Managing Global Resources for a Secure Future

2017 Annual Meeting | Oct. 22-25 | Tampa, FL

333-1 A High-Throughput Characterization of Freezing Tolerance in Vicia Villosa for Northern Adaptation.

See more from this Division: C01 Crop Breeding and Genetics
See more from this Session: Crop Breeding & Genetics Oral III : Focus on Phenotyping

Wednesday, October 25, 2017: 8:05 AM
Marriott Tampa Waterside, Florida Salon VI

Nicholas Wiering, MN - Minnesota, University of Minnesota, St. Paul, MN, Garett Heineck, Horticultural Science, University of Minnesota, Saint Paul, MN, Claire Flavin, University of Minnesota, St. Paul, MN, Craig C. Sheaffer, Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, MN and Nancy Jo Ehlke, 1991 Upper Buford Circle, University of Minnesota, St. Paul, MN
Abstract:
Vicia villosa, commonly referred to as hairy vetch, is a winter-annual legume that is increasingly gaining popularity as a cover-crop given the potential N contribution and accompanying ecosystem services. Although it is often cited as one of the most winter-hardy annual legume species available, successful overwintering is not guaranteed in northern temperate growing regions. Winter-hardiness is a complex trait that can require several years to accurately phenotype, given the uncontrollable nature of winter pressure and field variability. Muddling the scenario further, is a lack of defined varieties commercially available for the species. With the exception of some released varieties with southern adaptation, most available germplasm is designated as variety-not-stated. To efficiently characterize unstudied populations of V. villosa, we developed a method of controlled freezing in artificial conditions by testing a subset of accessions with known winter-hardiness from a multi-year evaluation across Minnesota locations. We found duration of cold acclimation and growth stage at the time of freezing to both significantly affect plant survival following freezing treatments. A single treatment, which was most reflective of field evaluations, was then applied to a larger germplasm set. Our results suggest that freezing tolerance in a controlled environment correlates highly with winter-hardiness from field evaluations and could therefore be utilized for phenotypic selection. The derived methodology offers an intuitive, low-cost, time-efficient, and controlled method for assessing the winter-hardiness potential of populations of V. villosa.

See more from this Division: C01 Crop Breeding and Genetics
See more from this Session: Crop Breeding & Genetics Oral III : Focus on Phenotyping

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