TITLE:
Genetic Diversity Analysis of Cotoneaster schantungensis Klotz. Using SRAP Marker
AUTHORS:
Yan Ma, Suqing Qu, Xiurong Xu, Tingting Liang, Dekui Zang
KEYWORDS:
Cotoneaster schantungensis Klotz., Apomictic, SRAP, Genetic Diversity, Population
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.6 No.18,
November
18,
2015
ABSTRACT: In order to detect the genetic relationship of different Cotoneaster schantungensis natural populations,
16 samples were selected for genetic diversity analysis based on SRAP markers. Twelve
pairs primers were selected out, 93 bands were amplified, of which 91 bands (97.85%) were polymorphic.
At species level, the average value of Nei’s genetic diversity (H) was 0.2213, Shannon’s
information index (I) was 0.3596, whereas at population level, they were 0.1955, 0.3121, the percentage
of polymorphic loci was 75.27%. The genetic differentiation coefficient in populations
(Gst) was 0.0788, gene flow Nm was 5.8467, indicating that there was 7.88% of the variation
among populations and 92.12% of the variance within populations and the variation within populations
was relatively high. These results indicate that C. schantungensis has high genetic diversity
and low differentiation among populations. Although most Cotoneaster species are apomictic, C.
schantungensis, however, may be an exception.