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Abstrak :
Penelitian dilakukan untuk mengetahui pengaruh pemberian strain Nostoc CPG8, CPG24, dan CIM7 terhadap pertumbuhan vegetatif dan generatif padi varietas Ciherang. Data dianalisis secara statistik dengan uji ANOVA dan LSD, kecuali data jumlah daun, dianalisis secara deskriptif. Hasil penelitian menunjukkan pemberian strain Nostoc CPG24 dan CIM7 berpengaruh nyata meningkatkan tinggi tanaman akhir (P < 0,05). Strain Nostoc CPG8 dan CPG24 berpengaruh nyata menurunkan jumlah buah kosong (P < 0,05). Pemberian ketiga strain Nostoc tidak berpengaruh nyata terhadap parameter vegetatif panjang akar dan parameter generatif jumlah bulir, jumlah buah berisi, berat basah dan berat kering tanaman tanpa buahbuahh total buah per rumpun, jumlah buah bernas per rumpun, jumlah buah kosong per rumpun, berat basah tanaman, dan berat basah, serta berat basah dan berat kering buah. ......This experiment was conducted to see the effect of Nostoc strains CPG8, CPG24, and CIM7 to vegetative and generative growth of Ciherang varieties of rice. Data was analyzed used statistics, with ANOVA and LSD, except for leaf total was used descriptive. The result showed that Nostoc strains of CPG24 and CIM7 increased plant height (P < 0,05). Nostoc strains of CPG8 and CPG24 decreased the number of filled out grains (P < 0,05). Those three Nostoc strains had not affect increase root length, the number of panicles, the number of filled grains, fresh and dry weight plants without grain, and fresh and dry weight grains.

Abstrak :
An F2 rice population developed from a cross between a backcross inbred line (BIO-148) and its recurrent parent (IR64) was used to identify quantitative trait loci (QTL) for awn, panicle exertion and total spikelet number. BIO-148 is a BC2F8 line derived from a cross between IR64 (a high-yielding lowland rice variety) and Gajah Mungkur (an upland tropical japonica rice variety). Two hundred plants were grown in the greenhouse, and their DNAs were isolated for genotyping using SSR markers. Panicle exertion was observed during the grain-filling stage. The awn length of the seed and the total spikelet number per panicle were observed after harvesting. A total of four QTLs were identified using single-marker regression with LOD>3, explaining 8.4-18.1% of phenotypic variation. A QTL for awn was identified on Chromosome 8. A QTL for incomplete panicle exertion was identified on Chromosome 4. Two QTLs for total spikelet number were identified on Chromosome 4, in which the BIO-148 allele contributed to a higher number of spikelets per panicle. The QTLs identified in this study will be useful in the improvement of yield potential for modern lowland indica rice varieties by harnessing the hidden useful alleles from upland tropical japonica rice varieties.