Hasil Padi Dari Empat Kelas Benih Yang Berbeda

There is conflicting informations regarding the advantages of planting of stock seed (SS) over Extension Seed (ES) classes. An experiment to study the effect of different seedclasses on grain yield and yield components of five rice varieties was carried out at two locations i.e. Sukamandi and Muara Field Station during the wet and dry season of 2009. The treatment consisted of five rice varieties, namely: Ciherang, Mekongga, IR64, Cigeulis and Situ Bagendit, and their respective seed classes: namely breeder seed, foundation seed, stock seed and extension seed. The experiment was arranged in a split plot design with three replications, where rice varieties were as main plots and seed classes as sub plots. Variables to be evaluated consisted of: quality of seed before sowing, plant growth, yield components and grain yield. Performance of the observed variable of each rice variety derived from four different seed-classes in each location and planting season were not significantly different. Differences of seed classes only affected the percentage of seed purity. There was no significant difference on the grain yield and the seed yield obtained from different seed classes of each variety. These results disprove the belief that the higher seed class the higher productivity, which was found to be a wrong perception. Seed certification is designed to maintain the genetic purity of variety and not to increase the productivity

Pengujian Ga3 Dan Rasio Tanam Tetua Terhadap Produksi Benih Hibrida Hipa 14 Melalui Rancangan Petak Terbagi

The three lines methods in hybrid rice have disadvantages in seed production procedures that result in low seed yield. Low levels of natural crosses (outcrossing) is one of the causes of low seed yield in hybrid seed production. GA3 application and proper spacing , expected to improve of F1 hybrid seed production. The experimental design used was Split Plot design with three replications. The main plot was doses of GA3 application consist of 0, 200 ppm and 300 ppm. The subplot was row ratios of restores:CMS i,e 2R:8A, 2R:12A; 2R:16A. The material used is parental lines of HIPA 14. The results showed that GA3 application was able to increased plant height of parental lines (CMS and restorer), number of productive tillers, exterted panicle and stigma also outcrossing rate at seed production of HIPA 14. The row ratio was influenced for plant heigh of CMS lines. Interaction between GA3 and row ratio was increased plant height of parental lines, exerted panicle, and outcrossing rat

Identifikasi Galur Tetua Padi Hibrida Dengan Marka SSR Spesifik Dan Pemanfaatannya Dalam Uji Kemurnian Benih

DNA finger printing of hybrid rice variety and their parental lines are important molecular traits as a tool in plant variety protection, DUS test, and seed purity assessment. Molecular markers including microsatellite (SSR) markers have been used in varietal assessment. This study was aimed to identify specific SSR markers that can be used to distinguish parent lines of hybrid rice and to assess seed purity. The experiment was conducted in 2011 at Biology Molecular Laboratory of ICABIOGRAD, Bogor. Sixteen SSR markers were used to identify parental lines of five hybrid varieties of rice. Two hybrid varieties (F1), Hipa 6 and Hipa 7, were used in the seed purity assessment. Seven markers were polymorphic, and six of them (RM206, RM263, RM276, RM346, RM335, RM570) were capable of distinguishing parental lines of the five hybrid varieties. RM 346 marker could be used for testing seed purity of Hipa 6, while RM 206 marker for Hipa 7. Specific SSR marker was capable of distinguishing a false hybrid rice that might not be recognized by the grow out test in the field

Identifikasi Varietas Contoh Untuk Karakter Penciri Spesifik Sebagai Penunjang Harmonisasi Pengujian BUSS Padi

DUS testing (distinctness, uniformity, stability) for a new variety is required for plant variety protection, using International standard method stated on the test guideline. Identification of specific traits needs to be done, in order to obtain stable characters that are valid to be used as standard variety to represent appearance of class-specific characters. This study aims to 1) evaluate specific/asteric characters (*) according to UPOV descriptors; 2) Identify genotypes that can be used as standard varieties for the appearance of specific characters in the process of harmonization of DUS testing among rice producing countries in Southeast Asia. Activities included characterization of 56 genotypes of irrigated and upland rice and were carried out at the Experimental Station of Indonesian Center for Rice Research in Sukamandi, West Java, from September 2011 to January 2012. Observation of plant characters was based on PPU. The result showed that from 43 of class expression of asteric qualitative characters (*), only 28 class expressions were identified in the materials. The characters class expressions are represented by 25 genotypes/varieties. Another eleven more characters asteric (character essential for the harmonization of test results for the PVP), which were not represented by the candidate sample varieties in this study need to identified