Development of genomic microsatellites in Gleditsia triacanthos (Fabaceae) using Illumina sequencing.

Abstract

• Premise of the study: Fourteen genomic microsatellite markers were developed and characterized in honey locust, Gleditsia triacanthos, using Illumina sequencing. Due to their high variability, these markers can be applied in analyses of genetic diversity and structure, and in mating system and gene flow studies.• Methods and Results: Thirty-six individuals from across the species range were included in a genetic diversity analysis and yielded three to 20 alleles per locus. Observed heterozygosity and expected heterozygosity ranged from 0.214 to 0.944 and from 0.400 to 0.934, respectively, with minimal occurrence of null alleles. Regular segregation of maternal alleles was observed at seven loci and moderate segregation distortion at four of 11 loci that were heterozygous in the seed parent.• Conclusions: Honey locust is an important agroforestry tree capable of very fast growth and tolerance of poor site conditions. This is the first report of genomic microsatellites for this species.