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1876年斯里兰卡从巴西引进大约1919株橡胶实生苗.是为斯里兰卡橡胶园的基础。自从引进这批橡胶树以来,单位面积产量大约增加了4倍。增产的主要原因是使用了改良的种植材料。在1935—1945年的初期发展阶段,斯里兰卡橡胶育种方案的唯一目标是增加产量。在此期间培育出了RRIC45和36。
Sri Lanka imported about 1919 rubber seedlings from Brazil in 1876. It is the basis for the rubber plantation in Sri Lanka. Since the introduction of these rubber trees, production per unit area has increased by about 4 times. The main reason for the increase is the use of improved planting materials. In the early stages of development from 1935 to 1945, the only goal of the rubber breeding program in Sri Lanka was to increase production. RRICs 45 and 36 were developed during this period.