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马来西亚对巴西橡胶的常规育种是1928年开始的,以无性系为人工杂交的亲本每年杂交,再从一定时期内的杂交后代中选出优良单株建立新的无性系,如此反复,现已进入第六个周期。总的趋势是杂交亲本越用越多,所选新无性系增产的幅度越来越小,感到在现有种质资源基础上进行常规育种,如不解决盲目选用杂交亲本、单凭产量进行选择及周期过长这三个问题,是难以取得较大进展的。
Malaysian conventional breeding of Brazilian rubber began in 1928, the clones of artificial crosses each year hybridization, and then from a certain period of hybrid progenies in the selection of good plants to establish new clones, so repeatedly, has now entered The sixth cycle. The general trend is that the more the parents of the hybrids are used, the smaller the yield of new clones selected is, and the conventional breeding is felt on the basis of the existing germplasm resources. If blind selection of the hybrid parents is not solved, selection based on the yield alone And the long period of these three issues, it is difficult to make significant progress.