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INDONESIA
Jurnal AgroBiogen
Published by Kementerian Pertanian
ISSN : 19071094     EISSN : 25491547     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Jurnal AgroBiogen memuat artikel primer dan sekunder hasil penelitian bioteknologi dan sumberdaya genetik tanaman, serangga, dan mikroba pertanian. Jurnal ini diterbitkan tiga kali setahun pada bulan April, Agustus dan Oktober oleh Balai Besar Penelitian dan Pengembangan Bioteknologi dan Sumberdaya Genetik Pertanian
Arjuna Subject : -
Articles 5 Documents
 1 
Search results for , issue "Vol 9, No 2 (2013): Agustus" : 5 Documents clear
Transformasi Genetik Tembakau dengan Gen Cold Shock Protein melalui Perantara Agrobacterium tumefaciens Seagames Waluyo; Sustiprijatno Sustiprijatno; Suharsono Suharsono
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.p58-65

Abstract

Coldshock protein (Csp) essential for organisms to survive inabiotic stress condition. CspB gene has been fused toubiquitin promoter in the T-DNA region of pCambia 1300int,and introduced into Agrobacterium tumefaciens LBA4404.This research had an objective to transform geneticallyNicotiana tabacum cv. Samsun by CspB gene under thecontrol of Ubiquitin promoter and NOS terminator mediatedby A. tumefaciens. Leaf discs were co-cultivated with A.tumefaciens LBA 4404. Based on the number of hygromycinresistantcalli, the efficiency of transformation was 57.5%. Inthe selective medium containing 50 μg/l hygromycin, theefficiency of regeneration of transgenic shoots was 82.6%.Based on PCR analysis using primers corresponding toubiquitin promoter and CspB gene, 18 putative tobaccotransgenic containing CspB gene under the control ofubiquitin promoter.
Seleksi In Vitro dan Pengujian Mutan Tanaman Pisang Ambon Kuning untuk Ketahanan terhadap Penyakit Layu Fusarium Deden Sukmadjaja; Ragapadmi Purnamaningsih; Tri P. Priyatno
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.p66-76

Abstract

Fusarium wilt of banana (Musa spp.) caused byFusarium oxysporum f. sp. cubense (Foc) is the most seriousproblem faced in banana cultivation in terms of plantproductivity and fruit quality. Mutation breeding is one of thealternative method that can be applied in producing newbanana cultivar. Mutants can be induced by chemicalmutagen such as ethyl methane sulfonate (EMS) followed byin vitro selection and then evaluation of the mutants tofusarium wilt disease in glasshouse and Foc infected field.The aim of this research was obtained EMS induced and invitro selected mutants of banana var. Ambon Kuning andevaluated Foc disease resistant clones in glasshouse andFoc infected field. The first step to obtain the explants forthis research was initiation and formation of multiple budclumps (MBC) using MS basal media supplemented with 5,10, and 20 mg/l of benzyladenin. Plant regeneration of MBCwas also studied by using MS media containing 0, 0.2, and 1mg/l of benzyladenin. To induce mutagenesis, MBC wassoaked in 0.1, 0.3, and 0.5% (v/v) EMS for 1, 2, and 3 hours.The assesment of resistant MBC mutants to Fusariumphytotoxin was conducted by using fusaric acid (FA) asselection agent in concentration of 30, 45, and 60 ppm.Putative mutant plants produced by in vitro selection werefurther tested using spore solution of Foc race 4 inglasshouse. Meanwhile, Foc resistance assesment in theinfected field was conducted in Pasirkuda ExperimentalStation, Bogor Agricultural University. The results showedthat MBC can be formed in MS basal media supplementedwith 10 or 20 mg/l benzyladenin. The EMS played a role inobtaining mutants by producing 68 MBC putative mutantstolerant to Foc based on FA selection. Further evaluation inthe glasshouse was obtained 64 Foc resistant plants from391 putative mutants produced by in vitro selection.Evaluation in the Foc infected field showed six clonessurvived until generative phase (12 month of age).
Pemurnian Parsial dan Karakterisasi Kitinase Asal Jamur Entomopatogen Beauveria bassiana Isolat BB200109 Yadi Suryadi; Tri P. Priyatno; I Made Samudra; Dwi N. Susilowati; Nuni Lawati; Eman Kustaman
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.p77-84

Abstract

Beauveria bassiana is one of theentomopathogenic fungus that produces chitinase wheninfecting its host. This study was aimed to purify, isolate andcharacterize chitinase of B. bassiana isolate BB200109.Pathogen identity was determined both morphologically andmolecularly using ITS primer, whilst characterization wasdone at various conditions i.e. temperature, pH, metal ionand incubation time. Results showed that the BB200109isolate belonged to B. bassiana. The isolate producedextracellular chitinase with chitinolytic index of 1.035. Partialpurification of three saturated ammonium sulphateprecipitation (10, 30, and 70%) showed maximum purity of1.2 times, while dialysis could increase the purity of 1.9times compared to that of crude enzyme extract.Characterization results showed that the chitinase isolatedfrom B. bassiana isolate BB200109 had an optimum activityat pH 4, temperature 50oC, and optimum incubation time of90 minutes. The effect of metal ions (60 mM) Mn2+ served asactivator, while EDTA, K+, Mg2+, Cu2+, Fe2+, Zn2+, and Na+acted as inhibitors. The chitinase demonstrated loweraffinity to chitin substrate as indicated by high Km value of0.266 mg/l and a Vmax of 0.067 mg/l sec. Based on SDS-PAGE,chitinase from B. bassiana isolate BB200109 had molecularweight of 60.25 kDa. The study implied the potency ofB. bassiana isolate BB200109 as extracellular chitinaseproducer with its enzyme charateristics seems to bedeveloped as an insect biocontrol agent.
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.
Gen dan QTL Pengendali Umur pada Kedelai Tasma, I Made
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.p85-96

Abstract

Traits that control time of flowering andmaturity in soybean determine harvesting time of a soybeancultivar. In Indonesia, early maturing soybean cultivars areimportant at short period growing seasons due to the watershortage in dry planting season. Shorter period of growingseason would increase the crop harvest index. Geneticdiversity of the present soybean germplasm collection islow. Diversity improvement through introduction fromcountries with four seasons faced difficulty due todifferences in growth adaptability. Technology for developinggermplasm with a broader adaptation will facilitategermplasm movement from a more diverse environmentalgrowth. The objective of this review was to describe howthe time of flowering and maturity are controlled in soybean.The review is supported by flowering time mechanism ofthe model plant Arabidopsis thaliana as the genetics offlowering time has been intensively studied in this modelplant. Transition from vegetative to reproductive developmentis the outcome of the activation of genes responsiblefor floral organ formation. Initial activation is generally theresult of environmental cues indicating the appropriate timeto flower. Studies from Arabidopsis showed that transitionfrom vegetative to reproductive stage is complex involvingmany genes and several genetic pathways. In soybean, timeof flowering and maturity are controlled by at least ninegenes, E1 to E8 and Dt1. The genes interact with daylengthand temperature. Major and minor QTLs controlling thetraits were identified using various mapping populations.The major QTLs were detected at various populations withdiverse genetic backgrounds tested at diverse environmenttalconditions. Some of the QTLs were associated with the Egenes and some others were not. Several Arabidopsisflowering gene homologous sequences were also mappedon the soybean genome. The E gene markers and the QTLswith large effect for reproductive traits are breeder targetsfor breeding and development of soybean photoperiodinsensitive germplasm. Genes for flowering time isolatedfrom Arabidopsis can be used to develop transgenicsoybean with broader adaptation. Technology for developmentof soybean germplasm with broader adaptation willfacilitate the soybean germplasm movement from diverseenvironmental growth conditions to support systematic andsustainable national soybean breeding programs.

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