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橡胶无性系IAN873于1979年从华南热作研究院引入粤西地区,1980～1990年相继进行了前哨点抗寒苗圃系比、大田高级系比、生产性系比及多点试种等试验。调查收集4个寒冬(1982/1983,1983/1984,198d/1985,1988/1989年)的抗寒性材料。取得早期引种10株树4割年,1个树位1割年的产量材料,以及100亩的生长、抗性及副性状资料。橡胶分子量达161万,浓乳机稳520秒。IAN873在粤西地区的轻风轻寒区,轻风中寒区(北坡除外)表现适应性良好。在1990年全国橡胶良种汇评中被评为中等规模推广级。
The rubber clonal IAN873 was introduced into the western part of Guangdong Province from the South China Research Institute of Hot Work in 1979. From 1980 to 1990, the tests were carried out in the areas of the outbreak cold-resistant nursery, advanced field ratio, productive ratio and multi-point test. Cold winter (1982/1983, 1983/1984, 198d / 1985, 1988/1989) cold-resistant materials were collected. Obtained the early introduction of 10 trees 4 cut years, 1 tree bit crop year yield material, and 100 acres of growth, resistance and secondary traits information. Rubber molecular weight of 1.61 million, strong milk machine stable 520 seconds. IAN873 shows a good adaptability to light and cold regions in the western Guangdong, with cold and light winters (except the northern slope). In 1990 the national race of rubber varieties in the assessment was rated as medium-sized promotion level.