关键词: 茶树种质资源, 茶云纹叶枯病, 抗病性

Abstract:

The resistance of tea germplasm resources to tea brown blight was evaluated by field investiga-tion, nursery inoculation and detached shoot inoculation. The results showed that the disease index of inocu-lated detached shoots was significantly correlated to that of shoots inoculated in the nursery and that natural-ly occurring in the of field (r = 0. 6993**, r = 0. 4036*, P< 0. 01 and P< 0. 05 respectively). The conid-iospores of Colletotrichum camelliae Massee were isolated from inoculated, diseased leaves. Detached shootinoculation is recommended as the prefersed method for resistance evaluation. A resistance grading system isoutlined. One highly resistant, 12 resistant and 13 medium-resistant germplasms were screened out. Large-leaf germplasms were found to have weaker resistance than medium-and small-leaf germplasms.

Key words: Tea germplasm resources, Guignardia camellian, Resistance