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H. V. Hunt, H. M. Moots, R. A. Graybosch, H. Jones, M. Parker, O. Romanova, M. K. Jones, C. J. Howe and K. Trafford, “Waxy Phenotype Evolution in the Allotetraploid Cereal Broomcorn Millet: Mutations at the GBSSI Locus in Their Functional and Phylogenetic Context,” Molecular Biology and Evolution, Vol. 30, No. 1, 2013, pp. 109-122. http://dx.doi.org/10.1093/molbev/mss209

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• TITLE: Development and Characterization of SSR Markers in Proso Millet Based on Switchgrass Genomics

  AUTHORS: Santosh G. Rajput, Tammy Plyler-Harveson, Dipak K. Santra

  KEYWORDS: Millet; Minor Crops; Comparative Genomics; Molecular Breeding

  JOURNAL NAME: American Journal of Plant Sciences, Vol.5 No.1, January 21, 2014

  ABSTRACT: Proso millet (Panicummiliaceum) has highwater use efficiency (WUE), a short growing-season, and is highly adapted to a semi-arid climate. Genomic resources for proso millet are very limited. Large numbers of DNA markers and other genomic tools in proso millet can readily be developed by using genomic resources in related grasses. The objectives of the present report were to 1) test and characterize switchgrass SSR markers for use in proso millet, and 2) elucidate repeat-motifs in proso millet based on new SSR marker analysis. A total of 548 SSR markers were tested on 8 proso millet genotypes. Out of these, 339 amplified SSR markers in proso millet. This showed that 62% of the switchgrass SSR markers were transferable to proso millet. Of these 339 markers, 254 were highly polymorphic among the 8 proso genotypes. The resolving power of these 254 polymorphic SSR markers ranged from 0.25-14.75 with an average of 2.71. The 254 polymorphic SSR markers amplified 984 alleles in the ranges of 50 bp to 1300 bp. The majority of the SSR markers (221 of 254) amplified dinucleotide repeats. Based on SSR marker analysis, AG/GA was the most abundant repeat-motifs in proso millet. Switchgrass genomic information seems to be the most useful for developing DNA markers in proso millet. Markers developed in this study will be helpful for linkage map construction, mapping agronomic traits and future molecular breeding efforts in proso millet.