|NAVARRO, FELIX - University Of Wisconsin|
|BOWEN, BRYAN - University Of Wisconsin|
|PALTA, JIWAN - University Of Wisconsin|
Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 3/8/2010
Publication Date: 8/2/2010
Citation: Navarro, F.M., Bowen, B.D., Glynn, M.T., Palta, J. 2010. Predictability of Processing Traits Based on Early Years Selection in Potatoes [abstract.] The Potato Association of America. Paper No. 64, p.82-83.
Technical Abstract: Characterization of processing traits in early generation selection provides an important tool to increase genetic gains. Four years ago, we initiated a study in collaboration with the USDA-ARS Potato Research Worksite (PRW), East Grand Forks, MN to screen lines in early years for fry quality and specific gravity. For this purpose about 1000 lines from early years of selection were screened for agronomic performance and disease resistance at Hancock WI and tuber samples were sent to the PRW for fry quality and specific gravity evaluation. In following years these traits were measured again in replicated trials at Hancock WI. These studies provide opportunity to evaluate the efficiency of early selection for fry quality and specific gravity. Chip color scores were evaluated using a Hunter ‘L’ value at East Grand Forks for year 3 lines; visual chip color was rated in year 4-5 using 1-10 scale, where 1 = white uniform chips and 10 = very dark chips for the same breeding lines grown in replicated trials at Hancock and stored for six months at 47 degrees F. Regression analyses show that specific gravity in year 3 lines explained up to 65% of the variation for the same trait in following years. In addition, chip color in year 3 of selection was significantly associated with chip color in following years. Variability of chip color in year 3 lines explained approximately 20% of the variability in following years. Results suggest that specific gravity and fry color can be efficiently predicted in year 3 and used as selection criterion later in following generations.