Analysis of Selected Biochemical Constituents in Black Tea (<i>Camellia sinensis<i>) for Predicting the Quality of Tea Germplasm in Sri Lanka
<p>Twenty two accessions from tea (<em>Camellia sinensis</em>) germplasm representing high, moderate and low quality of made tea were used for black tea production in wet and dry seasons. Total polyphenol content, total free amino acid content, total liquor colour and brightness we...
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Postgraduate Institute of Agriculture, University of Peradeniya
2012-09-01
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| Series: | Tropical Agricultural Research |
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| Online Access: | https://tar.sljol.info/articles/4629 |
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| author | JD Kottawa-Arachchi MTK Gunasekare MAB Ranatunga L Jayasinghe RP Karunagoda |
| author_facet | JD Kottawa-Arachchi MTK Gunasekare MAB Ranatunga L Jayasinghe RP Karunagoda |
| author_sort | JD Kottawa-Arachchi |
| collection | DOAJ |
| description | <p>Twenty two accessions from tea (<em>Camellia sinensis</em>) germplasm representing high, moderate and low quality of made tea were used for black tea production in wet and dry seasons. Total polyphenol content, total free amino acid content, total liquor colour and brightness were analysed by spectrophotometric methods and correlated with organoleptic parameters viz infused leaf colour, colour of liquor, strength and quality. Strong positive correlations were identified between infused leaf colour and total liquor colour with total quality score. It was also found that the polyphenol content had a positive correlation with brightness which was responsible for liquor quality. The resultant dendrogram of cluster analysis enabled separation of these accessions into high, moderate and low quality categories. Principal Component analysis (PCA) revealed that, of the 16 parameters studied, infused leaf colour has the highest contribution towards clustering of accessions. Group III represented 5 well established high quality accessions (DT1, DUN7, NAY3, TRI 777 and PK2) and group I represented moderate quality accessions including two accessions (N2 and TRI 4079) which were previously categorized in the high quality group. Therefore, polyphenol content, total liquor colour, brightness and infused leaf colour could be used as reliable quality parameters, whereas total amino acid and crude fibre contents cannot be considered as useful quality parameters. Furthermore, fermentation rate was determined for the 22 accessions and four groups were identified based on the fermentation rate. Results revealed that the fermentation rate could be used as an early selection criterion for determination of fermentation properties of tea accessions at progeny level.</p><p><em>Tropical Agricultural Research Vol. 23 (1): 30-41 (2011)</em></p>DOI: <a href="http://dx.doi.org/10.4038/tar.v23i1.4629">http://dx.doi.org/10.4038/tar.v23i1.4629</a> |
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| language | English |
| last_indexed | 2024-12-11T20:58:40Z |
| publishDate | 2012-09-01 |
| publisher | Postgraduate Institute of Agriculture, University of Peradeniya |
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| series | Tropical Agricultural Research |
| spelling | doaj.art-a03bcb08cb3e4804ab4128a7c977e9242022-12-22T00:51:03ZengPostgraduate Institute of Agriculture, University of PeradeniyaTropical Agricultural Research1016-14222012-09-01231304110.4038/tar.v23i1.46293762Analysis of Selected Biochemical Constituents in Black Tea (<i>Camellia sinensis<i>) for Predicting the Quality of Tea Germplasm in Sri LankaJD Kottawa-Arachchi0MTK Gunasekare1MAB Ranatunga2L Jayasinghe3RP Karunagoda4Tea Research Institute, TalawakelleTea Research Institute, TalawakelleTea Research Institute, TalawakelleTea Research Institute, TalawakelleDepartment of Agricultural Biology, Faculty of Agriculture, University of Peradeniya, Peradeniya,<p>Twenty two accessions from tea (<em>Camellia sinensis</em>) germplasm representing high, moderate and low quality of made tea were used for black tea production in wet and dry seasons. Total polyphenol content, total free amino acid content, total liquor colour and brightness were analysed by spectrophotometric methods and correlated with organoleptic parameters viz infused leaf colour, colour of liquor, strength and quality. Strong positive correlations were identified between infused leaf colour and total liquor colour with total quality score. It was also found that the polyphenol content had a positive correlation with brightness which was responsible for liquor quality. The resultant dendrogram of cluster analysis enabled separation of these accessions into high, moderate and low quality categories. Principal Component analysis (PCA) revealed that, of the 16 parameters studied, infused leaf colour has the highest contribution towards clustering of accessions. Group III represented 5 well established high quality accessions (DT1, DUN7, NAY3, TRI 777 and PK2) and group I represented moderate quality accessions including two accessions (N2 and TRI 4079) which were previously categorized in the high quality group. Therefore, polyphenol content, total liquor colour, brightness and infused leaf colour could be used as reliable quality parameters, whereas total amino acid and crude fibre contents cannot be considered as useful quality parameters. Furthermore, fermentation rate was determined for the 22 accessions and four groups were identified based on the fermentation rate. Results revealed that the fermentation rate could be used as an early selection criterion for determination of fermentation properties of tea accessions at progeny level.</p><p><em>Tropical Agricultural Research Vol. 23 (1): 30-41 (2011)</em></p>DOI: <a href="http://dx.doi.org/10.4038/tar.v23i1.4629">http://dx.doi.org/10.4038/tar.v23i1.4629</a>https://tar.sljol.info/articles/4629brightnesspolyphenolstasters’ scorestea qualitytotal colour |
| spellingShingle | JD Kottawa-Arachchi MTK Gunasekare MAB Ranatunga L Jayasinghe RP Karunagoda Analysis of Selected Biochemical Constituents in Black Tea (<i>Camellia sinensis<i>) for Predicting the Quality of Tea Germplasm in Sri Lanka Tropical Agricultural Research brightness polyphenols tasters’ scores tea quality total colour |
| title | Analysis of Selected Biochemical Constituents in Black Tea (<i>Camellia sinensis<i>) for Predicting the Quality of Tea Germplasm in Sri Lanka |
| title_full | Analysis of Selected Biochemical Constituents in Black Tea (<i>Camellia sinensis<i>) for Predicting the Quality of Tea Germplasm in Sri Lanka |
| title_fullStr | Analysis of Selected Biochemical Constituents in Black Tea (<i>Camellia sinensis<i>) for Predicting the Quality of Tea Germplasm in Sri Lanka |
| title_full_unstemmed | Analysis of Selected Biochemical Constituents in Black Tea (<i>Camellia sinensis<i>) for Predicting the Quality of Tea Germplasm in Sri Lanka |
| title_short | Analysis of Selected Biochemical Constituents in Black Tea (<i>Camellia sinensis<i>) for Predicting the Quality of Tea Germplasm in Sri Lanka |
| title_sort | analysis of selected biochemical constituents in black tea i camellia sinensis i for predicting the quality of tea germplasm in sri lanka |
| topic | brightness polyphenols tasters’ scores tea quality total colour |
| url | https://tar.sljol.info/articles/4629 |
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