HIBRIDISASI SILANG BALIK TEMBAKAU TEMANGGUNG UNTUK MENINGKATKAN KETAHANAN TERHADAP PENYAKIT "LINCAT"

Abstract

Back cross hibridization of Temanggung tobacco for in¬ creasing the lincat disease resistance

The back cross hibidization of Temanggung tobacco lines for increas¬ ing the " lincat" disease resistances was conducted Temanggung in 1997. The aim of this experiment was to produce some new Temanggung tobacco lines which ae resistant to root-knot nematode (Meloidogyne spp.) and bacteial wilt (Pseudomonas solanacearum) and have high productivity and grade index. These treatments consisted of eleven selected tobacco lines from the segregating progenies of crossing beetween Virginia and Temanggung to¬ bacco and the two Temanggung tobacco cua'vars arranged in randomized block design with three replications. The esults of this experiment showed that thee new tobacco lines (BC3.C-51, BC3.C-86, BC3.SG-86) were esis¬ tant toMeloidogyne spp. and P. solanacearum. The productivity of BC3.C-86 and BC3.SG-86 lines inceased 60.12% and 38.69% compared with Genjah Kemloko line. The productivity of BC3.C-5I line was equal to Genjah Kemloko, its quality raised 9.18%, and early loweing (dwarf* 69.65 days).