Project description:Microsatellites were developed for Astragalus bibullatus (Fabaceae), a federally endangered narrow endemic, to investigate reproductive ecology and species boundaries among closely related taxa. Next-generation sequencing was used to develop 12 nuclear microsatellite loci that amplify in A. bibullatus, as well as in A. crassicarpus var. trichocalyx, A. gypsodes, and A. tennesseensis. Identified loci were di- and trinucleotide repeats, with 1-15 alleles per locus. Observed and expected heterozygosities ranged from 0.000-0.938 and 0.000-0.860, respectively. Cross-amplification of three loci previously published in A. michauxii was also confirmed for the taxa included here. These data indicate the utility of novel microsatellite loci for conservation genetics and reproductive ecology in closely related Astragalus species.
Project description:Microsatellite primers were developed in scrub lupine (Lupinus aridorum, Fabaceae), an endemic species to Florida that is listed as endangered in the United States, to assess connectivity among populations, identify hybrids, and examine genetic diversity. We isolated and characterized 12 microsatellite loci polymorphic in scrub lupine or in closely related species (i.e., sky-blue lupine [L. diffusus] and Gulf Coast lupine [L. westianus]). Loci showed low to moderate polymorphism, ranging from two to 14 alleles per locus and 0.01 to 0.86 observed heterozygosity. These loci are the first developed for Florida species of lupine and will be used to determine differentiation among species and to aid in conservation of the endangered scrub lupine.
Project description:Microsatellite primers were developed to characterize and evaluate patterns of genetic diversity and structure in the endangered Mediterranean shrub Ziziphus lotus (Rhamnaceae). Twenty microsatellite primers were developed for Z. lotus, of which 14 were polymorphic. We evaluated microsatellite polymorphism in 97 specimens from 18 Spanish and seven Moroccan populations. Between two and eight alleles were found per locus, and the average number of alleles was 5.54. Observed heterozygosity and expected heterozygosity ranged from 0.08 to 0.90 and from 0.08 to 0.82, respectively. Nine of these primers also amplified microsatellite loci in Z. jujuba. The microsatellite markers described here will be useful in studies on genetic variation, population genetic structure, and gene flow in the fragmented habitat of this species. These markers are a valuable resource for designing appropriate conservation measures for the species in the Mediterranean range.
Project description:PremiseMicrosatellite markers were developed in the federally endangered species Liatris helleri (Asteraceae) to evaluate species boundaries with closely related congeners within the genus.Methods and resultsUsing Illumina data, 17 primer pairs were developed in populations of L. helleri. The primers amplified motifs from tri- to hexanucleotide repeats with one to 17 alleles per locus. Primers were also tested for cross-amplification in L. aspera, L. microcephala, and L. pycnostachya.ConclusionsThe developed primers for L. helleri serve as a novel genetic tool for future investigations in this genus, allowing for more explicit species delineation as well as population genetic analyses.
Project description:Microsatellite markers were developed for population genetic analysis in the rare shrub Styphelia longissima (Ericaceae). We generated ca. 2.5 million sequence reads using a Personal Genome Machine semiconductor sequencer. Using the QDD pipeline, we designed primers for >12,000 sequences with PCR product lengths of 80-480 bp. From these, 30 primer pairs were selected and screened using PCR; of these, 16 loci were found to be polymorphic, four loci were monomorphic, and 10 loci did not amplify reliably for S. longissima. For a sample of 57 plants from the only known population, the number of alleles observed for these 16 loci ranged from two to 21 and expected heterozygosity ranged from 0.49 to 0.91. These markers were also amplified in Astroloma xerophyllum, a closely related species. These markers will be used to characterize population genetic variation, spatial genetic structure, mating system parameters, and dispersal to aid in the management and conservation of the rare shrub S. longissima.
Project description:• Microsatellite primers were designed for Piptadenia gonoacantha (Fabaceae) and characterized to estimate genetic diversity parameters. The species is a native tree from the Atlantic Forest biome commonly used in forest restoration; it has medicinal potential and the wood is economically useful. • Twenty-eight microsatellite loci were identified from an enriched genomic library. Fifteen loci resulted in successful amplifications and were characterized in a natural population of 94 individuals. Twelve loci were polymorphic, with allele numbers ranging from three to 15 per locus, and expected and observed heterozygosities ranging from 0.2142 to 0.8325 and 0.190 to 0.769, respectively. • The developed markers will be used in further studies of population genetics of P. gonoacantha, aimed at conservation and management of the species in natural populations and in forest restoration projects.
Project description:Polymorphic microsatellite markers of Zanthoxylum schinifolium (Rutaceae), a promising medicinal plant with effective antibacterial, anticancer, and anti-inflammatory compounds, were developed and evaluated for further genetic studies based on genetic variation among individuals or populations. Following the selective hybridization method, microsatellite-enrichment libraries were constructed. Using these libraries, we obtained 15 polymorphic and three monomorphic microsatellite markers for Z. schinifolium. The number of alleles observed in each of the 15 polymorphic loci ranged from two to eight, and the observed and expected heterozygosities ranged from 0.070 to 0.677 and from 0.093 to 0.688, respectively. Eleven of these developed markers were successfully amplified for Z. piperitum, a related species. These microsatellite markers can be valuable tools for further genetic studies of Z. schinifolium, such as genetic resource conservation for maintaining breeding material and individual identification for breeding program improvement and variety management.
Project description:Although several microsatellite markers of Chamaecyparis obtusa (Cupressaceae) have been reported in previous studies, we newly developed and evaluated polymorphic microsatellite markers of C. obtusa, an economically important species in Korea as a major forestation tree species, for further genetic studies. Microsatellite-enrichment libraries were constructed according to the selective hybridization method. From this output, we obtained 10 polymorphic and five monomorphic microsatellite markers for C. obtusa. Five of these developed markers were successfully amplified for C. pisifera, a related species. These microsatellite markers can be valuable tools for further genetic studies of C. obtusa, and gathered genetic information may be useful for breeding program management.
Project description:We developed microsatellite markers in the legume Lens culinaris from publicly available databases to enrich the limited marker resource available for the crop. • Eighty-two primer sets were identified using expressed sequence sets of L. culinaris available in the National Center for Biotechnology Information (NCBI) database and were characterized in six species of Lens. Among them, 20 simple sequence repeat (SSR) primers produced no amplification product, 43 produced monomorphic products, and 19 were polymorphic. The primers amplified mono-, di-, tri-, tetra-, penta-, and hexanucleotide repeats with one to four alleles. These SSR loci successfully amplified in five related wild species, with a total of 61 primer pairs in L. nigricans and L. odemensis (98.39%), 59 in L. tomentosus (95.1%), and 60 in L. ervoides and L. orientalis (96.7%), respectively. • The microsatellite markers discovered in this study will be useful in genetic mapping, marker-assisted breeding, and characterization of germplasm.
Project description:Microsatellite markers can be used to evaluate population structure and genetic diversity in native populations of Indigofera pseudotinctoria (Fabaceae) and assess genetic disturbance caused by nonnative plants of the same species. We developed 14 markers for I. pseudotinctoria using next-generation sequencing and applied them to test two native populations, totaling 77 individuals, and a transplanted population, imported from a foreign country, of 17 individuals. The mean number of alleles was 3.310, observed heterozygosity was 0.242, and expected heterozygosity was 0.346. The fixation index in the transplanted population was 0.469, which was higher than in the native populations (0.154 and 0.158). In addition, the transplanted population contains one allele that is not shared by the native population. Microsatellite markers can be useful for evaluating genetic diversity within and between populations and for studying population genetics in I. pseudotinctoria and related species.