Genetic Diversity of the Male and Species in Torreya Grandis Based on SRAP Analysis  

Haokai Liu1,2 , Hui Zhang1,3 , Wenchong Chen1 , Weiwu Yu1 , Wensheng Dai1 , Yanru Zeng1
1 The State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, 311300, China
2 Jingning Bureau of Natural Resources and Planning, Jingning She Autonomous County, 323500, China
3 Jingning Ecological and Forestry Development Center, Jingning She Autonomous County, 323500, China
Author    Correspondence author
International Journal of Molecular Ecology and Conservation, 2020, Vol. 10, No. 2   
Received: 06 Jul., 2020    Accepted: 08 Jul., 2020    Published: 10 Jul., 2020
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This article was first published in 《分子植物育种》(ISSN1672-416X,CN46-1068/S) 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.

Torreya grandis Fort. ex Lindl, a dioecious species, has a multitude of natural variation and great potential for selection and breeding. Naturally there exist some superior individuals which could be comparable to T. grandis “Merrillii”, an excellent cultivar vegetatively propagated from a superior natural variant from T. grandis. Development of T. grandis “Merrillii” industry, in addition to some historical reasons, has some effects on genetic diversity of the species. This paper analyzes SRAP marker-based genetic diversity of male populations from the same sampling sites as the female populations and genetic diversity at the species level in T. grandis with the maker data from both female and male populations. The result showed that male T. grandis populations had an abundant genetic diversity with a percentage of polymorphic loci (PPL%) of 63.67%, a number of alleles (Na) of 1.6367, an effective number of alleles (Ne) of 1.3813, a Nei’s gene diversity (H) of 0.2218, and a Shannon Information index (I) of 0.3311 and 81.48% of genetic variation existed among individuals within a population. Male T. grandis populations were not better than female populations in terms of genetic parameters. Both male and female acted on the rich genetic diversity of T. grandis at the species level. It is suggested that importance be attached to the conservation of genetic diversity in T. grandis, especially that of the male population, and selection of superior individuals could be conducted based on their good performance.

Torreya grandis; SRAP; Genetic variation

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International Journal of Molecular Ecology and Conservation
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. Haokai Liu
. Hui Zhang
. Wenchong Chen
. Weiwu Yu
. Wensheng Dai
. Yanru Zeng
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