The Genetic Resources Department (GRD) maintains the PhilRice Genebank, which serves as the national rice germplasm repository. With the advent of the Plant Variety Protection Act, access, exchange and benefit sharing of conserved rice germplasm require legal instruments such as the Standard Material Transfer Agreement (SMTA), which will be introduced to protect the genetic resources of Philippine rice. The purpose of the study is to conserve a source of rice germplasm for medium and long-term storage and to rejuvenate small stocks and low viability of rice germplasm for conservation and distribution.
The data obtained can serve as a basis for planning the regeneration of rice germplasm to obtain sufficient seed stocks. Updating of important rice germplasm data in GEDS coming from various studies and projects in the division. GEDS containing important rice germplasm data was updated: passport data (330 new collections), morpho-agronomic characterization data (545 accessions/accessions), grain quality data (592 collections/accessions), rice tungro field evaluation data (810 collections/accessions) ) , zinc evaluation data (305 collections/accessions), drought evaluation data (102 collections/accessions), and pest and disease data (553 accessions).
Materials are processed and stored at the Seed Processing and Seed Storage Facility at the facility. The use of the traditional and indigenous varieties is of great help in the development of the variety. A total of 1145 rice germplasm materials (618 traditional varieties and 527 breeding lines and other varieties) were inventoried at PhilRice Midsayap (Figure 2).
The importance of a diverse collection of rice germplasm in any breeding program forms the basis of potentially desirable new rice genotypes.
Evaluation of PhilRice Germplasm Collection for Biotic and Abiotic Stresses in Irrigated Lowland and Grain Quality
Evaluation of the PhilRice Germplasm Collection for Irrigated Lowland Biotic and Abiotic Stresses and Wheat Quality. None of the accessions were resistant to BLB, SH and RTV while 63 accessions had intermediate reactions to BLB. Accession number 13817 was identified as blast resistant and had intermediate reactions to BLB and SH.
Thirty-four entries were resistant to BHP, 123 had intermediate reactions and 211 showed susceptible reactions to BHP damage (hopperburn). Summary of Screening Reactions of PhilRice Germplasm Approaches to Major Rice Diseases and Insect Pests in 2016. The purpose of this follow-up study is to generate grain quality data from the PhilRice germplasm collection and efficiently provide grain quality data through a computerized database system managed by the Department for PhilRice Genetic Resources (GRD).
This study aimed to evaluate and screen PhilRice germplasm collections under different intensities of drought stress using line source spray system. Plot biomass of PhilRice germplasm with potential tolerance to drought stress 2014 WS and 2015 DS by rootbox method, 2016 WS. Root system development response of PhilRice germplasm with potential drought stress tolerance 2014 WS and 2015 DS under rootbox.
This study focused on the screening of PhilRice germplasm collection against rice tungro disease. Inoculation of rice blast resistant genotypes (rice blast field resistance) with eight differential isolates from rice blast. Evaluation of the disease response of these rice accessions when inoculated with eight differential rice blast isolates.
Gene estimation based on the response patterns of 25 types of monogenic line harboring 22 R genes to 20 differential isolates from the Philippines (Kobayashi et al. In the first phase of evaluation, we investigated the blast resistance in 60 traditional rice varieties (TRV). against eight ( 8) differential isolates Among these 15 accessions we identified 9 accessions resistant to 17 of the differential isolates.
The broad spectrum resistance index (BSRI) of rice blast resistant genotypes against 8 differential isolates ranges from 0.625 to 1.0. The resistance pattern of a particular TRV to 17 differential isolates that cannot be attributed to any of the 24 major R genes considered in the differential system is assumed to be conferred by an "unknown" R gene/genes.
Genetic Resources Research (GRD 005)
Phenotypic and molecular evaluation of 8 MAGIC founder lines to biotic and abiotic stresses; and grain quality. Landrace Exploration for CMS Diversification (GRD 005-003) IG Pacada, TMM Pascual, C Blazer, R Marzan, E Corpuz, A Bildua and XGI Caguiat. To date, most of the PhilRice maintainer lines converted to male sterile have the WA cytosterility source.
However, a single source of male sterile cytoplasm can be catastrophic in case of sudden outbreak of pests and diseases, specifically if the susceptibility is associated with a CMS-inducing factor. Generate inter subspecific and nucleus substitution crosses and identify potential CMS source based on pollen fertility/. Complete Genomic DNA Sequencing of Selected Philippine Traditional Varieties for In Silico Rediscovery (GRD 005-004).
Genomic DNA sequencing is a biotechnology tool for discovering genes that code for traits including resistance to pests and diseases, tolerance to abiotic stress, grain quality. With the revolution of molecular tools and rapid evolution of DNA analysis technology, it is becoming a common benchmark for gene discovery in plants, especially rice. Philippine traditional rice varieties currently preserved in PhilRice Genebank have enormous genetic diversity and potential new genes for rice genetic improvement.
The discovery of genes and potential source of germplasm in traditional local and native rice varieties will mean opportunities for the commercialization of the progress of rice science in the Philippines. In the Philippines, rice has always been a mainstay in Filipino culture and traditions and agriculture-based research. However, the ethnic attributes of rice, especially those of traditional varieties, remain scarce and unexplored.
This study aims to collect and conserve traditional rice varieties and gather information from local communities about their use of rice in folk medicine. The ethno-directed survey was conducted using semi-structured interviews with knowledgeable locals as our key informants. An ethnobotanical study of traditional races of rice (Oryza sativa L.) used for medicinal treatment in selected local communities of the Philippines.
Optimization of Germplasm Conservation Procedures (GRD 007)
Significant prerequisite for using germplasm for improvement is to accurately identify their ecotypes whether they belong to indica and japonica groups. Among the physiological and morphological characteristics, the grain shape and grain phenol reaction have been widely used as conventional tools to classify rice varieties into Japonica and Indica types.
Conservation of Genetic Resources in the Rice Environment (GRD-008)
As a leader in rice research and development in the Philippines, PhilRice initiated the restoration of the original accessions in 2013 and continues selection and hybridization to develop superior varieties. As PhilRice supports research projects on azolla, it aims to achieve its goal of making biofertilizers a stable part of the rice farming system and making the dream of sustainable agriculture in the Philippines a reality. The conservation and maintenance of 98 accessions consists of newly collected azolla from different parts of the Philippines.
Conservation and Management of Biological Control Assets (GRD-008-002) GF Estoy Jr, BM Tabudlong, JT Niones and XGI Caguiat. Entomopathogenic fungi as biocontrol agents provide alternative pest control measures that reduce rice pest populations below harmful levels. During pest outbreaks, the production of high-quality inoculum of these biocontrol agents (BCAs) is in high demand.
Pure culture of fungal biocontrol agents was isolated and maintained in the laboratory to have a continuous source of the fungus for the efficacy tests conducted in the laboratory. In order to have an effective and economical method of preservation of biological control agent, four (4) preservation techniques of fungal biocontrol agents were tested, namely potato dextrose agar slant, mineral oil, granular form and powder form. Different preservation techniques of the fungal biocontrol agents resulted in a concentration of 108 conidia ml-1 after 3-12 months in the laboratory (Figure 13).
With the growing awareness of the adverse human and environmental effects of the use of inorganic fertilizers, herbicides and pesticides, PhilRice through its R&D programs had long recognized that beneficial microbes offer an alternative strategy to combat soil nutrient limitation and the effects destroyer of weeds and pests. on cultures. Preservation methods of isolates potentially important for agrobiological applications should be optimized early in the development process of a product in order to avoid possible economic and scientific losses in case of deterioration of a production type. Evaluation of persistence and pathogenicity of rice pathogens as well as a biological control agent stored under different storage methods.
Evaluation of the viability, IAA production, ACC deaminase and P solubilizing activity of a plant growth promoting microorganism stored under different preservation methods. In different storage conditions, two strains of Trichoderma sp., one isolate of a plant growth promoting bacterium, Streptomyces mutabilis and 13 isolates of rice bacterial leaf rust pathogen, Xanthomonas oryzae pv. Effect of different storage conditions on the indole-3-acetic acid (IAA) production activity of Streptomyces mutabilis.
Growth and sporulation of isolates are indicative of ACC utilization and ACC deaminase production. Effect of different storage conditions on 1-aminocyclopropane-1-carboxylate (ACC) deaminase activity of Streptomyces mutabilis.
