Professor, Institute of Biological Sciences
University of the Philippines Los Baños

Maria Genaleen Q. Diaz is a Professor at the Institute of Biological Sciences, University of the Philippines Los Baños. Her field of specialization is Genetics and Molecular Biology. She had done genetic researches on the more classical fields of genetics such as cytogenetics to the more modern fields such as genomics/transcriptomics. Her researches include understanding the existing genetic diversity in some populations and DNA barcoding. She had also been involved in a number of researches on rice QTLs associated with tolerance to abiotic stresses. At present, she is conducting transcriptomic studies via RNA-Seq, particularly on important Philippine crops such as coconut, abaca, and saba banana. A lot of her researches have the ultimately goal of helping plant breeders in their continuous efforts to genetically improve crop plants.


Bulasag, A.S., N.T. del Agua, A.S. Punongbayan and M.G.Q. Diaz. 2015. Short Communication: Development of microsatellite markers for genetic diversity analysis in Glossogobius giuris (Hamilton, 1822) and Rhinogobius giurinus (Rutter, 1897). International Journal of Philippine Science and Technology 8(2):19-23.

Jalani, G. S. P., R.P. Laude, M.G.Q. Diaz, C. dR. Medina and L. R. I. Velasco. 2014 Genetic diversity of natural populations of Bactrocera occipitalis (Bezzi) and B. philippinensis Drew and Hancock (Diptera: Tephritidae) in selected mango producing areas in the Philippines using microsatellites. Agrivita 36(3):217-228.

Mohammadi, R., M.S. Mendioro, G. Q. Diaz, G. B. Gregorio and R. K. Singh. 2014. Genetic analysis of salt tolerance at seedling and reproductive stages in rice (Oryza sativa). Plant Breeding 133(5):548–559.

Mohammadi, R., M.S. Mendioro, G.Q. Diaz, G.B. Gregorio, and R.K. Singh. 2013. Mapping quantitative trait loci associated with yield and yield components under reproductive stage salinity stress in rice (Oryza sativa L.). Journal of Genetics 92(3):433-443.

Delomen, M.L.C., M.S. Mendioro and M.G.Q. Diaz. 2013. Morphometric analysis and DNA barcoding of fruit flies Bactrocera occipitalis (Bezzi) and B. philippinensis Drew and Hancock (Diptera:Tephritidae) from Cavite and Davao del Norte. Phil. J. of Science 142(1):69-76.

Dela Cruz, R.Y, R.P. Laude, M.G.Q. Diaz, A.C. Laurena, M.S. Mendioro and E.M.T. Mendoza. 2013. Polymerase chain reaction (PCR)-based cloning of partial cDNAs of selected genes in normal and mutant ‘makapuno’ endosperms of coconut (Cocos nucifera L.). Philipp. Agric. Scientist 96(1):60-71.

Maranan, F.S. and M.G.Q. Diaz. 2013. Research Note: Molecular diversity and DNA barcode identification of selected Philippine endemic Hoya species (Apocynaceae). Philipp. Agric. Scientist 96(1):92-98.

Ye, C., M.A. Argayoso, E.D. Redoña, S.N. Sierra, M.A. Laza, C.J. Dilla, Y. Mo, M.J. Thomson, J. Chin, C.B. Dela Viña, G.Q. Diaz and J.E. Hernandez. 2012. Mapping QTL for heat tolerance at flowering stage in rice using SNP markers. Plant Breeding 131(1):33-41.

Siar S.V., J.A. Dalu, C.D. Roldan, M.C. Redondo, M.G.Q. Diaz and J.M Carandang. 2011. Research Note: Chromosomal characteristics and behavior of four Philippine endemic Hoyas: Hoya crassicaulis Elmer ex Kloppenburg, H. merrillii Schlechter, H. mcgregorii Schlechter and H. pubicalyx Merrill. Philippine Journal of Crop Science 36(3): 65-69.

Dela Cruz, R.Y., R.P. Laude, M.G.Q. Diaz, A.C. Laurena, M.S. Mendioro and E.M.T. Mendoza. 2011. Gene for actin is a suitable internal reference for relative RT-PCR based expression analysis in nomral and mutant makapuno endosperms of coconut (Cocos nucifera L.) Philipp. Agric. Scientist 94(2): 118-123.

Lantican, N.B., M.G.Q. Diaz, J.J.L. Cantera, F.L. de los Reyes III and A.K. Raymundo. 2011. Microbial community of a volcanic mudspring in the Philippines as revealed by 16S rDNA sequence analysis and fluorescence in situ hybridization. World J Microbiol Biotechnol. 27: 859-867.
Lang, J.M., J.P. Hamilton, M.G.Q. Diaz, M.A.V. Van Sluys, M.R.G. Burgos, C.M. Vera Cruz, C.R. Buell, N.A. Tisserat, and J.E. Leach. 2010. Genomics-based diagnostic marker development for Xanthomonas oryzae pv. oryzae and X. oryzae pv.oryzicola. Plant Disease 94(3): 311-319.

Bruce, M., A. Hess, J. Bai, R. Mauleon, M.G. Diaz, N. Sugiyama, A. Bordeos, GL Wang, H. Leung, and J.E. Leach. 2009. Detection of genomic deletions in rice using oligonucleotide microarrays. BMC Genomics 10:129 (25 March 2009).

Mendioro, M.S, M.G.Q. Diaz, V.M.E. Velasco, M.C. Alcaraz, R.C. Lalamunan, K.G. Amoloza, and L.N. Villamael. 2008. Genetic characterization of pili (Canarium ovatum Engl.) from Albay, Camarines Norte and Camarines Sur through isozyme analysis. Phil. J. of Science 137(2): 115-125.

Diaz, M.G.Q., M. Ryba, R. Nelson, H. Leung and J.E. Leach. 2007. Detection of deletion mutants in rice via overgo hybridization onto nylon membrane spotted array. Plant Molecular Biology Reporter 25(1-2): 17-26.

Nas, T.M.S., D.L. Sanchez, M.G.Q.Diaz, M.S. Mendioro and S.S. Virmani. 2005. Pyramiding of thermosensitive genetic male sterility (TGMS) genes and identification of a candidate tms5 gene in rice. Euphytica 145:67-75.

Diaz, M.G.Q., M.J.R. Revilleza, E.M.T. Mendoza and D.A. Ramirez. 2005. Research Note: Identification and characterization of cDNA encoding the enolase gene from coconut (Cocos nucifera L.) endosperm. Phillip. Agric. Scientist 88(3): 366-372.

Mendioro, M.S., M.G.Q Diaz, M.T. Alcantara, O. Hilario, P.C. Mateo and R.D.M. Maghirang. 2005. Cytological studies of selected medicinal plants: Euphorbia pulcherrima Willd. Ex Klotz, Moringa oleifera Lam., Catharanthus roseus(L.)Don and Chrysanthemum indicum Linn. Phil. J. of Science 134(1).

Diaz, M.G.Q. and D.A. Ramirez. 1994. Cytogenetics of sponge gourd, Luffa cylindrica, ridged gourd, Luffa acutangula, their F1 hybrid, F2 and BC1 progenies. Phil. Agric. 77(3): 347-358.

Diaz, M.G.Q. and L.M. Engle. 1989. Research Note: Locating Meiotic Cells in the microsporocarps of Azolla. Phil. Agric. 72(3): 339-346.