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ISSR Analysis of Genetic Diversity and Structure of Plum Varieties Cultivated in Southern China

1,2, 1,2,*, 1,2,3 and 4,*
1
Institute of Subtropical Fruit, Fujian Agriculture and Forestry University, Fuzhou 350002, China
2
College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
3
Institute of Plant Biology, National Taiwan University, Taipei 106, Taiwan
4
Mid-Florida Research and Education Center, University of Florida, IFAS, Apopka, FL 32703, USA
*
Authors to whom correspondence should be addressed.
Received: 17 October 2018 / Revised: 10 December 2018 / Accepted: 11 December 2018 / Published: 21 December 2018
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Abstract

Plums (Prunus spp.) are important deciduous fruit crops in the world. China is a major producer of P. salicina Lindl., but the genetic relationship of Chinese plums in key production regions remain unclear. In this study, 14 University of British Columbia (UBC) inter simple sequence repeats (ISSR) primers were used to analyze 33 plum varieties cultivated in Fujian Province to determine their genetic diversity and population structure. A total of 146 bands were generated, of which 130 were polymorphic. Mean percentage of polymorphic bands was 89.04%, Shannon’s information index value was 0.38, and the Nei’s genetic index value was 0.24. Using unrooted trees (Neighbor-Joining method), 33 varieties were classified into four groups. Split graph separated them into two major groups, each with two subgroups. The two phylogenetic trees indicate that environmental or natural selection pressure is an important factor influencing their genetic relationship. Analysis of population structure revealed that they have frequent genetic exchanges among closed subpopulations; thus, genetic variation mainly occurs within the population. Additionally, based on the phylogenetic analysis and unique morphological characteristics of fruits, we propose that the Chinese landrace Nai could contribute significantly to development of the famous variety Wickson. View Full-Text
Keywords: Chinese plums; genetic diversity; genetic structure; Prunus salicina; simple-sequence repeat markers (ISSR); plum Chinese plums; genetic diversity; genetic structure; Prunus salicina; simple-sequence repeat markers (ISSR); plum
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Wu, W.; Chen, F.; Yeh, K.; Chen, J. ISSR Analysis of Genetic Diversity and Structure of Plum Varieties Cultivated in Southern China. Biology 2019, 8, 2.

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