Scientist Profile

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Glenn B. Gregorio

Genetics, Outsatnding Young Scientist (2004)

Expertise: Genetics, Biotechnology, Crop Improvement, Agriculture

Dr. Glenn B. Gregorio is recognized for important of his significant works in the field of Genetics specifically by leading the innovative efforts in the use of rice to boost micronutrient intake among the poor by developing rice varieties with enhanced iron and zinc in the grain. Consumption of these varieties will help reduce anemia among peoples whose staple is rice. He is also credited for the use of biotechnology, especially molecular marker techniques, in rice improvement for tolerance to adverse soil conditions. He has been training and supervising students and research fellows in the Philippines and developing countries on the newly emerging technologies for crop improvements.

Affiliation

Scientist, International Rice Research Institute, Los Baños, Laguna

International Research Fellow (Plant Breeder), Plant Breeding, Genetics and Biochemistry Division IRRI, College, Laguna

Association

    • Philippine Society for the Advancement of Genetics (PhiSAGen), President
    • Crop Science Society of the Philippines, President
    • Crop Science Society of America (CSSA), Member
    • University of the Philippines Los Baños Genetics Society (GENESOC), Member
    • International Soil Science Society (ISSS), Member
    • Society for the Advancement of Breeding Researches in Asia and Oceana, Member

Employment

    • IRRI, Affiliate Scientist (Plant Breeder), 2000-2003
    • UPLB Graduate School (Genetics and Agronomy Department, Adjunct Associate/Assistant Professor, 1999-present
    • IRRI, Project Scientist and Interim Plant Breeder, 1998-1999
    • FAO/IAEA Program, Consultant to Plant Breeding Unit, 1998-2000
    • IRRI, Project Scientist/Post Doc., 1998
    • NIAB/IAEA, Expert Mission to NIAB/IAEA, 1997
    • FAO/IAEA Program Agency's Laboratory, Consultant, 1997
    • IRRI, Consultant to Rice Micronutrient Project, 1997 My-D
    • IRRI, Senior Research Assistant, 1994-1997
    • IRRI, Research Assistant, 1991-1994
    • IRRI, Research Aide, 1986-1991

Award

    • Outstanding Young Scientist Award (Genetics), NAST, 2004
    • Ten Outstanding Young Scientists of the Philippines (TOYS), NAST, 1980
    • Scholarship Award, Del Monte Philippines, Inc., 1982-1986
    • Scholarship Award, Engineering Science Education, DOST, 1995-1997
    • Special Achievement Award, IRRI Filipino Scientist Association, 1999
    • Honorary Foreign Scientist of the Rural Development Administration (RDA) Award of Korea, Korea, 2002-2005

Research

    • Genetic components of salinity tolerance in rice (Oryza sativa) L. [Completed]
    • AFLP mapping of salinity tilerance genes in a recombinant inbred indica rice population [Completed]
    • Isolation and allelic analysis of the gene encoding high-affinity sodium/potassium symporter hkt 1 of rice (Oryza sativaL.) [Completed]
    • Determination of photoperiod sensitivity in F2 and F3 rice populations using molecular markers. [Completed]
    • Genetic variabiltiy in micronutrient concentration in rice grain [Completed]
    • Genetic component analysis of mineral loading in the rice grain [Completed]
    • Genetics/mapping Fe-toxicity tolerance genes [Completed]
    • The development of salt tolerant rice varieties by shuttle breeding involving pyramiding of genes specific to physiological traits. [Completed]
    • Mapping salinity tolerance genes in japonica rice in collaboration with the Agricultural research Center in Egypt and the US. [Comleted]
    • Development of high yielding salinity tolerant varieties for the coastal wetlands of bangladesh. [Completed]
    • Breeding of micronutirent dense rice to reduce anemia in Asia [Completed]
    • QTL mapping of phosphorus-deficiency tolerance in rice. [Completed]

Papers Presented

    • Iron Toxicity Tolerance Screening in Rice, International Genetics Symposium (IRGS), IRRI, Manila, Philippines
    • Performing Line x Tester Analysis with the SAS System, International Genetics Symposium (IRGS), IRRI Manila, Philippines
    • Challenges and Opportunities in Breeding for Salinity Tolerance in Rice, Workshop on Soil Salinity in Rice
    • Rapid Screening for Salinity Tolerance in Rice, 2nd Asian Crop Science Conference, Fuku, Japan
    • Deletion Mutants For Functional Genomics: Progress in Phenotyping, Sequence Assignment, and Database Development, 4th International Rice Genetics Symposium (IRGS), IRRI, Philippines
    • Development of High Yielding Salt Tolerant Rice Varieties, International Symposium on Strategies for Utilizing Salt-affected Lands
    • Chapter 18. Application of PCR-DGGE to Examine the Microbial Community Associated with the Rhizosphere of Rice as Affected By Salinity, 3rd Asian Conference on Plant Growth-Promoting Rhizobacteria (PGPR) and Other Microbials, Hyatt Hotel, Manila, Philippines

Education

    • University of the Philippines at Los Ba?os, College, Laguna, PhD in Genetics (Minor in Statistics), 1997
    • UPLB, College, Laguna, M.Sc. in Plant Breeding (Minor in Soil Science), 1991
    • UPLB, College, Laguna, B.S. Agriculture (Major in Agronomy), 1986

Publication

    • Gregorio, G.B. Alcordo, I.V. Jr., (1981) Development of a pyramidal solar drier for agricultural products.
    • CMU Journal of Agriculture, Food and Nutrition Volume 2;, No. 156-167
    • Gregorio, G.B., Senadhira D., (1982) Development of high yielding salt tolerant rice varieties
    • Proc., International Symposium on Strategies for Utilizing Salt-affected Lands
    • Gregorio, G.B. Sinadhira, D., (1993) Genetic analysis of salinity tolerance in rice (Oryza sativa L.).
    • Theor. Applied Genetics Volume 86
    • Chaubey, C.N. Senadhira, D. Gregorio, G.B., (1994) Genetic analysis of tolerance for phosphorus deficiency in rice.
    • Theor. Applied Genetics Volume 89
    • Senadhira, D. Zapata, F.J. Datta, S.K. Gregorio, G.B. et al., (1995) Anther culture-derived rice: Salt tolerant improved rice variety for the Philippines
    • Federal of Crop Science Society of the Philippines for Best Paper
    • Gregorio, G.B., Senadhira, D., (1995) Rapid screening for salinity tolerance in rice
    • Proc., 2nd Asian Crop Science Conference, Fuku, Japan
    • Senadhira, D. Gregorio, G.B. Roxas, J.P. Mendoza, R.T., (1996) Challenges and opportunities in breeding for salinity tlerance in rice.
    • Proc., Workshop on Soil Salinity in Rice.
    • Lee, .S. Senadhira, D. Gregorio, G.B., (1996) Genetics of salinity tolerance in japonica rice.
    • SABRAO Volume 28
    • Cho, Y.C., Gregorio, G.B., Kang, K.H., Ahn, S.N., Moon , H.P., (1997) Classification and genetic diversity of 48 commercial varieties in rice (Oryza sativa) based on amplified fragment length polymorphism (AFLP)
    • Korean Journal of Plant Breeding Volume 29 (Supp)
    • Cho, Y.C. Gregorio, G.B. Kang, K.H. Ahn, S.N. Brar, D.S. Moon, H.P., (1997) Fingerprinting of Korean commercial japonica rice cultivars based on AFLP analysis
    • RGN Volume 14
    • Gergorio, G.B., Senahidra, D., Graham, R.D., Htut, T., (1999) Improving iron and zinc value of rice for human nutrition
    • Agriculture et Development Volume 23
    • Gregorio, G.B. Senahidra, D. Htut, T. Graham, R.D., (2000) Breeding for trace mineral density in rice.
    • Food and Nutrition Bulletin Volume 21
    • Welch, R.M. House, W.A. Beebe, S. Senadhira, D. Gregorio, G.B. Cheng, Z., (2000) Testing iron and zinc bioavailability in genetically enriched beans (Phaseolus vulgarisL.) and rice (Oryza sativa L.) in a rat model.
    • Food and Nutrition Bulletin Volume 21
    • Lee, K.S. Choi, W.Y. Kim, T.S. Gregorio, G.B., (2003) Salinity tolerance of japonica and indica rice (Oryza sativa L.) at seedling stage.
    • Planta Volume 216
    • Zeng, L., Poss, J.A., Wilson, C., Draz, A.E. Grgorio, G.B., (2003) Evaluation of salt tolerance in rice genotypes by psychological characters
    • Euphytica Volume 129
    • Graham, R.D., Gregorio, G.B., () Breeding for nutritional characteristics in cereals
    • Rice Biotechnology: Improving Yields, Stress Tolerance and Grain Quality Wiley Chichester (Novartis Foundatio)
    • Graham, R.D., Gregorio, G.B., (2001) Breeding for nutritional characteristics in cereals
    • Rice Biotechnology: Improving Yield, Stress Tolerance and Grain Quality, Wiley, Chichester (Novartis Foundation)
    • Bonilla, P., Dvorak, J., Mackill, D.J., Deal, K., Gregorio, G.B., (2002) RFLP and SSLP mapping of salinity tolerance genes in chromosome 1 of rice (Oryza sativa L.) using recombinant inbred lines
    • Philippine Agricultural Scientist Volume 85
    • Gregorio, G.B., Senadhira, D., Mendoza, R.D., Manigbas, N.L., Roxas, J.P., Guerta, C.Q., (2002) Progress in breeding for salinity tolerance and related abiotic stresses in rice
    • Field Crop Research Journal Volume 76
    • Senahidra, D., Zapata-Arias, F.J., Gregorio, G.B., Alejar, M.S., de la Cruz, H., Padolina, T.F., Galvez, A.M., (2002) Development of the first salt tolerant rice variety through indica/indica anther culture
    • Field Crop Research Journal Volume 76
    • Glahn, R.P., Cheng, Z., Welch, R.M., Gregorio, G.B., (2002) Comparison of iron bioavailability from 15 rice genotypes: studies using an vitro digestion /caco-2 cell culture model
    • Journal of Agricultural and Food Chemistry Volume 50, No. 12
    • Gregorio, G.B., (2002) Progress in breeding for trace minerals in staple crops.
    • Journal of Nutrition Volume 132
    • Gregorio GB, (2003) IRRI Breeding Approaches for Improving the Nutritional Value of Rice, In: Impact of Agriculture on Human Health and Nutrition
    • Encyclopedia of Life Support Systems. UNESCO
    • Gregorio, G.B., Cabuslay, G., (2003) Recent Developments in Abiotic Stress Tolerance Breeding in Rice
    • In Abiotic Stresses:Plant Resistance Through Breeding and Molecular Approaches, (M. Ashraf and P.J.C. Harris, Eds.)
    • Moradi, F., Egdane, J., Gregorio, G.B., (2003) Salinity Tolerance of Rice Cultivars During Reproductive Development
    • Association with Tolerance at Seedling Stage Indian Journal of Plant Physiology
    • Gregorio, G.B., (1999) Genetics components of salinity tolerance in rice (Oryza Sativa L.)
    • MS Thesis, University of the Philippines Los Ba?os, Philippines
    • Sison, M.E.Q., Gregorio, G.B., Mendioro, M.S., (2006) The effect of different milling times on grain iron content and grain physical parameters associated with milling of eight genotypes of rice (Oryza sativa L.)
    • The Philippine Journal of Science Volume 135, No. 1
    • Gregorio, G.B., Quimio, C.A, (2009) Kinetics of Iron in the Development of Rapid Screening Technique for Iron Toxicity Tolerance in Rice
    • Transactions of the National Academy of Science and Technology. Abstracts of Papers Volume 31, No. 1
    • Organo, N.D., Paterno, E.S., Delfin, E.F., Gregorio, G.B., Lantican, N.B., & Simbahan, J.F., (2013) Chapter 18. Application of PCR-DGGE to Examine the Microbial Community Associated with the Rhizosphere of Rice as Affected By Salinity
    • Proceedings of the 3rd Asian Conference on Plant Growth-Promoting Rhizobacteria (PGPR) and Other Microbials, Hyatt Hotel, Manila, Philippines
    • Leung, H., Wu, C., Baraoidan, M., Bordeos, A., Ramos, M., Madamba, S., Cabauatan, P., Vera Cruz, C., Portugal, A., Reyes, G., Brusskiewich, R., McLaren, G., Lafitte, H.R., Gregorio, G.B., Bennett, J., Brar, D., Khush, G.S., Schnable, P., Wang, G.-L., & Leach, J., (2001) Deletion mutants for functional genomics: Progress in phenotyping, sequence assignment, and database development
    • Proceedings of the Fourth International Rice Genetics Symposium, Los Baños, Laguna, Philippines
    • Leung, H., Wu, C., Baraoidan, M., Bordeos, A., Ramos, M., Madamba, S., Cabauatan, P., Vera Cruz, C., Portugal, A., Reyes, G., Brusskiewich, R., McLaren, G., Lafitte, H.R., Gregorio, G.B., Bennett, J., Brar, D., Khush, G.S., Schnable, P., Wang, G.-L., & Leach, J., (2001) Deletion mutants for functional genomics: Progress in phenotyping, sequence assignment, and database development
    • Proceedings of the Fourth International Rice Genetics Symposium, Los Baños, Laguna, Philippines

Trainings

    • International Symposium on Strategies for Utilizing Salt-Affected Lands, 1992 F 17-25, Central Plaza Hotel, Bangkok, Thailand
    • Experimental Biology 01 Meeting, 2001 Mr 31-Ap 4, Orlando Convention Center, Orlando Florida, USA
    • International Post-Graduate Course on Application of Water-Saving Irrigation Technology and Manageme, 1992 Je-Jl, Bengurion University of the Negev, Sede Boger, Israel
    • Senior Lecturer at an International Workshop on: A Practical Course-, 1998 F 16-27, National Institutefor Biotechnology and Genetic Engineering (NIBGE Faislabad,Pakistan
    • Organizer and Senior Lecturer during the Practical Course-, 2001 N 4-13, Dhaka University, Bangladesh
    • Chair the Organizing Committee for the 6th National Genetics Symposium, 2000 D 5-8, DA-PhilRice Batac, Ilocos Norte
    • Coordinator and Lecturer on Rice Breeding for Better Nutrition Workshop, 2003 Ap 7-11, Los Banos, Laguna, Philippines
    • Organizer and Faculty of the International Course on: Novel Genetic Markers for Crop Improvement, 2001N 4-14, Dhaka University, Bangladesh
    • Consultant, IRRI-Bhutan Project, National Rice Production in the 9th five-year Plan, 2001 Ag 19-26, Bhutan, India
    • Supervised the Completed two M. S. theses on (1) Gene Mapping of Zinc Deficiency Tolerance and High
    • Supervise two Ph.D. Scholar and MSc. from Bangladesh, and One M.Sc. Scholar from the Philippines, Bangladesh and Philippines
    • Supervised one Post Doc. in the Study of Micronutrient Loading in the Grain, 2001-2003