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本试验用巴西橡胶与矮生小叶橡胶进行杂交,并对杂交后代的几个性状进行了测定。按照产量、树皮厚度、树围和乳管列数,选出第38、51、55、50、52、33和05号植株。初步测定表明,第33、50和51号植株产量较高,而且南美叶疫病发病级别较低。估计矮生小叶橡胶×FX4098有性系的杂种后代具有优良性状。本试验中还观察到叶片厚度和乳管密度有显著相关。
In this experiment, we crossed the rubber of Brazil with the dwarf leaflet rubber, and tested several traits of hybrid progeny. Plants 38, 51, 55, 50, 52, 33 and 05 were selected based on yield, bark thickness, shrub and milk tube numbers. Preliminary tests showed that plants Nos. 33, 50 and 51 had higher yields and a lower incidence of leaf blight in South America. It is estimated that hybrid progenies of the dwarf leaflet rubber × FX4098 sexual line have excellent traits. In this experiment, it was also observed that there was a significant correlation between leaf thickness and density.