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Joko Prasetiyono
Balai Besar Penelitian dan Pengembangan Bioteknologi dan Sumberdaya Genetik Pertanian, Jl. Tentara Pelajar 3A, Bogor 16111 Telp. (0251) 8337975; Faks. (0251) 8338820
Agriculture, Biological Sciences & Forestry

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Seleksi dan Konfirmasi Alel Gen-gen Hd pada Padi Berumur Genjah dan Produktivitas Tinggi Persilangan Code x Nipponbare Ahmad Dadang; Tasliah Tasliah; Joko Prasetiyono
Jurnal AgroBiogen Vol 9, No 1 (2013): April
Publisher : Balai Besar Penelitian dan Pengembangan Bioteknologi dan Sumber Daya Genetik Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jbio.v9n1.2013.p11-18

Abstract

To support the IP 300 program rice varietieswith both early maturity and high productivity are needed.The objective of the research was to improve those traits inCode variety using RIL (recombinant inbreed line) methods.The research was conducted in the year 2009-2011 at thegreenhouse and laboratory of Molecular Biology, IndonesianCenter for Agricultural Biotechnology and GeneticResources Research and Development. Materials consistedof 600 individuals of F2 derived from one of F1 Code xNipponbare crossed plants and they were planted up to F4with seed-to-seed, then confirmed by 8 microsatelitemarkers linked to loci of Hd genes. The molecular analysisshowed that 84 of 600 F2 plants produced. The F4 plants have50% of flowering time shorter than F2 and F3 plants. Twolines (CdNb_388 and CdNb_270) have higher productivitycompared to Code by the number of productive tillers (20)and the number of tiller grains (2240 and 1740) and haveclosely 50% of 60 days flowering time of Nipponbare. Threelines of F4 plants (CdNb_270, 364, and 388) were predictedto have allele of Hd7 gene, and CdNb_472 was predicted tohave alelle of Hd14 gene.
Pemetaan, Karakterisasi, dan Pengembangan Primer-primer Lokus Pup1 (P uptake 1) pada Padi untuk Peningkatan Toleransi terhadap Defisiensi Fosfor Joko Prasetiyono; Tasliah Tasliah
Jurnal AgroBiogen Vol 8, No 3 (2012): Desember
Publisher : Balai Besar Penelitian dan Pengembangan Bioteknologi dan Sumber Daya Genetik Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jbio.v8n3.2012.p120-129

Abstract

Phosphorus (P) is the second most important nutrient forplants after nitrogen, but is available in very low amount. Pdeficiency in rice would reduce the number of tillers andgrain production. There are numerous publications onexploration of genes that are associated with P. Manyresearches on P that are directed to breeding program andinvolving many countries/institutions focus on Pup1research. Pup1 (P uptake 1) is associated with P uptake hasbeen well mapped on chromosome 12 at a distance of 15.31to 15.47 Mb and microsatellite markers between RM28073and RM28102 can be used as a selection tool in the MAB(Marker Assisted Backrossing) program. Indonesia is veryconcerned with this research because of P-deficientproblem. This review aims to provide current information ofresearch that explore the genes in Pup1 locus. This reviewoutlines the history of Pup1 mapping, to explain sequenceand expression analysis of Pup1, and to inform of Pup1specific primers. The latest information is expected to beuseful for rice breeders in Indonesia, especially for thosewho are interested to P deficiency research. Study of geneswithin Pup1 locus is still ongoing, and found that somegenes do not contribute directly to P uptake. This mayindicate that Pup1 locus use other mechanisms in the Puptake. This may indicate that some genes (dirigent-like,fatty acid α-dioxygenase, aspartic proteinases) play a role inthe increasing level of lignin in P deficient condition.Increasing level of lignin would increase the volume of rootsand thus increasing P uptake and resistance to biotic andabiotic stresses. Specific markers to detect the genes in thePup1 locus have been successfully developed, and can beused for breeding and exploration activities on Indonesianrice germplasm.
Identifikasi Molekuler Hawar Daun Bakteri (Xanthomonas oryzae pv. oryzae) dan Uji Patogenisitasnya pada Galur-galur Padi Isogenik Tasliah Tasliah; Mahrup Mahrup; Joko Prasetiyono
Jurnal AgroBiogen Vol 9, No 2 (2013): Agustus
Publisher : Balai Besar Penelitian dan Pengembangan Bioteknologi dan Sumber Daya Genetik Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jbio.v9n2.2013.p49-57

Abstract

Identification of Xanthomonas oryzae pv.oryzae (Xoo) based on molecular analysis has beenintroduced just few years ago. This method used somespecific primers for Xoo and can be done quickly. Thepurposes of this research were to identify isolate Xoooriginated from five locations in Indonesia and to determinethe level of pathogenicity of these bacteria. Studies wereconducted in the greenhouse and the Molecular BiologyLaboratory of ICABIOGRAD, from 2011 to 2012. Bacterialisolates were taken from five regions in Indonesia, namely:West Sumatra, West Java, Central Java, South Sulawesi, andWest Kalimantan. The specific primers of Xoo wereXoo2967, Xoo80, and Xoo. Results showed that 216 isolatescould be grown to form yellow colored colonies, whichbelongs to a criterian for Xoo. Molecular analysisdemonstrated that 189 isolates were Xoo and 27 isolateswere not. Amplification of DNA of the isolates resulted a 337bp PCR product for primer Xoo2976, 700 bp for primerXoo80 and 534 bp for primer Xoo. Pathogenicity tests of theXoo isolates showed xa5, Xa7, and Xa21 resistance geneswere still effective againts BLB pathogens originated fromthose five regions, with percentage of resistance were 93.57,77.49, and 85.37%, respectively.
Co-Authors Ahmad Dadang Mahrup Mahrup Tasliah Tasliah