The karyotype formula of Dayelongcha is 2n=2x=30=18m+10sm(2SAT)+2st(2SAT). The zymograms of EST isozyme can show the characteristic of reginalism in tea vareties.

• 大叶龙的核型公式为 2n =2x =3 0 =1 8m +1 0sm(2SAT) +2st(2SAT) ,酯酶同工酶酶谱能反映茶叶品种的区域性特征。