Karakter Agronomi Dan Ketahanan Beberapa Galur Pelestari Dihaploid Terhadap Hawar Daun Bakteri

Abstract

Agronomic Characters and Resistance of Several Dihaploid Maintainer Lines to Bacterial Leaf Blight. Bacterial blight (Xanthomonas oryzae pv. oryzae, Xoo) is one of the most serious diseases of rice in Indonesia. From previous research thirteen lines of dihaploid (DH) maintainer lines-derived anther culture were selected for developing cytoplasmic male sterile lines. In this research those DH maintainers were evaluated for their agronomic characters such as plant height, number of productive tiller, and seed weight per hill as well as their resistance to Bacterial Leaf Blight (BLB) pathotypes III, IV and VIII at Indonesian Center Rice Research (ICRR), Sukamandi during wet season 2008/2009. The results showed that 10 DH maintainer lines i.e. BioMAc18-H36-3-Ma, BioMAc19-H36-3-Mb, BioMAc20- H36-3-Mc, BioMAc21-H36-4-M, BioMAc26-B1-1-Mb, BioMAc29-B2-1-Db, BioMAc31-B2-1-M, BioMAc33-B2-4- Pb, BioMAc34-B4-1-Da and BioMAc35-B4-1-Dc having plant height ranged from 88.79-104.08 cm, productive tiller ranged from 9 to 13 tillers/hill. Among those DH maintainer lines three lines were resistant to BLB pathotype III, i.e. BioMAc26-B1-1-Mb, BioMAc29-B2-1-Db and BioMAc31- B2-1-M lines, and two lines, i.e. BioMAc21-H36-4-M and BioMAc35-B4-1-Dc were highly resistant to BLB pathotype VIII. Only BioMAc35-B4-1-Dc lines highly resistant to BLB pathotype IV