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本文主要讨论用人工有性杂交的方法,通过选配合适的父本,GT_1的某些缺陷性状进行改良的可能性及初步结果.橡胶树无性系GT_1选育至今已有62年了.初生代无性系GT_1,由于综合性状好,适应性广,目前已被各主要植胶国广泛栽培.然而,随着种植国家的增多和地区的扩大,亦暴露了某些缺陷性状.尤其.在有寒地区,GT_1的树冠易受寒害,亟需改良.就目前所取得的改良效果而言,行之有效的办法有二:一是取其树干,接上其它抗寒品系的树冠组成“冠接树”.二是以GT_1为母本,选配合适的父本进行人工杂交,繁衍优良有性系并从中选择优良个体建立优良无性系.试验的初步结果表明:用有性杂交方法,不但可获得某些性状超亲的优良个体,尚可获得性状改良的有性群体.试验亦初步证明:RRIM600、停亮62～5和五星I_3;等无性系是改良GT_1某些缺陷性状的好父本.
In this paper, we discuss the possibility and preliminary results of improving some of the trait traits in GT_1 by using the method of artificial sexual crosses, and the breeding has been 62 years since the clonal GT_1 was cloned Department of GT_1, due to good overall traits, wide adaptability, has been widely cultivated by the major planting countries, however, with the growing number of planting countries and the expansion of the region, but also exposed some of the defect traits, especially in the cold area , Crown of GT_1 is susceptible to chilling injury and needs to be improved urgently.There are two effective ways to improve the effect currently obtained: First, take its trunk and connect it with the crown of other cold-resistant strains, The second is to use GT_1 as the male parent, mating with the appropriate male parent to make artificial crosses, multiply the excellent sexual lines and select good individuals to establish excellent clones.The preliminary results show that: with sexual hybridization method, not only can obtain some Some individuals with super-progeny traits could still obtain sexual groups with improved traits.The experiments also showed that clones RRIM600, Halo 62-5 and Ipomoea I_3 were good parents for some of the trait defects in GT_1.