摘要
经过多年观测、重复试验,选出了对柚木锈病侵染具有很强抵抗力的3070. 3072号柚木种源,其感病指数分别为标准种源的3.5％与9.9％,病情指数分别为2.0％与9.4％,且抗病性能相当稳定。综合适应性、生长、干形、分枝特性、开花结实等7个性状,其聚合指数分别为标准种源的143％～197.5％与131.4％～186.8％,为缅甸(对照)、泰国、越南、老挝等国诸种源平均值的1.5～2.25倍,是海南省当前的优良种源。
Two provenances of Teak (Tectona grandis L. f.), 3070 from Suugam, and 3072 from Masale of India, which have strong resistance to the Teak Rust (Oliva tectonae Thirum) have been selected after several years' observations and repeated tests. The disease condition indexes of 3070 and 3072 are 2.0% and 9.4% respectively,and the indexes of disease infection are 3.5 % and 9.9 % of that of the standard provenance respectively. Furthermore, their rust-resistance is quite stable. Summing up the evaluation for 7 characters namely disease-resistance,drought-resistance,volume growth, persistence of axis, degree of straight-bole, branching type and branch size, the aggregate index values of the two provenances increased respectively by 43%~97.5% and 31.4%~86.8% as compared to that of the standard provenance, and were 1.5 and 2.25 times as much as the mean aggregate index values of the provenances from Myanmar, Thailand, Laos and Vietnam. The two provenances are considered to be the superior ones in Hainan Island.
出处
《林业科学研究》
CSCD
北大核心
1992年第3期290-297,共8页
Forest Research
关键词
柚木
锈病
种源
病情指数
育种
Teak Rust (Oliva tectonae Thirum) provenance disease condition index
