马来西亚橡胶研究院迄今已完成了RRIM500组、RRIM600及RRIM700组无性系(第一批选出)的鉴定。目前,RRIM700组其余部分的田间试验及新的RRIM800组无性系试验正在进行中。从人工授粉开始,这些新无性系的培育、鉴定和推广,通常估计约需25—30年。选育年限如此之长,实难令人满意。因此,在最近的试验中,采用和检验了一 The Malaysian Institute of Rubber has so far completed the identification of the clones (first batch) of the RRIM500, RRIM600 and RRIM700 groups. Currently, the rest of the RRIM700 field trial and the new RRIM800 clonal experiment are underway. Starting from artificial pollination, the cultivation, identification and promotion of these new clones are usually estimated to take about 25-30 years. The length of breeding is so long that it is hard to be satisfied. Therefore, in recent experiments, one was adopted and tested