In order to estimate genetic diversity of Korean rice landraces, rice characters and SSR markers of 76 rice germplasms were analyzed. Of 12 rice characters, amylose content (AC) showed as largest variance (4.9 to 28.9%), whereas grain length (GL) showed as the lowest variance (4.4 to 5.9 mm). In principal component analyses (PCA), the first principal component explained 60.3% of total variance, in which culm length (CL) and growth period (GP) showed as positive variance and AC showed as negative variance. The second principal component explained an additional 22.4% of the total variance, in which GP and AC showed highly positive variables and CL showed a negative variable. Forty nine SSR markers produced a total of 473 alleles with an average of 9.65 alleles. Polymorphism information content (PIC) was in the range of 0.11 to 0.93. Average observed heterozygosity ranged from 0.12 to 0.39, with an average value of 0.61. As a result of STRUCTURE analysis, 76 Korean rice landraces showed two subpopulations. In clustering analysis, rice characters and SSR markers were clustered into four groups and three groups, respectively. However, they were not significant different from each other. These results provided insight into the characteristics of Korean rice landraces, thus improving our knowledge on rice breeding.
Citations
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,
Citations
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 (
Citations
We investigated the species discriminatory efficiency of the proposed plant barcoding loci ITS2 and
Citations
Eggplant (
Citations
Rice (
Citations
Sesame (
Citations
Sunflower is one of the most widely cultivated oil crops. It produces seeds which have abundant health benefits. The
objective
of this research was to determine the effects of two growing years and five planting dates on agronomic traits and chemical compositions in sunflower accessions. In this study, genotype by year interaction was significant for days to flowering, weight of seeds per plant, oil, palmitic acid, stearic acid, oleic acid, linoleic acid, all tocopherol and phytosterol components. The major source of variation in most agronomic traits and chemical compositions in sunflower was attributed by variation among genotypes. Days to flowering, head length, and weight of seeds per plant decreased when planting date was delayed. Oil content, stearic acid, oleic acid, α-tocopherol, total tocopherol, β-sitosterol, and total sterol contents decreased but linoleic acid increased when planting date was delayed. From this study, valuable information will be provided for sunflower breeders and growers in developing and producing functional food resources and products.
Citations
Tomato was considered as one of the most widely cultivated vegetable crops in the world. Tomato plant has high antioxidant capacity which can be attributed to the high levels of carotenoids, phenols, vitamins C and E. However, most of tomato plants have been discarded as waste after fruit harvesting. In order to identify genetic resources with high antioxidant level for use in food or as feed additives, we investigated the ABTS, DPPH antioxidant activity and polyphenol content in tomato leaves and stems. A total of 112 tomato accessions were classified into three groups by latitude of their collected countries: 30°~60° North (50 accessions), 0°~30° North (40 accessions), and 0°~30° South (22 accessions). Stem and leaf extracts showed wide variation in ABTS antioxidant activity ranging from 1.6 ± 1.0 to 48.4 ± 6.1 μg Trolox mg−1 dw. The antioxidant activity of DPPH was in the range of 6.3 ± 0.2 to 40.0 ± 0.3 μg ASC mg−1 dw. Total polyphenol content ranged from 6.1 ± 0.2 to 38.9 ± 0.7 μg GAE mg−1 dw. ABTS, DPPH antioxidant activities and polyphenol content in accessions from 30°~60°N latitude were significantly higher (P<0.05) than those from 0°~30°N latitude. ABTS values showed a significant positive correlation (r = 0.700**) with DPPH activity. IT100506 (KOR) and 702959 (UKR) were recommended as potential sources of natural antioxidants due to their highest antioxidant activity among accessions. This study will provide valuable information for tomato breeders in developing and producing functional food or feed additives resources.
Citations
The present study investigated the isolation and characterization of 34 polymorphic microsatellite markers developed from
Citations