Research Article

Study on Population Genetic Diversity Among Picea brachytyla in Jiuzhaigou County  

Jingyan Mo1 , Jian Peng2,3 , Yunjie Gu2 , Xiaoqing Li2
1 Administrative Office of Wujiao Nature Reserve of Sichuan Province, Jiuzhaigou, 623400, China
2 Research Institute of South Sichuan, Sichuan Academy of Forestry, Chengdu, 311400, China
3 Ecological Safety on the Upper Reaches of the Yangtze River, National Forestry and Grassland Administration Key Laboratory of Forest Resources Conservation, Sichuan Provincial Key Laboratory of Ecological Forestry Engineering on the Upper Reaches of the Yangtze River, Institute of Ecology & Forestry, Sichuan Agricultural University, Chengdu, 611130, China

Author    Correspondence author
International Journal of Molecular Evolution and Biodiversity, 2022, Vol. 12, No. 3   doi: 10.5376/ijmeb.2022.12.0003
Received: 20 Apr., 2022    Accepted: 28 Apr., 2022    Published: 05 May, 2022
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This article was first published in Molecular Plant Breeding in Chinese, and here was authorized to translate and publish the paper in English under the terms of Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Preferred citation for this article:

Mo J.Y., Peng J., Gu Y.J., and Li X.Q., 2022, Study on population genetic diversity among Picea brachytyla in Jiuzhaigou County, International Journal of Molecular Evolution and Biodiversity, 12(3): 1-11 (doi: 10.5376/ijmeb.2022.12.0003)


To study the genetic diversity and sampling strategy of natural Picea brachytyla populations and provide references for protecting their genetic diversity and resource utilization. In this study, the genetic diversity of six natural P. brachytyla population (90 individuals) were analyzed by genotyping-by-sequencing (GBS). The results showed that six populations could divided into three subsets with high, medium, and low elevation. POP1 belonged to low elevation subset, and mainly obtained individuals in TPG and JWC. POP2 belonged to medium elevation subset, which mainly obtained individuals in QZG and YLG. POP3 belonged to high elevation subset, and mainly obtained individuals in SXC and GGL. SXC was between subset POP2 and POP3, which had genetic communication with the two subsets. There were low genetic differentiation coefficient among six populations, showed a low level of genetic differentiation. The PIC value were all higher than 0.900, indicated that there were highly polymorphism in six populations. The observe heterozygosity and expect heterozygosity were 0.232~0.244 and 0.190~0.199, respectively, and there were no difference between populations, indicated that there remained low level of genetic diversity in P. brachytyla natural populations. The results of correlation analysis showed that there were negative correlation between genetic diversity and altitude, and latitude, and there were no correlation between genetic diversity and longitude. The genetic diversity were decreased with the increase of altitude (from JWC to GGL). This study would provide basis for P. brachytyla genetic conservation. The collection of resources in low altitude would be necessary in germplasm conservation of P. brachytyla.

Picea brachytyla; GBS; Genetic diversity; Genetic conservation
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International Journal of Molecular Evolution and Biodiversity
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