پديدآورندگان :
Teng Y. ywteng@zju.edu.cn Department of Horticulture, Zhejiang University, Hangzhou 310058, Zhejiang, PR China, The Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, the Ministry of Agriculture, Hangzhou 310058, Zhejiang, PR China , Liu J. Department of Horticulture, Zhejiang University, Hangzhou 310058, Zhejiang, PR China, The Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, the Ministry of Agriculture, Hangzhou 310058, Zhejiang, PR China , Hu C. Department of Horticulture, Zhejiang University, Hangzhou 310058, Zhejiang, PR China, The Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, the Ministry of Agriculture, Hangzhou 310058, Zhejiang, PR China
كليدواژه :
Genetic diversity , Pollen flow , Populations , Pyrus pashia
چكيده فارسي :
In this study, a total of 327 individuals of Pyrus pashia were sampled from over 22 populations mainly from Yunnan Province of China. The genetic diversity and population structure of P. pashia were analyzed using 13 nSSR makers. Pyrus pashia contained a relatively high level of genetic diversity (He =0.741). AMOVA analysis of molecular variance indicated that the genetic variation of P. pashia mainly existed within populations, representing 91.24% of the total variation. The Mantel test showed that geographic distance was an important factor to shape the current population genetic structure (r=0.783, p=0.000). Four gene pools dominating in four different geographic populations of P. pashia were identified based on STRUCTURE analysis. According to the Ennos’ formula, pollen flow was 6.05 times more than seed flow. Population YN8 represented the highest genetic diversity of P. pashia and should have the priority when conservation strategy is implemented.
