heterozygosities and genetic relationship of tea cultivars revealed by simple sequence repeat markers and implications for breeding and genetic mapping programs.genetic maps are essential tools for quantitative trait locus analysis and marker-assisted selection breeding. in order to select parents that are highly heterozygous for genetic mapping, the heterozygosity (hs) of 24 tea cultivars (camellia sinensis) was analyzed with 72 simple sequence repeat markers. in total, 359 alleles were obtained with an average of 4.99 per marker. the hs varied greatly from 37.5 to 71.0% with an average of 51.3%. on average, tea cultivars from fujian province showed a ...201525867299
analysis of trace metals and perfluorinated compounds in 43 representative tea products from south china.six trace metals (cd, pb, cr, cu, zn, and mn) and 2 perfluorinated compounds (pfcs), perfluorooctane sulfonate (pfos) and perfluorooctanoic acid (pfoa), were analyzed in 43 representative tea products (including 18 green, 12 oolong, and 13 black teas) from 7 main tea production provinces in china, using the atomic absorption spectrophotometer for trace metals analysis and hplc-ms/ms for pfos and pfoa analysis. the average contents of the 3 essential metals mn, cu, and zn ions in the tea samples ...201424806350
oxalate content of green tea of different origin, quality, preparation and time of harvest.the purpose of the study was to analyse the oxalate content of green tea (camellia sinensis) depending on origin, quality, time of harvest and preparation. fifty-two green tea samples were received from different regions of china. the oxalate content of each tea infusion was measured using a validated hplc-enzyme-reactor method. the soluble oxalate content of green tea ranged from 8.3 to 139.8 mg/l. in samples from known provenances, the highest oxalate concentration was found in green tea from ...201020204342
lead contamination in tea leaves and non-edaphic factors affecting it.recent tests have detected high lead (pb) concentrations in some commercial brands of tea leaves and this finding has raised concerns due to the possible health-related problems associated with pb poisoning. in present research, we investigated the pb contamination in tea leaves produced in zhejiang province in china. pb concentrations in all tea leaves sampled were below 5 mg/kg, the permissible levels given by chinese ministry of agriculture, indicating that pb contamination in this province i ...200516219507
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