Analysis on the Genetic Diversity of Quercus aquifolioides at Different Altitudes
Our objective was to evaluate the genetic diversity of six populations of Quercus aquifolioides which distributed in different altitudes (2750～3500 m) of Jade Dragon Snow Mountain in the northwest of Yunnan Province.6 populations including 132 individuals at different altitudes were analyzed by simple sequence repeat (SSR) markers.The results showed that Shannon index (Ⅰ) and the Nei's gene diversity index (He) was 1.64 and 0.73,respectively,indicating Quercus aquifolioides had high genetic diversity at species level.The genetic diversity calculated by I was higher than estimated by He,but both of them agreed that the genetic diversity of six population varied with different altitude gradients:the level of genetic diversity from the altitudes of 2750 m to 3200 m was high,and it decreased at the altitude of 3200 m to 3500 m.Nei's genetic differentiation of Quercus aquifolioides Fst was 0.09 and AMOVA analysis (Phist=0.1363),indicating that a low level of genetic differentiation among populations.Gene flow among populations was 2.44,suggesting that high gene flow may be a main factor leading to high levels of the genetic diversity among populations.
NETL
NSTL
万方数据
维普
