Staff Members with ACPFG

Okada, Takashi
PositionGroup leader of wheat floral architecture project
Phone+61 8 8313 7180
Research Interests

Takashi has expertise in plant molecular biology and reproductive development.  He has been working in the area of sexual plant reproduction using various plant species since his honours, and studied both male and female gametophyte development to understand the pollination and fertilization process in plants.  His current project focuses on developmental and genetic basis of floral development and flowering process in cereals.


Takashi completed his PhD in 2000 at the Tohoku University (Japan) for his study on immunological and biological characterization of Brassica pollen allergen.  Then, he worked as a post-doctoral fellow at University of Melbourne for transcriptome analysis of male gamete in lily and Arabidopsis (2000 – 04).  He also worked as a senior post-doctoral fellow in CSIRO Plant Industry for apomixis project (2005 – 12).  Since he joined ACPFG October 2012, he has been working on fertility control and floral architecture of wheat for hybrid seed production.  He is now the group leader of wheat floral architecture project.


Nguyen V, Fleury D, Timmins A, Laga H, Hayden M, Mather D, Okada T (2015) Addition of rye chromosome 4R to wheat increases anther length and pollen grain number. Theoretical and Applied Genetics 128:953-64. Link

Shirasawa K, Hand ML, Henderson ST, Okada T, Johnson SD, Taylor JM, Spriggs A, Siddons H, Hirakawa H, Isobe S, Tabata S, Koltunow AM (2015) A reference genetic linkage map of apomictic Hieracium species based on expressed markers derived from developing ovule transcripts. Annals of botany 115:567-80 Link

Kotani Y, Henderson S, Suzuki G, Johnson SD, Okada T, Siddons H, Mukai Y, Koltunow AM (2014) The LOSS OF APOMEIOSIS (LOA) locus in Hieracium praealtum can function independently of the associated large-scale repetitive chromosomal structure. New Phytologist 201:973-981 Link

Whitford R, Fleury D, Reif JC, Garcia M, Okada T,  Korzun V, Langridge P (2013) Hybrid Breeding in Wheat: Technologies to improve hybrid wheat seed production. (Darwin Review) Journal of Experimental Botany 64:5411-28 Link

Okada T, Hu Y, Tucker MR, Taylor JM, Johnson SD, Spriggs A, Tsuchiya T, Oelkers K, Rodrigues JC, Koltunow AM (2013) Enlarging cells initiating apomixis in Hieraciumpraealtum transition to an embryo sac program prior to entering mitosis. Plant Physiology 163: 216-231 Link

Tucker MR, Okada T, Hu Y, Scholefield A, Taylor JM, Koltunow AMG (2012) Somatic small RNA pathways promote the mitotic events of megagametogenesis during female reproductive development in Arabidopsis. Development 139: 1399-1404 Link

Tucker MR, Okada T, Johnson SD, Takaiwa F, Koltunow AMG (2012) Sporophytic ovule tissues modulate the initiation and progression of apomixis in HieraciumJournal of Experimental Botany 63: 3229-3241 Link

Okada T, Ito K, Johnson SD, Oelkers K, Suzuki G, Houben A, Mukai Y, Koltunow AM (2011) Chromosomes carrying meiotic avoidance loci in three apomictic eudicotHieracium subgenus Pilosella species share structural features with two monocot apomictsPlant Physiology 157: 1327-1341 Link

Koltunow AMG, Johnson SD, Rodrigues JCM, Okada T, Hu Y, Tsuchiya T, Wilson S, Fletcher P, Ito K, Suzuki G, Mukai Y, Fehrer J, Bicknell RA (2011) Sexual reproduction is the default mode in apomictic Hieracium subgenus Pilosella, in which two dominant loci function to enable apomixis. Plant Journal 66: 890-902 Link

Okada T, Catanach AS, Johnson SD, Bicknell RA, Koltunow AM (2007) An Hieraciummutant, loss of apomeiosis 1 (loa1) is defective in the initiation of apomixis. Sexual Plant Reproduction 20: 199-211 Link

Okada T, Singh MB, Bhalla PL (2007) Transcriptome profiling of Lilium longiflorumgenerative cells by cDNA microarray. Plant Cell Reports 26: 1045-1052 Link

Okada T, Bhalla PL, Singh MB (2006) Expressed sequence tag analysis of Lilium longiflorum generative cellsPlant and Cell Physiology 47: 698-705 Link

Okada T, Singh MB, Bhalla PL (2006) Histone H3 variants in male gametic cells of lily and H3 methylation in mature pollen. Plant Molecular Biology 62: 503-512 Link

Okada T, Endo M, Singh MB, Bhalla PL (2005) Analysis of the histone H3 gene family in Arabidopsis and identification of the male-gamete-specific variant AtMGH3. Plant Journal 44: 557-568 Link

Okada T, Bhalla PL, Singh MB (2005) Transcriptional activity of male gamete-specific histone gcH3 promoter in sperm cells of Lilium longiflorumPlant and Cell Physiology 46: 797-802 Link

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