Dr Adre Minnaar-Ontong
Senior Lecturer
Plant Sciences
Plant Sciences
IB 63
051 4019100
Agriculture Building: Block 4 4.105

Short CV

Adré Minnaar-Ontong started her tertiary career at the University of the Free State in 1996, where she obtained the degrees: B.Sc. (Genetics en Biochemistry), B.Sc. Hons. (Genetics), MSc in Genetics and Ph.D (Plant Breeding/ Plant Pathology). 

Her Ph.D was based on the Population dynamics of Fusarium head blight causing species in South Africa. With this study she contributed towards the resistance breeding against Fusarium head blight in South Africa. The knowledge gained might assist with the development of effective control strategies against FHB in South Africa.

Adré started her career as research assistant in 2004 in the Department of Plant Sciences (Plant Pathology) at the University of the Free State. In 2009 she was appointed as lecturer in the Department of Plant Sciences (Plant Breeding) at the University of the Free State. 

Publications (Short List)

J.J. Spies, J.L. Du Preez, A. Minnaar and R. Kleynhans. 2000. Chromosome studies on African plants 13. Lachenalia mutabilis, L. pustulata and L. unicolor. Bothalia 30,1

L.C. van Jaarsveld, W.-M. Kriel and A. Minnaar. 2006. First report of Puccinia thaliae on Canna lily in South Africa. Plant Dis. 90:113.

SPIES JJ, Spies P, Minnaar A, Reinecke SMC, Du Preez JL and Kleynhans R. 2009. Lachenalia. In: Marhold, K. (ed.), IAPT/IOPB chromosome data 8. Taxon 58: 1282-1283.


Phillipou OA, Swart WJ, Minnaar-Ontong A and Van Biljon. 2013. First report of Fusarium oxysporum causing wilt on Hoodia gordonii in South Africa. Plant Disease 97:1.


Minnaar-Ontong, A., Herselman, L., Kriel, W-M., Leslie, J.F. 2016. Morphological characterization and trichothecene genotype analysis of a Fusarium Head Blight population in South Africa. European Journal of Plant Pathology 148:261-269.


Mutimaamba, C., MacRobert, J., Cairns, J.E., Magorokosho C.E., Ndhlela, T., Mukungurutse, C., Minnaar-Ontong, A., Labuschagne, M.T. 2017. Diallel analysis of acid soil tolerant and susceptible maize inbred lines for grain yield under acid and non-acid soil conditions. Euphytica 213:88


Dari, S., MacRobert, J., Minnaar-Ontong, A., Labuschagne M.T. 2017. Effect of the few-branched-1 (Fbr1) tassel mutation on performance of maize inbred lines and hybrids evaluated under stress and optimum environments. Maydica 62-2017 (electronic publication)




Her research focus on the genetic variation of Sclerotinia sclerotiorum populations on different hosts in South Africa continues.

Further research also includes the genetic analysis of soybean resistance to Fusarium virguliforme. This project aims to evaluate commercial soybean cultivars for resistance and to improve management strategies for disease control.

Breeding for resistance to pod dehiscence in a vegetable-type soybean (in collaboration with the Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences)


Area(s) of Interest

Molecular Biotechnology (DNA fingerprinting and DNA sequencing) 

Slerotinia diseases


Courses Presented

PLTB 2613

PLTB 3744

PLTB 4806


PLTB 6806

PLTB 6808

PLTB 8900

PLTB 9100



Elfrieda van den Berg (Marketing Manager)
T: +27 51 401 2531


Dilahlwane Mohono (Faculty Officer)
T: +27 58 718 5284

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