Gulati, Ashu and R, Rajkumar and Karthigeyan, S and Sud , R K and Vijayan, D and Thomas, J and Rajkumar, R and Das, R C and Tamuly, P and Hazarika, M and Ahuja, Paramvir Singh (2009) Catechin and Catechin Fractions as Biochemical Markers to Study the Diversity of Indian Tea (Camellia sinensis (L.) O. KUNTZE) Germplasm. Chemistry and Biodiversity, 6 (7). pp. 1042-1052. ISSN 1612-1872

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The heterogeneous Indian tea germplasm includes 'China', 'Assam', 'Cambod', and their hybrids which were evaluated using biochemical markers viz., total catechin and their fractions, for varietal identification and characterization. Principal component analysis (PCA) of biochemical characters showed that the total catechin and trihydroxylated catechin has higher eigenvalues. The first two principal components (PCs) could differentiate more than 90% of the clones studied. This grouping based on first two principal component matrices differentiated 'China', and their hybrids with 'Assam' and 'Cambod' variety. Morphologically indistinct large-leaved 'Cambod' variety and 'Assam' varieties could not be differentiated using biochemical markers, since both varietal types taxonomically belong to a single species. Clones of 'China' type showed low total catechin content and catechin ratio which are distinctly grouped. The 'China-Assam' and 'China-Cambod' hybrids formed intermediate groups between 'China' PC group and 'Cambod'/'Assam' PC groups, providing evidence for genetic control of catechin ratio variation. Tea clones which are differentially positioned in the PC group could be explained based on the genetic contribution by other varietal type as parents. This biochemical characterization will be a useful tool in the development of quality-tea clones with different proportion of total catechin and their fractions.

Item Type: Article
Uncontrolled Keywords: Genetic Diversity; Caffeine
Subjects: Plant Biotechnology
Depositing User: Dr. Aparna Maitra Pati
Date Deposited: 28 Dec 2011 09:58
Last Modified: 13 Feb 2012 05:45

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