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Susanto, Untung
Indonesian Center for Rice Research of Indonesian Agency for Agricultural Research and Development
Agriculture, Biological Sciences & Forestry

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Genetic Variability and Heritability of Green Super Rice (GSR) Lines Resistance to Rice Ragged Stunt Virus (RRSV) and Rice Grassy Stunt Virus (RGSV) Susanto, Untung; Nafisah, Nafisah; Rohaeni, Wage R.; E., Baehaki S.; rahman, Sarlan Abdul; Ali, Jauhar
Jurnal Penelitian Pertanian Tanaman Pangan Vol 3, No 3 (2019): Desember 2019
Publisher : Pusat Penelitian dan Pengembangan Tanaman Pangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (548.012 KB) | DOI: 10.21082/jpptp.v3n3.2019.p111-116

Abstract

Brown plant hopper (BPH) is one of the main pest of rice in Indonesia and it occurred every years with fluctuate acreage.  BPH is also vector of Rice Ragged Stunt Virus (RRSV) and Rice Grassy Stunt Virus (RGSV).  Green Super Rice (GSR) was designed to have resistance to major pests and diseases so that it need less pesticides and thus save ro environment. GSR was developed in IRRI and China and was tested in Indonesia since 2009 until now (2019).  This research was aimed to study the genetic variability and heritability of 26 selected GSR lines to RRSV and RGSV along with four check varieties.  The experiment was conducted in ICRR Sukamandi and Pusakanagara Experimental Station.  The experiment was arranged following randomized complete block design with three replications.  Transplanting was done into 21 days old seedling into 25 cm x 25 cm planting space of 1 m x 1 m plot.  BPH and virus investation was occured narturally due to BPH outbreak along the season (DS 2010).  Percentage of plant showing RRSV and RGSV symtom was measured as consideration the resistance of plant to the viruses.  The results showed that the tested genotypes had high genetic variability and heritability classified as medium in the resistance to RGSV.  The genotypes showed low genetic variability and heritability in the resistance to RRSV.  It implies that breeder effort is feasible to develop resistant lines to RGSV.  HUANGHUAZHAN and HHZ 12-Y4-Y3-Y1 are consistently resistant to RGSV and can be used as donors in further plant breeding activities. The selection of resistant individuals in populations of plant breeding material recommended to be done on earlier generations for RGSV and further generation for RSSV.
Kesesuaian Galur Padi (Oryza sativa) pada Lahan Sawah Tadah Hujan Susanto, Untung; Arifin, Samsul; Rohaeni, Wage R.; Wening, Rina H.
Jurnal Penelitian Pertanian Tanaman Pangan Vol 4, No 3 (2020): Desember 2020
Publisher : Pusat Penelitian dan Pengembangan Tanaman Pangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jpptp.v4n3.2020.p119-124

Abstract

Rice productivity in rainfed area is mostly determined by the environmental condition, cultivation technique, specific stress occurrence, and the variety planted. There are around 4 million ha of rainfed lowlands in Indonesia, contributing the second biggest supply for national rice production after the irrigated area. Planting the most suitable rainfed lowland rice variety is expected to increase rice yield in the area. This research was aimed to test 34 rainfed lowland rice lines along with five check varieties in two targeted areas, i.e. Purwakarta during Dry Season 2015 (transplanting technique of 21 days old seedlings) and Pati during Wet Season 2015/2016 (using direct seeded or gogo rancah planting method). The treatments were arranged in a randomized complete block design with three replications, at 3 x 5 m2 plot, and 25 cm x 25 cm plant spacing. Results showed the existence of genetic x environment interactions of all observed traits, except for tiller number. Grain yield, tiller number, and number of filled grains/panicle in Purwakarta was each higher than that in Pati. Seven lines were identified as having high yield in Purwakarta and were medium in Pati, and five lines were high yield in Pati and were medium in Purwakarta. Line IR83383-B-B-129-4 (10.35 t/ha) yielded higher compared to the best check Inpari 13 (8.27 t/ha) in Purwakarta. Most of lines in Pati had comparable yield with the best check Inpari 23 (7.18 t/ha). Grain yield was positively correlated with number and percentage of filled grains/panicle and negatively correlated with number of unfilled grains/panicle. Keywords: R
Co-Authors Ali, Jauhar Arifin, Samsul E., Baehaki S. Nafisah, Nafisah rahman, Sarlan Abdul Rohaeni, Wage R. Rohaeni, Wage R. Wening, Rina H.