Detection and characterization of caffeine-less tea plants originated from interspecific hybridization
2009
Ogino, A.(National Inst. of Vegetable and Tea Science, Makurazaki, Kagoshima (Japan)) | Tanaka, J. | Taniguchi, F. | Yamamoto, M.P. | Yamada, K.
Two tea plants containing little caffeine (caffeine-less) were found in a population derived from natural crossings of an interspecific hybrid 'Cha Chuukanbohon Nou 6' (Camellia taliensis x C. sinensis). Two caffeine-less plants showed low caffeine content and rather high theobromine, which is a precursor of caffeine, whereas all tested tea (C. sinensis) cultivars including 'Cha Chuukanbohon Nou 6' were observed high caffeine/low theobromine contents. Component analysis by HPLC showed that 'Taliensis-akame' (C. taliensis), which is the seed parent of 'Cha Chuukanbohon Nou 6', showed low caffeine content and rather high theobromine and may be a caffeine-less character donor. Pedigree analysis using SSR markers suggested that parent-offspring relationship was found between tea plants related to caffeine-less tea breeding lines. Therefore, it is considered that caffeine-less character of caffeine-less plants could be inherited recessively from 'Taliensis-akame' via 'Cha Chuukanbohon Nou 6'. Preliminary genetic analysis using 33 progenies of 'Cha Chuukanbohon Nou 6' suggested the possibility that the caffeine-less character might be controlled by one recessive locus. Caffeine-less tea plants found in this study, will be efficiently used for genetic resources to introgress caffeine-less traits to tea cultivars in breeding programs.
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