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All Journal Indonesian Journal of Agricultural Science AGRIVITA, Journal of Agricultural Science Jurnal Penelitian dan Pengembangan Pertanian
Yuni Widyastuti
Indonesian Center for Rice Research
Agriculture, Biological Sciences & Forestry

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DIVERSITY AND CAPABILITY ANALYSES OF FERTILITY RESTORER GENES OF CYTOPLASMIC MALE STERILE RICE LINES USING SSR Yuni Widyastuti; Muhamad Yunus; Bambang Sapta Purwoko; Satoto Satoto
Indonesian Journal of Agricultural Science Vol 18, No 2 (2017): December 2017
Publisher : Indonesian Agency for Agricultural Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/ijas.v18n2.2017.p43-50

Abstract

Development of hybrid rice depends on the effectivity of cytoplasmic male sterility (CMS) and restorer (R) lines.  The molecular genetic approach is expected to help the breeder in identification of suitable parental lines to hybrid rice improvement. The study aimed to assess genetic relationship among three types of CMS systems (wild  abbortive/WA Kalinga and Gambiaca) as female parents and to identify diversity of genes controlling fertility restoration in rice. The study used nine F1 hybrids and F2 populations obtained from the hybridization of three different CMS lines (IR58025A-WA, IR80156A-Kalinga and IR80154A-Gambiaca) with three restorer lines (PK90, PK12 and BP11). Fifteen SSR markers were used to select genomic regions of chromosome 1 and 10 on which Rf3 and Rf4 genes located in the hybrids. The results showed that fertility restoration in CMS-WA and CMS-Gambiaca was governed by two independent and dominant genes (Rf3 and Rf4), while in CMS-Kalinga the fertility restoration was controlled by one single dominant gene. Biological processes occurred in the fertility restoration of the hybrids were the same based on the pollen and spikelet fertilities of F1 hybrids derived from three CMS and R lines, i.e. 76.1–78.3% and 69.1–76.6%, respectively. A restorer line PK12 had a higher capability in fertility restoration than PK90 and BP11. The SSR primers RM490 and RM258 were capable of identifying the Rf3 and Rf4 genes controlled fertility restoration in CMS-WA. The study supports the use of male sterile WA in rice hybridization.  
PERFORMANCE OF PROMISING HYBRID RICE IN TWO DIFFERENT ELEVATIONS OF IRRIGATED LOWLAND IN INDONESIA Yuni Widyastuti; Satoto Satoto; I.A. Rumanti
AGRIVITA, Journal of Agricultural Science Vol 37, No 2 (2015): JUNE
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v37i2.562

Abstract

The hybrid rice program has been established since early 1990’s at the Indonesia Center for Rice Research (ICRR). Twenty-four experimental hybrid rice varieties which have been developed were tested in lowland rice fields in Sukamandi (West Java) and Batang (Central Java) during the dry season and the rainy season of 2012. Randomized complete block design (RCBD) with three replications was used in each location. The results showed that grains yields were affected by locations, seasons, and genotypes. The genotypes x locations x seasons interaction effect was significant; therefore, the best hybrid was different for each location and season. A7/PK36 hybrid has the best performance in Batang during the dry season, while A7/PK40 and A7/PK32 are the best hybrids in the rainy season. In Sukamandi, nine hybrids were identified as better yielder than that of the check cultivar in the dry season, but not so in the rainy season. Using the correlation and path analysis, we found that the number of panicles per hill and the number of filled grains per panicle could be used as selection criteria for yield in hybrid rice.
PRODUKSI BENIH PADI HIBRIDA: KEMAJUAN, TANTANGAN, DAN PELUANG PENGEMBANGAN DI INDONESIA / Hybrid Rice Seed Production: Progress, Constraints, and Development Opportunities in Indonesia Yuni Widyastuti; R. Noviadi Prabowo; Bayu P. Wibowo; Nita Kartina; Indrastuti A. Rumanti; Nurwulan Agustiani; Indria W. Mulsanti
Jurnal Penelitian dan Pengembangan Pertanian Vol 41, No 1 (2022): Juni, 2022
Publisher : Badan Penelitian dan Pengembangan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jp3.v41n1.2022.p12-20

Abstract

Hybrid seed production is the important key in the commercialization and development of hybrid rice. The successful of hybrid rice development through the exploitation of heterosis phenomenon in China encouraged other countries including Indonesia to develop hybrid rice. Research conducted at Indonesian Center for Rice Research (ICRR) indicated that the development of hybrid rice technology offered opportunities for increasing rice yields by 15-20% compared to inbred varieties. The high cost of hybrid seed is one of the constraints in the adoption of hybrid rice technology. This is primarily attributed to the low hybrid seed yield which is around 1-1.5 t/ha. This article introduces the results of research and development especially in hybrid rice seed production based on genetic of parental lines of hybrid and its field management. The constraints and opportunities of hybrid seed industry in Indonesia also discussed in this article.Keywords: Hybrid rice, seed production, progress, constraint, opportunity. AbstrakProduksi benih merupakan kunci penting dalam keberhasilan komersialisasi dan pengembangan padi hibrida. Keberhasilan Cina mengembangkan padi hibrida dengan memanfaatkan fenomena vigor hibrida (heterosis) telah mendorong negara lain termasuk Indonesia untuk mengembangkannya. Hasil Penelitian di Balai Besar Penelitian Tanaman Padi (BB Padi) menunjukkan penggunaan teknologi padi hibrida memberikan peluang peningkatan hasil 15-20% dibandingkan dengan varietas inbrida. Harga benih yang tinggi menjadi salah satu tantangan dalam adopsi padi hibrida. Hal ini disebabkan oleh produksi benih F1 yang hanya berkisar 1-1,5 t/ha. Artikel ini memaparkan hasil penelitian produksi benih padi hibrida, terutama berdasarkan genetik galur tetua hibrida dan teknis budidaya. Kendala dan peluang industri benih padi hibrida, strategi pengembangan produksi benih dan pembangunan industri benih padi hibrida di Indonesia juga merupakan bagian dari diskusi penting dalam artikel ini.Kata kunci: Padi hibrida, produksi benih, kemajuan, tantangan, pengembangan
Co-Authors Bambang Sapta Purwoko Bayu P. Wibowo I.A. Rumanti Indrastuti A. Rumanti Indria W. Mulsanti Muhamad Yunus Nita Kartina Nurwulan Agustiani R. Noviadi Prabowo Satoto Satoto Satoto Satoto