【摘要】 对21个橡胶树无性系幼树期和初产期试验林的抗风性分别进行测定,并采用最小平方欧氏距离法,对2个生长时期的4项风害相关指标进行聚类分析。结果表明,不同的无性系间断倒率、风害指数存在极显著差异,但区组间差异不显著。通过聚类分析将供试无性系划分为4个类群,以热试14、PR107、热试3、热试11对台风的抗性最强,热试18和热试20的抗风性最差,其它无性系抗风性为中等。筛选出的3个抗风性新品系可作为橡胶树抗风高产育种与改良及相关遗传研究的试验材料加以应用。更多还原

【Abstract】 Twenty-one clones of Hevea brasiliensis at sapling stage and early stages of tapping plantation were tested for their resistance to typhoon.Cluster analysis based on 4 indexes correlative with wind damage of 18 cultivar resources at above 2 growth stages was made by Statistical Product and Service Solutions soft ware according to minimum squared Euclidean distance(MSED).The results showed that the snapping and uprooting and index of the wind damage between clones had highly significant differences,but differences between blocks were not significant.The 18 clones could be clustered into 4 groups based on their resistances to typhoon,among which CATAS14,PR107,TSF3 and TSF11 were the strongest,but TSF18 and TSF20 were the weakest,while the other 12 cultivars had medium resistance to wind damage.Based on the above results,3 new lines with good resistance to wind damage would be used as available trial materials of wind-resistance and high-yielding breeding and improvement,and correlative genetic research in H.brasiliensis.更多还原