Efforts to increase rice food production in the future are faced with increasing climate uncertainty due to global climate change. One of the impacts is changes in strains or biotypes of pests and diseases, which are increasingly rapid. To minimize the impact of climate change on national rice production. The purpose of this study was to produce upland rice lines that resistant to blast disease and had good rice quality. The research carried at Lampung and Sukabumi of 2018. A total of 17 lines and three comparison varieties tested using a randomized block design with four replications. Observations made on the agronomic character, yield components and quality of rice. The results showed that the average plant height in the two locations ranged from 90 to 136 cm. The number of productive tillers at two locations it’s the average of 11 panicles. The mean flowering age did not differ from the harvest age between the lines tested at the two locations. The length of panicle lines tested at two locations averaged 25.5 cm. The average weight of 1000 grains at both locations is 26.1 grams. Grain yield in Lampung averaged 4.7 t ha−1, higher than in Sukabumi 3.6 t ha−1. Five lines had no significant difference with Limboto both at the Lampung location and in Sukabumi. Among all the lines tested, there are three lines with the medium of chalkiness or LMM size. The results of testing in the greenhouse against blast disease obtained one line resistant to three blast races.

Drought is a major problem in rice production in rainfed areas. Climate change has exacerbated the negative effect of drought on the sustainability of rice production. Development of drought tolerant rice varieties is important strategy to minimize rice yield losses in drought prone areas. This study aimed to determine drought tolerance of twenty-five advanced rice breeding lines under artificial drought environment and to evaluate their agronomic performance in rainfed lowland rice areas. Evaluation of drought tolerance was carried out at seedling stage in greenhouse. Yield trial was conducted in rainfed rice area in Indramayu district, West Java province, during wet season 2017-2018. The trial was designed in randomized complete block design with four replications. Result from this study indicated a variation in drought tolerance of twenty-five breeding lines. Two lines showed highly tolerant response to drought in seedling stage namely B15231-MR-10-1 and B15143C-TGB-12. The grain yield of highly drought tolerant rice line B15231-MR-10-1 (4.81 t ha-1) was comparable to popular rice varieties Situ Bagendit (4.56 t ha-1) and Ciherang (5.09 t ha-1). Drought tolerant rice breeding lines identified from this study have potential to be adopted by farmers in drought prone rainfed areas as an adaptation strategy to the impact of climate change.

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ABSTRACT<br />The limited fertile land and increasing flood intensity as a result of global climate changes become serious constraints in the sustainability of national rice production. Improvement of rice varieties, especially for rice cultivation in swampy area is necessary. The objective of this research were to evaluate responses and productivity of rice genotypes to stagnant flooding stress which occurs on swampy area. A total of 22 genotypes had been tested, included Tapus, IR42, and IR64 as check varieties. Water level at stagnant flooding environment was 50-60 cm and  started from 35 days after planting until harvest. Research was conducted in wet season of 2011/2012 at Babakan Experimental Farm, Bogor Agricultural University. The experiment used randomized block design with three replicates. The results showed that stagnant flooding stress caused an increase in plant height, flowering and maturity date, number of unfilled grain, and stem elongation ability. On the other hand, the number of productive tiller and the number of filled grain decreased. The number of filled grain positively correlated with grain yield (r = 0.74**), but stem elongation ability didn’t have strong correlation with grain yield (r = -0.29). Genotypes IPB107-F-5-1-1 and IPB107-F-82-2-1 showed the highest productivity, 5.47 ton ha-1 and 5.80 ton ha-1,, respectively, at which productivity decreased up to 20% compared to optimum condition. <br />Keywords: basin swampy rice, stagnant flooding