Six superior individual trees were selected hom JiuKeng cultivar by the means of natal and artificial selections.Each of the superior plant was identified,including sensory quality,mainly chemical components,biological charactetistics,adverse resistance and so on.The identification results show that it belonged to early germination.Its green tea had durable fragrance aroma and excellent quality.The content of amino acid and tea polyphenol respectively was 2.8 % and 28.38 %.It was characterized by strong resistance and germination of high density.J4' s comprehensive perfonmanoe is good,which has lots of potential.