Evaluasi Tanaman Padi Haploid Ganda Calon Tetua Padi Hibrida terhadap Wereng Batang Coklat dan Hawar Daun Bakteri
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Date
2005
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BB Biogen
Abstract
The susceptibility of introduced hybrid rice to main rice pests and diseases, such as brown plant hopper (BHP) and bacterial leaf blight (BLB), is subject to be improved through the improvement of its parental lines, i.e. restorer and cms lines. From previous experiment, through anther culture of F1 from maintainer or restorer crossed to released varieties we obtained doubled haploid spontaneous plants or pure lines. The objectives of this research were to evaluate those doubled haploid plants to BHP and BLB. Standard Evalution System for Rice (SES, IRRI) were used to evaluate their resistance to those pest and disease. Plant materials used were a. 15 doubledhaploid plants (DH2) potential as cms lines derived from anther culture of F1 IR58025B x Sintanur (M1) and IR62829B x Ciherang (M2) and b. -17 doubled-haploid plants (DH2) potential as restorer lines derived from anther culture of F1 IR53942R x Ciherang (R1) and BR82735R x Sintanur (R2). All plant materials were exposed to BHP (biotype SU) and BLB straian IV and VIII. Bioassay with BHP biotype SU showed that for plants potential as maintainer lines their were 3 moderately susceptible lines and 12 susceptible lines, while for plants potential as restorer lines their were one resistance line (BioR-Ac-W-HD-15), one moderately resistance line (BioR-Ac-W-HD-16), 5 moderately susceptible lines and 10 susceptible lines. The result of bioassay with BLB strain IV and VIII in lines potential as maintainer were: a). For BLB strain IV we obtained one moderately resistance line (BioM-Ac-W-HD-4), while the rest (14 lines) were moderately susceptible, b). Forr BLB strain VIII we obtained 5 moderately resistance lines (BioM-Ac-W-HD-5,6,7,11 dan 12), while the other 10 lines were moderately susceptible. Furthermore, the result of bioassay with BLB strain IV and VIII in lines potential as restorer lines were: a). For BLB strain VI we obtained 2 moderately resistance lines (BioR-Ac-W-HD-15, and BioR-Ac-W-HD-16), while the other 15 lines were moderately susceptible, b). For BLB strain VIII we obtained 16 moderately resistance lines, i.e. BioR-Ac-W-HD-(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, dan 17), while one line were moderately susceptible. All lines having resistance and moderately resistance to WBC biotype SU and/or HDB strain IV and VIII will be evaluated futher.
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Doubled haploid, rice, BPH, BLB.