在1968年以前,种植材料的推荐是以无性系的生产潜力和在大规模种植中实现这种潜力的可靠程度为根据的。但这些材料往往由于副性状不良(如不抗风和易感病)而不能推广。马来西亚不同地区的条件对无性系性状的影响,没有受到重视。然而,试验和生产方面的资料表明,无性系在不同地区的产量差异很大,而这种差异是由于无性系本身缺点与当地环境因子的相互作用所产生的。如PB5/63、RRIM501、RRIM623和LCB1320,由于风害损失严重,在遭风地区就不能达到预期的产 Prior to 1968, planting material recommendations were based on the climatic potential of clones and the reliability of such potential in large-scale cultivation. However, these materials are often not promoted due to poor sub-traits, such as resistance to wind and susceptibility. The impact of conditions in different parts of Malaysia on clonal traits has not been given any attention. However, experimental and production data indicate that clones have very different yields in different regions due to the interaction between their own shortcomings of clones and local environmental factors. Such as PB5 / 63, RRIM501, RRIM623 and LCB1320, due to the serious loss of wind damage, the expected production can not be achieved in the affected area