茶树新梢叶片叶绿素含量与黑刺粉虱选择性的关系

为了明确不同茶树品种（种质）新梢叶绿素含量与黑刺粉虱选择性的关系，为抗虫品种选育的早期鉴定提供依据，采用丙酮分光光度法测定了9份不同抗性茶树新梢叶片的叶绿素含量，分析了茶树新梢叶绿素含量与黑刺粉虱选择性的相关性。研究表明，9份茶树种质新梢叶片的叶绿素总量差异达到显著水平(F=4.323，P＜0.05)。其中，‘丹桂’、‘优3’、‘铁观音’、‘优510’、‘玉龙’和‘毛蟹’等种质的新梢叶片叶绿素总量较高，分别为3.72、3.49、2.85、2.74、2.69和2.61 mg/g；而‘黄旦’、‘福云10号’和‘福云6号’等品种的叶绿素总量较低，分别为1.83、1.84和1.85 mg/g。茶树种质新梢叶绿素总量、叶绿素a含量和叶绿素b含量与黑刺粉虱单位叶面积产卵量有一定负相关，但相关不显著(P＞0.05)；而与黑刺粉虱世代存活率有显著或接近显著水平的负相关(P＜0.05)。表明新梢叶绿素总量、叶绿素a含量和叶绿素b含量较高的茶树种质，对黑刺粉虱的抗虫性较强；反之，则抗虫性较弱。

Correlation Between Contents of Chlorophyll in New Shoots from Tea Germplasms and Selectivity of Aleurocanthus spiniferus

The objective of this study is to understand the correlation between the chlorophyll contents in new shoots from different tea germplasms and the selectivity of Aleurocanthus spiniferus, and provide theoretical basis for early identification of resistant breeding. In this experiment, the acetone spectrophotometric method was employed to detect the chlorophyll contents in new shoots from 9 tea germplasms, and the correlation between the chlorophyll contents in new shoots from different tea germplasms and the selectivity of A. spiniferus was analyzed. The results showed that there was significant difference on contents of chlorophyll in new shoots from 9 tea Germplasms(F=4.323，P＜0.05). The chlorophyll contents from ‘Dangui’ (3.72 mg/g), ‘U3’ (3.49 mg/g), ‘Tieguanyin’ (2.85 mg/g), ‘U510’ (2.74mg/g),’Yulong’ (2.69 mg/g) and ‘Maoxie’ (2.61 mg/g) were much higher than that of ‘Huangdan’ (1.83 mg/g), ‘Fuyun No.10’ (1.84 mg/g), ‘Fuyun No.6’ (1.85 mg/g). The contents of chlorophyll or chlorophyll-a or chlorophyll-b in new shoots from 9 tea germplasms had no significant negative correlation to the oviposition number of A. spiniferus in unit area (P＞0.05), but had significant or nearly significant negative correlation to the generational survival rate of A. spiniferus (P＜0.05). In short, the result suggested that higher contents of chlorophyll or chlorophyll-a or chlorophyll-b had relatively higher resistance to A. spiniferus.