Genetic diversity revealed by genomic-SSR and EST-SSR markers among common wheat, spelt and compactum

Abstract

In this study, two SSR molecular markers, named genomic-SSR and EST-SSR, are used to measure the genetic diversity among three hexaploid wheat populations, which include 28 common wheat (Triticum aestivum L.), 13 spelt (Triticum spelta L.), and 11 compactum (Triticum compactum Host.). The results show that common wheat has the highest genetic polymorphism, followed by spelt and then compactum. The mean genetic distance between the populations is higher than that within a population and similar tendency is detected for individual genomes A, B and D. Therefore, spelt and compactum can be used as potential germplasms for wheat breeding, especially for enriching the genetic variation in genome D. As compared with spelt, the genetic diversity between common wheat and compacturn is much smaller, indicating a closer consanguine relationship between these two species. Although the polymorphism revealed by EST-SSR is lower than that by genomic-SSR, it can effectively differentiate diverse genotypes as well. Togeth...