8 research outputs found
Interaksi Genotipe X Lingkungan Untuk Hasil Gabah Padi Sawah
Full text linkGrain yield of rice is determined by genotype (G), environment (E), and interaction between genotype x environment (G x E). Variety can achieve its maximum yield potential if it is grown in suitable environments. This study was aimed to determine the adaptability and the yield stability of rice genotypes grown in different environments. Sixteen rice genotypes were tested using RBD in 16 sites during the wet season of 2010/2011, and dry season of 2011. The tested rice lines were developed for resistance to pest and diseases. The experiment unit was 4 m x 5 m of plot, plants were fertilized with urea, SP36, and KCl at rates of 250 kg/ha, 100 kg/ha, and 100 kg/ha, respectively. Variable observed was grain yield per plot. Combined analyses of variance showed that there was no lines yielded higher than did check variety Conde. The AMMI analysis showed that the largest variation was contributed by the environment factors (76.49%), genotype x environment interactions (17.55%), and the smallest was contributed by the genotypes (5.97%). Data exploration using boxplot method indicated that the low contribution of the genotype x environment interaction variance in this study was due to the high degree of similarity of yield potentials among the genotypes, and due to high similarity of environmental conditions of the sites.Based on the analysis of AMMI 2, lines B12743 - MR-18-2-3-8, IPB107-F-82-2-1, and Conde was each classified as widely adapted genotypes, while G8, IPB107-F-27-6-1, and BIO111-2-BC-PIR-3714, each was considered as genotype having a specific adaptation
Pendugaan tindak gen ketahanan terhadap virus tungro pada varietas padi=Gene action estimation of resistance gene to Tungro virus disease on rice
Get PDFABSTRAK
The objective of the study is to estimate the gene action of resistance gene to rice tungro virus disease. For that purpose, three parental line i.e. Seratus Hari T-36 (resistant), Utri Merah-1 (resistant), and Cisadane (susceptible) were crossed without reciprocal to produce Fl, F2, BC1, and BC2. Population (P, Py Fv F2, RCV and BC2) from all crosses were inoculated with tungro virus by infected green leafhopper at 14 days after seedling. Then they were grown in endemic area at Tanjung-siang, Subang, West Java. Observed characteristic was visual symptom using resistant scoring index according to Hasanudin et.al. (1988) and absorbent value using ELISA test according to Koenig method (1981).
The results showed that scoring index of Seratus Hari T-36 X Cisadane and Seratus Hari T-36 X Utri Merah-1 crosses adequately correspond to additive-dominance model with significantly additive effect. Utri Merah-1 X Cisadane cross adequately correspond to epistatic model. Dominance effect was found on Seratus Hari T-36 X Cisadane cross. The absorbent value result of Seratus Hari T-36 X Cisadane and Utri Merah-1 X Cisadane crosses showed the same conclusion with resistance scoring index.
Keywords: rice â tungro virus â gene action â resistanc
Pendugaan Tindak Gen Ketahanan Terhadap Virus Tungro Pada Varietas Padi (Gene Action Estimation of Resistance Gene to Tungro Virus Disease on Rice)
Get PDFThe objective of the study is to estimate the gene action of resistance gen to rice tungro virus disease. For the purpose, three parental line i.e. Seratus Hari T-36 (resistant), Utri Merah-1 (resistant), and Cisadane (susceptible) were crossed without resiprocal to produce F1, F2, BC1, and BC2. Population (P1, P2, F1, F2, BC1, and BC2) from all crosses were inoculated with tungro virus by infected green leafhopper at 14 days after seedling. The the were grown in endemic area at Tanjung-siang, Subang, West Java. Observed characteristic was visual symptons using resistant scoring according to Hasanudin et al. (1988) and absorbent value using ELISA test according to Koenig methode (1981).
The result showed that scoring index of Seratus Hari T-36 X Cisadane and Seratus Hari T-36 x Utri Merah-1 crosses adecuately correspond to additive-dominance model with significantly additive effect. Utri Merah-1 X Cisadane cross adequately correspond to epistatic model. Dominance effect was found on Seratus Hri T-36 X Cisadane cross. The absorbent value result of Seratus Hari T-36 X Cisadane and Utri Merah-1 X Cisadane crosses showed the same conclusion with resistance scoring index.
Keywords : rice, tungro virus, gene action, resistanc
Deskripsi varietas padi
No full textSalah satu program pemerintah untuk mencapai ketahanan pangan nasional adalah dengan swasembada beras. Untuk meningkatkan produksi beras diperlukan berbagai inovasi teknologi, salah satunya adalah penggunaan varietas unggul benih padi. Banyaknya varietas unggul baru yang dilepaskan oleh lembaga penelitian membutuhkan sosialisasi agar dapat diterapkan oleh masyarakat petani. Buku ini mendiskripsikan aneka varietas unggul baru padi sawah, padi tipe baru, padi hibrida, padi ketan, padi gogo, serta padi rawa pasang surut.v, 80 p.: ill.; 25 cm
