, Satoto
Balai Besar Penelitian Tanaman Padi Jl. Raya Sukamandi Km 5, Subang-Jawa Barat

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PENGARUH APLIKASI ASAM GIBERELIN (GA3) TERHADAP HASIL BENIH PADI HIBRIDA Susilawati, Pepi Nur; Surahman, Memen; Purwoko, Bambang S.; Suharsi, Tatiek K; Satoto, ,
Jurnal Pengkajian dan Pengembangan Teknologi Pertanian Vol 17, No 2 (2014): Juli 2014
Publisher : Jurnal Pengkajian dan Pengembangan Teknologi Pertanian

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Abstract

The Effect of Giberelin Acid (GA3) Application to Seed Yield of Hybrid Rice. Seed yield of rice hybrid on three line system has weakness in panicle exertion and outcrossing that cause low yield.  GA3 has been proved to increase the seed set through increasing panicle exertion and improved outcrossing. The purpose of this study was to determine the effect of GA3 application to increase seed yield of hybrid rice (F1). The study was conducted in Singamerta Experimental Farm, Banten Assesment Institute for Agricultural Technology from May to October 2013. The experiment was arranged in a split plot designed with four replications. The main plot were parental lines (cytoplasmic male sterility/CMS and restorer/R) of hybrid i.e. HIPA 8 (A1 and BP51-1), HIPA 6 (A2 and B8094), HIPA Jatim 3 (A6 and PK88) and HIPA 14 SBU (A7 and BH33d-Mr-57-1-2-2). Sub plot were the  frequency of GA3 treatments i.e. control (W0), two (W1), and three (W3) times application of GA3. GA3 dosage was 200 ppm, the best dose from the previous studies. The results showed that the GA3 applications increased plant height, stigma exertion, panicle exertion, duration of floret opening and panicle length. Two times application (W1) of  GA3  gave the best results as indicated by the highest seed yield (1429 kg/ha) that was better than three times application of GA3 that gave seed yield 1215 kg/ha and control with yield of 703 kg/ha.Keywords : GA3, hybrid rice, seed yieldABSTRAKHasil benih padi hibrida sistem tiga galur memiliki kelemahan, yaitu rendahnya eksersi malai dan tingkat penyerbukan silang,sehingga hasilnya rendah. Percobaan terdahulu menunjukkan bahwa aplikasi GA3 dapat meningkatkan hasil melalui peningkatan eksersi malai dan penyerbukan silang. Penelitian ini bertujuan untuk mengetahui pengaruh frekuensi aplikasi GA3 terhadap peningkatan hasil benih padi hibrida (F1). Penelitian dilakukan di Kebun Percobaan Singamerta, Balai Pengkajian Teknologi Pertanian (BPTP) Banten pada Mei sampai Oktober 2013. Penelitian menggunakan rancangan petak terbagi dengan empat ulangan. Petak utama yaitu tetua padi hibrida (galur mandul jantan/GMJ dan restorer) yaitu HIPA 8 (A1 dan  BP51-1), HIPA 6 (A2 dan B8094), HIPA Jatim 3 (A6 dan PK88) dan HIPA 14 SBU (A7 dan BH33d-Mr-57-1-2-2). Anak petak ialah tiga taraf frekuensi penyemprotan GA3 terdiri atas : kontrol (W0), dua kali aplikasi (W1) dan tiga kali aplikasi (W2). Dosis GA3 yang digunakan adalah 200 ppm yang merupakan konsentrasi terbaik dari hasil penelitian terdahulu. Hasil penelitian menunjukkan bahwa aplikasi GA3 mampu meningkatkan tinggi tanaman, eksersi malai, eksersi stigma dan durasi bunga membuka dibandingkan kontrol. Hasil yang terbaik dicapai pada perlakuan GA3 dengan dua kali aplikasi (W1). Hasil benih  pada perlakuan W1 mencapai 1429 kg/ha, lebih tinggi dibandingkan dengan aplikasi tiga kali GA3 (1215 kg/ha) dan kontrol (703 kg/ha).Kata kunci : GA3, padi hibrida, hasil benih
Penampilan Fenotipik dan Tingkat Kemandulan Tepungsari Calon Galur Mandul Jantan Tipe Wild Abortive Rumanti, Indrastuti Apri; Satoto, ,; Munarso, Yuniati Pieter
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 35 No. 3 (2007): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (45.816 KB) | DOI: 10.24831/jai.v35i3.1325

Abstract

Wild Abortive (WA) type of cytoplasmic male sterility (CMS) was developed by Indonesian Center of Rice Research, Sukamandi through backcross method. Pollen sterility and phenotypic acceptability evaluation of cytoplasmic male sterile (CMS) candidates were considered important in CMS development process. Both of evaluation were done during dry season 2002 and wet season 2002/2003. The materials were 18 CMS candidates and their resembled maintainers. Each line planting on two rows (2.5 m each) with 20 x 20 cm spacing. Observations were done for 50% flowering time, pollen sterility and phenotypic acceptability. The results of observations showed that : (a) the variation of pollen sterility among 18 CMS candidates were 82.5 - 100%; (b) Nine CMS candidates were consistent in sterility (100%) and good in phenotypic acceptability during the two seasons. Those lines were derived from IR62829A/BP1082, IR68897A/S3613F, IR66707A/Barumun, IR58025A/S24731, IR62829A/BP68C, IR68886A/IR71605, IR66707A/A2790, IR69622A/IRBB5 and IR68886A/T12357. The male parent as donor were elite lines with some good characters such as good eating quality, resistant to Rice Tungro Virus (RTV) and Bacterial Leaf Blight (BLB).   Key words : Rice, cytoplasmic male sterile, pollen sterility, phenotypic acceptability