Interested Members of the University Community are invited to attend the Final Oral Examination for the Degree of Master of Science of Adam Brown of the Department of Plant Agriculture

DATE: Thursday, December 9, 2021
TIME: 9 am
LOCATION: Room 202, Crop Science Building for those who are students/faculty of the University of Guelph, or on Zoom for those who are unable attend in person.

Join Zoom Meeting: 
https://zoom.us/j/98671915577?pwd=YXQ5Z1BYNmYzVFNhTXdJcWpLNXRJZz09
Meeting ID: 986 7191 5577
Passcode: 527935

Thesis Title: “Identification and evaluation of quantitative trait loci associated with resistance to HG type 2, and seed quality traits from two bi parental mapping populations segregating for soybean cyst nematode resistance”.

Advisory Committee
Dr. Istvan Rajcan   
Dr. Milad Eskandari
Dr. Mary Ruth McDonald

Examination Committee
Dr. François Tardif
Dr. Istvan Rajcan
Dr. Milad Eskandari
Dr. Katerina Jordan                                           

ABSTRACT

Soybean cyst nematode (SCN), Heterodera glycines Ichinohe, is the most economically devastating pathogen of soybean (Glycine max [L.] Merr.) Overuse of the resistance source PI88788 has led to development of new HG types of SCN in the fields. Major genes, Rhg1 and Rhg4, provide resistance to most HG types. The objectives of this thesis were: 1) identify minor QTL contributing to SCN resistance in two recombinant inbred line populations derived from a cross between the susceptible cultivar, Neptune, and resistant LD07-3419 (PI43764-derived), and between resistant cultivar OAC 13-87C-SCN (PI88788-derived) and LD07-3419 (PI43764); 2) assess the relationship between SCN resistance and yield and seed quality. One of the four identified QTL, which is located on chromosome 6 is potentially novel; however, this result needs to be confirmed. SCN resistance was negatively correlated with protein but not with oil concentration or yield. These findings may facilitate breeding for SCN resistance.