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,, Witjaksono
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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INDUKSI DAN KARAKTERISASI PISANG MAS LUMUT TETRAPLOID Poerba, Yuyu s; ,, Witjaksono; Ahmad, F.; Handayani, Tri
JURNAL BIOLOGI INDONESIA Vol 10, No 2 (2014): Jurnal Biologi Indonesia
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v10i2.2082

Abstract

Triploid banana breeding could be achieved by crossing tetraploid to diploid banana cultivars. The availaibility of tetraploidbananas is naturally very limited. One of methods to produce tetraploid bananas is inducing tetraploid plants usingchemicals that inhibit spindle fiber formation during mitosis such as oryzalin or colchicine. The present research is aimed toproduce and characterize tetraploid Pisang Mas Lumut (Musa acuminata, AAAA genome) induced by in-vitro oryzalintreatment from diploid Pisang Mas Lumut. Fifteen in vitro-cultured shoots were treated wih oryzalin at of 60μM for 7days in a liquid MS basal medium with addition of 2 mg/l BA. After 6 sub-cultured, 54 shoots and 104 plantlets wereproduced. Forty seedlings were then survived and grew well and healthy. Ploidy identification of induced Pisang MasLumut was conducted using Flowcytometer at seedling stage and repeated at reproductive phases for 2 cycles. The resultsshowed that oryzalin treatments produced tetraploids at a frequency of 30%, diploid at 65% and mixoploid at 5%. Thetetraploid plants have longer and thicker pseudostems, produce fewer suckers, drooping and larger leaves, and broader fruitscompared to its diploid control at harvest time. The tetraploid plants have similar genetic properties with their diploidcontrols as shown by genetic identity of 0.90-0.97.Key words: Pisang Mas Lumut, Musa acuminata, AA, oryzalin, tetraploid
PERBANYAKAN AMORPHOPHALLUS TITANUM BECC (ARACEAE) DENGAN TEKNOLOGI IN VITRO ,, Witjaksono; Nugraheni, Katarina Utami; Hoesen, Djadja SH; ,, Irawati
JURNAL BIOLOGI INDONESIA Vol 8, No 2 (2012): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v8i2.3056

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Propagation of Amorphophallus titanum Becc (Araceae) via In Vitro Technology. Amorphophallus titanum is a unique plant with gigantic inflorescence and radiating corpselike odorl and therefore has become a botanical flagship and attract visitors. Its existence innature may be endangered due to habitat conversion that reduce population size required for cross pollination to occur. Propagation via non-conventional technique is much needed for the resulting planting material to be exchanged among botanical garden or even traders. Mass propagation using in vitro technology has been successful. An improvement of the propagation method has been developed by incorporating high level of cyitokinin BA of 1-2 mg/l in the medium for shoot proliferation and lowering it to 0-0,1 mg/l for shoot elongation. Shoot elongation is effectively influenced by age and the phase of medium whereas the liquid phase induced the enlargement of the shoots significantly without even promoting any hyperhidricity.The plantlets produced survive acclimatization.Key words: Amorphophallus titanum, mass propagation, in vitro, mediurm cair, BA.
Deteksi Awal Ketahanan Beberapa Aksesi Pisang Lokal dan Hasil Persilangan terhadap Penyakit Layu Fusarium (Foc VCG 01213/16 TR4) Handayani, Tri; Martanti, Diyah; S. Poerba, Yuyu; ,, Witjaksono
Jurnal Hortikultura Indonesia (JHI) Vol. 8 No. 2 (2017): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (345.533 KB) | DOI: 10.29244/jhi.8.2.88-96

Abstract

ABSTRACTEarly detection for Fusarium wilt resistant of banana plants can be done at seedling phase under greenhouse condition. The purpose of early detection was to screen and evaluate some number of local and hybrid accession of banana plants for resistance to Fusarium oxysporum f. sp. cubense (Foc VCG 01213/16 TR4 or Foc TR4). The treatments were done by immersing the root seedling in Fusarium inoculant at concentration of 106 conidia mL-1, for 2 hours, then planted in sterile sand media and placed in container with "double tray system". Experiments were performed using 15 accessions of banana i.e. 1 accession of wild musa (Musa acuminata var. malaccesis), 7 local accessions and 7 hybrid bananas. Based on greenhouse bioassay, banana Rejang#2 (AA) showed resistance to Foc TR4. The results were consistent in the field condition. Tetraploid plants for pisang Rejang#2 (AAAA) also showed resistant to Foc TR4. Cultivar Cavendish (AAA) and Madu (AA) showed highly susceptible; Ustrali (AAAB) and Goroho (AAA) showed susceptible to Foc TR4. Wild banana (Musa acuminata var. malaccensis) and Mas Jambe 4x (AAAA) showed moderate susceptible. Of the total 7 hybrids accession; 3 hybrids showed moderate susceptible, and 4 other hybrids showed susceptible to Foc TR4.Keywords: banana plants, early detection, Foc TR4, hybrid, local ABSTRAK Deteksi awal tingkat ketahananan tanaman pisang terhadap penyakit layu Fusarium oxysporum f. sp. cubense (Foc) dapat dilakukan pada masa pembibitan di rumah kaca. Penelitian bertujuan untuk evaluasi awal tingkat ketahanan beberapa aksesi pisang liar, pisang lokal dan pisang hasil persilangan terhadap penyakit layu Fusarium. Akar bibit pisang pada air yang berisi inokulan Fusarium (Foc VCG 01213/16 atau Foc TR4) pada konsentrasi 106 konidia mL-1, selama 2 jam yang selanjutnya ditanam pada media pasir steril dan diletakkan pada kontainer dengan pengaturan “double tray system”. Lima belas aksesi pisang yang terdiri atas 1 aksesi pisang liar (Musa acuminata var. malaccensis), 7 aksesi pisang budidaya dan 7 nomor pisang hasil persilangan dievaluasi tingkat ketahanan terhadap Foc TR4. Dari hasil pengujian di rumah kaca, pisang Rejang#2 (AA) menunjukkan status tahan terhadap penyakit layu Fusarium Foc VCG 01213/16 TR4 yang hasilnya sesuai dan stabil dengan tingkat ketahanannya di lapangan. Pisang Rejang#2 tetraploid (AAAA) juga menunjukkan status tahan terhadap Foc TR4. Pisang Madu (AA) dan Cavendish (AAA) menunjukkan hasil sangat rentan, sedangkan pisang Goroho (AAA) dan pisang Ustrali (AAAB) menunjukkan status rentan. Pisang liar Musa acuminata var. malaccensis (AA) dan pisang Mas Jambe 4x (AAAA) menunjukkan status agak rentan. Pada seleksi pisang hasil persilangan, didapatkan 3 nomor pisang hibrid dengan status agak rentan yakni 816 MDRK, 1060 MDRK, 2284 MMRK, sedangkan 4 nomor hibrid lainnya menunjukkan status rentan.Kata kunci: deteksi dini, Foc TR4, hibrid, lokal, pisang
Co-Authors ,, Irawati Diyah Martanti, Diyah F. AHMAD Hoesen, Djadja SH Nugraheni, Katarina Utami S. Poerba, Yuyu Tri Handayani Yuyu S Poerba