Since traditional taxonomic studies possess intrinsic limitations with plant species identification, combinations of DNA barcodes have been considered a powerful tool to discover undetected genetic variation within species across large geographic areas, providing more precise estimates of biodiversity. However, the lack of efficient and universal markers is often considered a peculiar challenge in molecular taxonomic studies across plant taxa. Similarly, many loci have been proposed for DNA barcodes; still standardizing regions as a DNA barcode is vital for making them efficiently discriminate plant species. In this study, we tested the phylogenetic utility of nuclear (nrDNA) region (ITS2) with chloroplast (cpDNA) regions (matK, psbA-trnH, and rbcL) for efficient discrimination of Triticum species. A total of 109 accessions representing 16 recognized genotypes in the Triticum genus have been sampled to assess the efficiency of barcoding loci to resolve species discrimination. As expected from earlier studies, our results also revealed that a single locus has difficulty in discriminating Triticum species. Species discrimination in Triticum taxa was martially improved by using a combination of gene loci; however, the closely related species, T. aestivum and T. turgidum, had no DNA barcode to separate them. Thus, we recommend further research on finding species-specific SNP using intragenic regions as standard DNA barcode loci in Poaceae.

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Capsicum chinense is one of the five domesticated pepper species belonging to the Solanaceae family. Capsicum sp. have been used as model systems in comparative and evolutionary genomics because their superior availability of chloroplast genome in the solanaceae family. Similarly, molecular markers derived from the complete chloroplast genome can provide effective tools for species identification and phylogenetic resolution. So far however, only partial taxonomic and phylogenetic analyses have been carried out for the genus. Thus, the complete chloroplast genome sequence of a cultivated pepper (C. chinense) has been reported here. The total length of the chloroplast genome is 156,936 bp, with 37.7% overall GC content. A pair of inverted repeats (IRs) of 25,847 bp was separated by a small single copy (SSC) region of 17,912 bp and a large single copy (LSC) region of 87,330 bp. The chloroplast genome harbors 113 known genes, including 79 protein-coding genes, four ribosomal RNA genes, and 30 transfer RNA (tRNA) genes. In all, 21 of these genes are duplicated in the inverted repeat regions, 15 genes and six tRNA genes contain a single intron, while two genes have two introns. Analysis revealed 117 simple sequence repeat (SSR) loci, which are mostly located in the intergenic regions. The complete chloroplast genome reported here enriches our knowledge of the genetic complement of C. chinense, and contributes to our understanding of the genetic relationships within the genus Capsicum.

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Production of spring wheat, the major crop in Mongolia, accounts for 98% of the cultivated area. Understanding genetic variability in existing gene bank accessions is critical for collection, conservation and use of wheat germplasms. To determine genetic diversity and population structure among a representative collection of Mongolian local wheat cultivars and lines, 200 wheat accessions were analyzed with 15 SSR markers distributed throughout the wheat genome. A total of 85 alleles were detected, with three to five alleles per locus and a mean genetic richness of 5.66. Average genetic diversity index was 0.69, with values ranging from 0.37–0.80. The 200 Mongolian wheat accessions were mainly divided into two subgroups based on structure and phylogenetic analyses, and some phenotypes were divergent by the subgroups. Results from this study will provide valuable information for conservation and sustainable use of Mongolian wheat genetic resources.

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DNA barcoding is the use of short DNA sequences of the genome for large scale species identification. The Consortium for the Barcode of Life (CBOL) plant-working group recommended a 2-locus combination as the standard plant barcode. The evolutions of the chloroplast regions combined with nuclear gens are sufficiently rapid to allow discrimination between closely related species. We evaluated the efficacy of the proposed plant barcoding loci, matK, along with ITS2 for barcoding the Vigna species. To assess the discriminatory ability of barcoding loci for identifying the Vigna species, we sampled 52 of the taxonomically best known groups in the genus. Topologies of the phylogenetic trees based on ITS2 and matK analyses were similar but a few accessions were placed into distant phylogenetic groups. Neither ITS2 nor matK analyses were able to discriminate some closely related Vigna species. Thus, we used concatenated data to increase the resolving power of ITS2 and used matK as an additional tool for phylogenetic analysis in Vigna because characterization of the nucleotide sequences of the matK region was easier and more cost-effective than that of the ITS region.

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• Genetic Diversity of Asian Vigna Species (Subgenus Ceratotropis; Genus Vigna) in India Based on ITS2 Sequences Data
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Chloroplast DNA sequences are a versatile tool for species identification and phylogenetic reconstruction of land plants. Different chloroplast loci have been utilized for phylogenetic classification of plant species. However, there is no report for a short DNA sequence that can distinguish all plant species from each other. Molecular markers derived from the complete chloroplast genome can provide effective tools for species identification and phylogenetic resolution. Thus, the complete chloroplast genome sequence of Korean landrace “Subicho” pepper (Capsicum annuum var. annuum) has been determined here. The total length of the chloroplast genome is 156,878 bp, with 37.7% overall GC content. A pair of IRs (inverted repeats) of 25,801 bp was separated by a small single copy (SSC) region of 17,929 bp and a large single copy (LSC) region of 87,347 bp. The chloroplast genome harbors 132 known genes, including 87 protein-coding genes, 8 ribosomal RNA genes, and 37 tRNA genes. A total of seven of these genes are duplicated in the inverted repeat regions, nine genes and six tRNA genes contain one intron, while two genes and a ycf have two introns. Analysis revealed 144 simple sequence repeat (SSR) loci and 96 variants, mostly located in the intergenic regions. The types and abundances of repeat units in Capsicum species were relatively conserved and these loci will be useful for developing C. annuum cp genome vectors.

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We investigated the species discriminatory efficiency of the proposed plant barcoding loci ITS2 and matK in Vicia species. In 2011, China Plant BOL Group proposed the addition of nuclear ITS2 to matK be accepted as a 2-locus DNA barcode to classify plant species. The matK region was chosen as a DNA barcode because of its effective species discriminating power, high quality sequence recovery, and easy experimental analysis. Integration of matK sequences into Vicia phylogeny could improve phylogenetic reconstruction of this species. To assess the ability of barcoding loci to resolve Vicia species, we sampled 36 of the taxonomically best known groups in the genus. Topologies of the phylogenetic trees based on ITS2 and matK analyses were similar but a few accessions were placed into distant phylogenetic groups. Neither ITS2 nor matK analyses alone could discriminate some closely related Vicia species. Thus, we have proposed a concatenated data approach to increase the resolving power of ITS2 and used matK as an additional tool for phylogenetic analysis in Vicia because characterization of the nucleotide sequences of the matK region was easier to recover and more cost-effective than those of the ITS region.

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Eggplant (Solanum melongena L.) is an excellent source of vitamins A and C and of flavonoid compounds, which are important antioxidant components believed to reduce the risk of various diseases. We investigated the antioxidant activity and flavonoid content in eggplant leaves and fruits to identify genetic resources with high antioxidant capacity for use in food or as feed additives, and also determined the influence of days to flowering, leaf blade colors, and latitudes of origin on the antioxidant activity and flavonoid content in eggplant leaves. The accessions originating from 45°N showed the highest flavonoid contents (AVG. = 15.4 μg mg⁻¹) followed by accessions from 30°~45°N (AVG. = 13.0 μg mg⁻¹), 15°~30°N (AVG. = 11.0 μg mg⁻¹), and 0°~15°N (AVG. = 9.5 μg mg⁻¹). The same pattern was also found in 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and 1,1-diphenyl-2-picryl-hydrazil (DPPH) antioxidant activities. High ABTS and DPPH activity and flavonoid content were found in the early-flowering accessions. All flavonoids of the greenish violet leaves were significantly higher than those of green leaves. The flavonoid concentration in eggplant leaves was 10 to 20 fold greater, at an average of 15.6 μg mg⁻¹, than that of the fruit (AVG. = 0.9 μg mg⁻¹). Taken together, eggplant leaves represent a potential source of natural antioxidants due to their high flavonoid content.

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• Valorization of Solanum melongena L. crop by-products: Phenolic composition and in vitro antioxidant, antidiabetic, anti-inflammatory, cytotoxic, and antimicrobial properties
  Mikel Añibarro-Ortega, Maria Inês Dias, Jovana Petrović, Sonia Núñez, Ricardo C. Calhelha, Eduardo M. Costa, M. Machado, Manuela Pintado, Marina Soković, Víctor López, Lillian Barros, José Pinela
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  Elizabeth Guzmán Hernández, Maria del Rosario González Valle, José Carmelo Benítez Flores, Maria Eugenia Garian Aguilar, Rubén San Miguel Chávez, Maria Dolores Hernández Martínez, Leonardo del Valle Mondragón, David Segura Cobos, Gil Alfonso Magos Guerrer
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• Metabolomic Analysis of Phytochemical Compounds from Agricultural Residues of Eggplant (Solanum melongena L.)
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  Flávia Aparecida de Carvalho Mariano-Nasser, Cristine Vanz Borges, Juliana Arruda Ramos, Maurício Dominguez Nasser, Giovanna Alencar Lundgren, Karina Aparecida Furlaneto, Tânia Regina Kovalski, Rogério Lopes Vieites
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Vicia amurensis is a perennial plant found in Northern China, Japan, and Korea that plays an important role in sustainable agricultural practices due to its ability to fix atmospheric nitrogen in a symbiotic association with rhizobia. 454 sequencing technology was used to sequence the V. amurensis transcriptome which yielded 26.41 Mb from 71,197 reads as a result of 24,959 valid singletons. In addition, 1743 contigs, with the largest contig size being 3534, and 26,702 unigenes were detected. The contig distributions in three non-mutually exclusive Gene Ontology classifications and clusters of orthologous gene classes showed that differentially expressed genes were generally overrepresented in general function and prediction alone (176, 14.47%), and posttranslational modifications, protein turnover, chaperones (162, 13.32%). In total, 12,656 single nucleotide polymorphism (SNP) types were detected; these variants contained 10,585 SNPs, 1513 indels and 558 variants involving more than one nucleotide. The 2383 SNP types with high confidence differences were identified. The present study provides invaluable information on the functional genomic resources and future biological research on V. amurensis. The SNPs identified in this study will provide a material basis for future mapping and marker-assisted breeding analyses.

The present study investigated the isolation and characterization of 34 polymorphic microsatellite markers developed from Actinidia arguta (Sieb. and Zucc.) Planch. ex Miq. var arguta. These markers produced 349 alleles in eight Actinidia species, with an average of 10.3 alleles per locus. Observed heterozygosity ranged from 0.50 to 0.87 (mean = 0.72), and polymorphism information content ranged from 0.37 to 0.88 (mean = 0.69). The phylogenetic relationship obtained using microsatellite markers showed minor clustering and population differences among species while 38 A. arguta accessions fell into two subgroups. These newly developed polymorphic microsatellite markers will be very useful in sustainable genetic conservation, marker-assisted breeding, and classification of the Actinidia genus.

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