Genetic Diversity Assessment of Spanish and Some Endangered Tunisian Pea (Pisum sativum L.) Accessions Based on Microsatellite Markers (SSRs)

Abstract

In the current investigation, 28 accessions of Spanish and Tunisian peas were characterized by eight SSR polymorphic markers to assess their genetic diversity. Many methods have been applied to evaluate these relationships including diversity indices, analysis of molecular variance, cluster analysis, and population structure. The means of diversity indices, the polymorphism information content (PIC), the allelic richness, and the Shannon information index were 0.51, 3.87, and 0.9, respectively. These results revealed a large polymorphism (84.15 %) which produced a higher degree of genetic distance amongst the accessions. The unweighted pair group approach with arithmetic mean divided the collection of these accessions into three major genetic clusters. Therefore, this article has clearly demonstrated the usefulness of the SSR markers that can significantly contribute to the management and conservation of pea germplasm in these countries, as well as to future reproduction.

Analysis of the Conservation Status, Genetic Diversity and Population Structure of Endangered Ostrya rehderiana Resources Using SSR Markers

“…Genetic diversity is the basis of adaptation and evolution, and high levels of genetic diversity are conducive to the adaptation of species to new environments and climate change [31]. In this study, O. rehderiana showed a higher level of genetic diversity (He = 0.88; PIC = 0.86) than some endangered species, including Cycas taiwaniana [32], Nuphar shimadai [33], Pisum sativum [34] and Semiliquidambar cathayensis [35]. The ex situ conservation of O. rehderiana contributed to the preservation of genetic variation.…”