Identification and Validation of Intra-Species Transferability of Genome-Wide Functional SSR Markers in Glycine max - Cytology and Genetics

Abstract Genic codominant multiallelic markers are essential to identify the genetic variation, population diversity and evolutionary history of a species. Soybean (Glycine max) is a major legume crop having importance in both a protein-rich pulse as well as a high recovery oilseed crop. To date, no genome-wide genic SSR markers have been elucidated in this crop of high importance. This article aims to identify and validate regulatory gene-derived SSR markers in soybean. The coding sequences of Glycine max were downloaded from PlantTFDB and used for the identification, followed by the localization of SSRs by using a Perl 5 script (MISA, MIcroSAtellite identification tool). The flanking primers to SSRs were designed and chromosomal distribution and Gene ontology searches were performed using BLAST2GO. Twenty random SSR markers were validated to check cross-species transferability and genetic diversity study was performed. A set of 1138 simple sequence repeat markers from transcription factor coding genes were designed and designated as TF-derived SSR markers. They were anchored on 20 G. max chromosomes, and the SSR motif frequency was one per 4.64 kb. Trinucleotide repeats were found abundant and tetra, as well as pentanucleotide frequency, was least in soybean. Gene Ontology search revealed the diverse role of SSR-containing TFs in soybean. Eight soybean accessions were analyzed for identified twenty candidates for genic SSR diversification, and a principal co-ordinate analysis, a genic dissimilarity-based unweighted neighbour-joining tree, was constructed. Our findings will serve as a potential functional marker resource for marker-assisted selection and genomic characterization of soybean.

categoryCompare2/R/gocats.R at main · MoseleyBioinformaticsLab/categoryCompare2

Enables Gene Ontology (and other feature annotation) enrichment calculations and comparisons between feature sets. - MoseleyBioinformaticsLab/categoryCompare2

Happy DNA Day! Close ties between the HGP & GO

DNA Day is a celebration of the work of Franklin, Wilkins, Crick & Watson, published on this day in 1953. April is also the month the Human Genome Project (HGP) was declared complete, in 2003. But did you know that several of the people responsible for the HGP are also deeply involved in GO? David Botstein et al. laid down the framework for constructing genetic linkage maps using restriction fragment length polymorphisms in 1980. That work helped enable sequencing for the HGP. Some years late...

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