Simultaneous Selection of Rice Genotypes Tolerant to Anaerobic Germination

Abstract

Farmers mainly cultivate direct seeding in rainfed and swampy areas, which flood stress occurs. This stress causes the ability of coleoptile seeds to grow are inhibited, and only the genotype that is tolerant to anaerobic stress conditions in the germination phase (anaerobic germination-AG) can grow well. The study aimed to select rice genotypes based on yield, AG tolerance, and resistance to pests and diseases. The material used was 25 rice genotypes of rainfed lowland. The research consisted of yield trials, screening of main pests and diseases, and screening anaerobic germination stress. All trials were conducted in 2017. The results showed ten genotypes with yields above 6.5 t ha-1, not significantly different to the best check Inpari 39. Nine genotypes were resistant to brown planthoppers, 19 genotypes were resistant to bacterial leaf blight, and some genotypes were resistant to some races of blast. Screening of AG stress showed that four genotypes had growth percentage and shoot elongation not significantly different to AG tolerant check. Based on the simultaneous selection, it was selected 11 genotypes to continue to evaluate in the multilocation yield trial, which were BP20106C-SKI-3-1-0, IR83142-B-49-B-IND, IR 83381-B-B-6-1, IR 83376-B-B-130-3, IR 129336:11-19-Ski-0-Kn-3, IR 129336:11-8-Ski-0-Kn-8, IR 129336:11-8-Ski-0-Kn-11, B14316E-KA-15, and B14864E-SKI-7-6-2.

Study of Rice (Oryza sativa) Seed Breeding Based on Farmer Groups in Pangandaran Regency, West Java Province, Indonesia

“…Oryzae (Xoo) can reduce rice yield by 30-40%. Data on rice productivity of Inpari 32 and 42 varieties at the location of the breeding demfarm are presented in Table 1 In table 1, it can be seen that based on the results of the tile samples, the Inpari 32 and Inpari 42 varieties gave lower yields compared to the results based on the description, which were 6.30 t/ha and 7.11 t/ha, respectively [10]. Meanwhile, based on real yields, the 10-hectare demfarm yielded 44.90 tons of grain, namely 23.38 tons of Inpari 32 variety and 21.52 tons of Inpari 42 variety.…”

“…From 2007 to 2020, the Indonesian Agency for Agricultural Research and Development (IAARD) through the Indonesia Institute for Rice Research (IIRR), has released more than 100 NSRVs of site-specific rice for all agroecosystems [10]. However, the use of new certified superior varieties of rice seeds at the farmer level as rice producers is still low.…”