Evaluation of the Major Characteristics of IRRDB 1981 Rubber Tree Germplasm Planted in 1987
The girth, latex yield, laticifer number and wind tolerance of 1981 IRRDB rubber tree germplasm planted in 1987 were observed. The results showed much obvious difference between accessions of the germplasm. Genotype 62 of the accessions was found to have larger girth, higher latex yield and windfirmness, and could be utilized as breeding material in the breeding program to widen the genetic base of the existing clones. The SAS correlation analysis of the girth, latex yield and laticifer number of 81 genotypes indicated that the girth had a significant correlation with latex yield (r=0.263*) and that both laticifer rings and laticifer number showed a highly significant correlation with latex yield (r=0.631**, r=0.422**).