Glenn B. Gregorio

Dr. Glenn B. Gregorio is recognized for 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.

Sex: Male

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

Field of Specialization:

Genetics, Biotechnology, Crop Improvement, Agriculture

Researches:

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

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, 2^nd Asian Crop Science Conference, Fuku, Japan
Deletion Mutants For Functional Genomics: Progress in Phenotyping, Sequence Assignment, and Database Development, 4^th 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, 3^rd Asian Conference on Plant Growth-Promoting Rhizobacteria (PGPR) and Other Microbials, Hyatt Hotel, Manila, Philippines

Awards:

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