VARIATION IN CATECHIN COMPOSITION OF POPULARLY CULTIVATED TEA CLONES IN EAST AFRICA (KENYA)

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dc.contributor.author Cherotich, L.
dc.contributor.author et al.
dc.date.accessioned 2017-08-02T06:21:11Z
dc.date.available 2017-08-02T06:21:11Z
dc.date.issued 2017-08-02
dc.identifier.isbn 9966-923-28-4
dc.identifier.uri http://journals.jkuat.ac.ke/index.php/jscp/article/view/1037
dc.identifier.uri http://hdl.handle.net/123456789/3405
dc.description.abstract Tea polyphenols and catechins have gained prominence in determination of tea quality. Tea leaves contain large amounts of catechins and their derivatives and these have shown positive effects on human health. An experiment was carried out to determine the level of catechins and polyphenols in 20 new clones found in two distinct tea growing areas. The trial comprising twenty clones was established in two distinct sites in Kenya using randomized complete block design with three replicates and consisted of 10 popular cultivars widely cultivated in the Lake Victoria Basin and additional 10 newly improved clones. Tea leaf samples were collected across two seasons; dry and wet seasons. Tea quality parameters entailing catechins, caffeine and total polyphenols were generated for the 20 clones across the two seasons and sites. The ISO 14502-1 and ISO 14502-1:2005 procedures were used for polyphenol and catechin analyses, respectively. The ANOVA results generated indicated that the level of catechins and polyphenols in tea clones were significantly different (p<0.05) and varietal dependent. Generally, the Assam varieties had higher levels of catechins and polyphenols than the Chinary and Cambod varieties, indicating why they are popularly cultivated in the East African region and whose tea quality is highly regarded. Furthermore, the results from principle component analysis (PCA) grouped the clones into three major clusters with one comprising of high quality assam varieties, a mixture of moderate quality Assam, Cambod and Chinary varieties and low catechin content Assam anthocyanin-rich variety. It is concluded that the level of catechins in tea plants are varietal dependent, although environmental stress has effects on the synthesis of flavanoids. The results demonstrated that the differences in the accumulation of catechins among the tea clones could be important for the discrimination of clonal diversity. en_US
dc.description.sponsorship JKUAT en_US
dc.language.iso en en_US
dc.publisher JKUAT en_US
dc.relation.ispartofseries Proceedings of the 2013 JKUAT Scientific Technological and Industrialization Conference;14th -15th November 2013
dc.subject Tea en_US
dc.subject Health en_US
dc.subject Camellia sinensis en_US
dc.subject catechins en_US
dc.subject PCA en_US
dc.subject Kenya en_US
dc.subject chinary en_US
dc.subject assam en_US
dc.subject cambod en_US
dc.subject Kenya en_US
dc.subject JKUAT en_US
dc.title VARIATION IN CATECHIN COMPOSITION OF POPULARLY CULTIVATED TEA CLONES IN EAST AFRICA (KENYA) en_US
dc.type Article en_US


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