8个‘丹桂’杂交新品系初步鉴定

Comparison on F1 Progenies of Dangui(Camellia sinensis)

以黄棱为对照,对8个从丹桂自然杂交后代选育的新品系的特征特性、鲜叶产量、制茶品质、光合特性、生化成分等进行鉴定.结果表明：各品系均为灌木型,树姿半开张,叶形椭圆或长椭圆,叶片大小为中叶或小叶,叶片稍上斜着生,芽叶黄绿色,茸毛少;DG-1、DG-3、DG-5、DG-7、DG-8等品系3年平均鲜叶产量均比对照高;乌龙茶感官品质3年平均总分DG-1、DG-2、DG-5和DG-8等较高,总体表现为花香较显、味较醇爽;净光合速率为10.68～14.22 μmol·m-2·s^-1,DG-6最高,DG-2最低;蒸腾速率为2.58～4.65 mol·m^-2·sl,DG-1最高,DG-4最低;氨基酸含量为3.58％～6.41％,DG-1、DG-3、DG-5等品系较高;EGCG含量为83.95～113.4mg·g^-1,DG-4、DG-7较高;儿茶素总量为156.20～208.46 mg·g^-1,DG-4、DG-6、DG-8等品系较高.经综合鉴定,DG-1、DG-5和DG-8三个新品系的表现较好.

Eight newly developed germplasms of Dangui（ Camellia sinensis ） were compared to Huangdan（ Camellia sinensis ） （CK） on their botanical characteristics, tea quality, photosynthetic properties and biochemical compositions. The results showed that the new varieties were semi-opened shrubs with elliptical or long elliptic leaves. All of the germplasms had middle- to small-size leaves, and few hairs on their olivine bud leaves. The fresh leaf yields of DG-1, DG-3, DG-5, DG-7 and DG-8 were higher than CK. The oolong tea made from the leaves of DG-1, DG-2, DG-5 and DG-8 were judged by the sensory panels to be superior to that from CK. The net photosynthesis rates of the teas were 11.22～ 14.22 μmol·m^-2·s^-1, with DG-6 being the highest and DG-2 the lowest among them. Their transpiration rates were 2.58-4.65 mol·m^-2·s^-1, with DG-1 being the highest and DG-4 the lowest among the cultivars. The contents of amino acids in the tea leaves were between 3.58% and 6.41%, as DG-1, DG-3 and DG-5 contained more than the others. Their EGCG contents were 87.5-113.4 mg g^-1, higher in DG-4 and DG-7. Whereas, the total catechins were 156.20～208.46 mg g^-1 for all, with DG-4, DG-6 and DG-8 higher than the others. The comprehensive quality of DG-1, DG-5 and DG-8 were higherthan the others.