%0 Journal Article %A FANG Kaixing %A JIANG Xiaohui %A QIN Dandan %A LI Hongjian %A HUANG Hualin %A PAN Chendong %A LI Bo %A WU Hualing %T Selection of Tea Germplasm With High Contents of Amino Acid and Theanine %D 2019 %R 10.11869/j.issn.100-8551.2019.09.1724 %J Journal of Nuclear Agricultural Sciences %P 1724-1733 %V 33 %N 9 %X In order to screen tea germplasms with high contents of amino acid and theanine and explore the relationship between the contents of amino acid and theanine, in present research, we detected the amino acid contents of steamed one bud and two leaves from spring shoots of 218 tea germplasms by nihydrin colorimetry combining with microplate assay, and the theanine contents by HPLC. The results showed that, the contents of amino acid ranged 1.50%~8.98%, among which 55 samples had high amino acid contents (≥5%); the contents of theanine varied from 0 to 4.03%, among which 13 samples had high level (≥3%) of theanine and four samples had no theanine; the ratio of theanine content to total amino acid content distributed was 0 to 0.78, mainly ranging from 0.2 to 0.5. In addition, the correlation coefficient between them reached to 0.752, indicating a significant positive correlation. In summary, a batch of specific tea germplasms with extreme amino acid contents had been screened in this study, which provides the foundation for selecting new tea plant varieties with high amino acid and high theanine contents and studying the molecular mechanism of accumulating amino acid. %U https://www.hnxb.org.cn/EN/10.11869/j.issn.100-8551.2019.09.1724