| dc.description.abstract | SYAFRIZAL. The Effect of Propagation Methods and Clones on the Juvenility of
Rubber (Hevea brasiliensis Muell. Arg.) in the Budwood Garden. Supervised
LISA MAWARNI as Chairperson of the Advisory Committee and NINI
RAHMAWATI as Member of the Advisory Committee.
Juvenility is the early vegetative phase crucial to the rubber nursery system
as it determines growth rate, uniformity, and potential for budwood production.
This study aimed to determine the effect of propagation methods and clones on
the juvenility level of rubber plants (Hevea brasiliensis Muell. Arg.) in budwood
gardens. The research was conducted at the budwood garden of PT Socfin
Indonesia, Tanah Besih Estate, Serdang Bedagai, using a factorial Randomized
Complete Block Design (RCBD) consisting of two factors: propagation method
(mature budding and in vitro culture) and five rubber clones (IRCA 19, PB 235,
PB 217, IRCA 317, and IRCA 41), with 10 replications. Observed parameters
included shoot emergence rate, shoot angle, number of shoots, shoot diameter,
shoot length, number of leaves, leaf thickness, internode length, leaf area,
stomatal density, and total chlorophyll content. Results showed that clone type
had a significant effect on most juvenility indicators, while the propagation
method had a non significant effect. The interaction between propagation method
and clone significantly affected shoot emergence rate, shoot number, shoot angle,
shoot length, and shoot diameter. Clones IRCA 317 and IRCA 19 demonstrated
higher juvenility levels, indicated by faster shoot development, greater leaf
numbers, and longer shoots. In vitro propagation tended to promote better
vegetative growth than mature budding in certain clones. This study recommends
the use of IRCA 317 clone propagated through in vitro culture as a superior
budwood material for rubber nursery programs.
Keywords: Hevea brasiliensis, juvenility, propagation method, clone, budwood | en_US |
