Breeding for Improved Drought Tolerance in Red Clover (Trifolium pratense L.)

dc.contributor.advisorBowley, Stephen R.
dc.contributor.authorBoucher, Karrie of Plant Agricultureen_US of Guelphen_US of Scienceen_US Agricultureen_US
dc.description.abstractFour red clover (Trifolium pratense L.) and two Medicago truncatula L. varieties were compared for their response to a two-week drought stress at three, five, and seven weeks of age in a controlled environment. The clovers had greater (P<0.05) combined crown and root biomass, and shoot biomass compared to the medics at 80, 30, and 15% field capacity (FC). Combined crown and root weights of the medics did not change as moisture stress increased, whereas the red clover crown and root weights declined. For both species, shoot weight decreased as moisture stress increased. Three cycles of recurrent selection at 30% FC soil moisture were conducted within three populations of red clover. Evaluation of the selection cycles at 15 and 30% FC revealed there was increased combined crown and root weight in one population and increased shoot weight in two of the populations. However, this biomass increase was also detected in non-stress conditions (80% FC). Selection for plant vigour under reduced soil moisture conditions resulted in improved growth in both moisture limited and non-limiting conditions.en_US
dc.description.sponsorshipGrain Farmers of Ontario
dc.description.sponsorshipOntario Ministry of Agriculture, Food and Rural Affairs
dc.publisherUniversity of Guelphen_US
dc.rights.licenseAll items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated.
dc.subjectred cloveren_US
dc.subjectrecurrent selectionen_US
dc.subjectsingle cuten_US
dc.subjectdouble cuten_US
dc.subjecttrifolium pratenseen_US
dc.titleBreeding for Improved Drought Tolerance in Red Clover (Trifolium pratense L.)en_US


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Karrie Boucher's Master's Thesis