of
high in the middle and northern and southern end areas and low in other
regions (Fig. 3).