PEMULIAAN PINUS BOCOR GETAH: KORELASI GENETIK PRODUKSI GETAH PADA TIGA SUB GALUR UJI KETURUNAN PINUS MERKUSII DI KPH BANYUMAS BARAT

Abstract

This study aims to determine the genetic correlation of resin yield to growth (height, diameter and branch-free height) in three sub-lines of the progeny test Pinus merkusii. The research was conducted on the 11-year-old P. merkusii with high resin yield half-sib, using an Incomplete Block with a Row Column Design sub-line system, namely sub-lines (KBS Sumedang, KBS Jember, and East Java). The genetic correlation between resin yield with height, diameter and free-branch height generally has a relatively small value. The resin yield with diameter growth in the sub-line of KBS Jember has a positive correlation and is moderate (0.526), but this is different in the genetic correlation of resin yield with moderate branch-free height but negative (-0.498). In the sub-line of East Java, the correlation of resin yield characteristic with diameter growth was moderate but negative (-0.434). Further selection in the Jember KBS sub-line could be aimed at wood and resin yield, however for the Sumedang and East Java KBS sub-lines, further selection was only intended for resin yield. Key words: Genetic correlation, resin yield, Pinus merkusii, sub-line, progeny test