Molecular DNA


Genetic mapping in polyploids

Promovendus PM (Peter) Bourke PhD
Promotor prof.dr. RGF (Richard) Visser
Copromotor CA (Chris) Maliepaard RE (Roeland) Voorrips
Organisatie Wageningen University, Laboratory of Plant Breeding

vr 15 juni 2018 11:00 tot 12:30

Locatie Auditorium, building number 362
Generaal Foulkesweg 1
6703 BG Wageningen


Many of our most important crop species are polyploid – an unusual phenomenon whereby each chromosome is present in multiple copies (more than the usual two copies). The most common such arrangement is tetraploidy, where each chromosome is present four times. Plant species can tolerate this condition quite well (the same cannot be said of animals or humans). In fact, polyploidy can confer certain advantages such as larger fruits and flowers, seedless fruits (useful for fruit growers) or improved tolerance to environmental stresses. However, carrying multiple copies of each chromosome complicates things, particularly when crop breeders would like to use DNA information to help inform selection decisions. This PhD project looked at how DNA information of polyploids should be best analysed, developing methods and new software tools to achieve this. We analysed DNA information from polyploid crops such as potato, rose and chrysanthemum, yielding many novel insights and important results.