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Title: Early generation selection results from a two year, six location study

item Haynes, Kathleen
item HUTCHINSON, C - University Of Florida
item GERGELA, D - University Of Florida
item YENCHO, G - North Carolina State University
item CLOUGH, M - North Carolina State University
item HENNINGER, M - Rutgers University
item HALSETH, D - Cornell University
item SANSTED - Cornell University
item PORTER, G - University Of Maine
item OCAYA, P - University Of Maine

Submitted to: American Journal of Potato Research
Publication Type: Abstract Only
Publication Acceptance Date: 1/14/2010
Publication Date: 2/1/2011
Citation: Haynes, K.G., Hutchinson, C.M., Gergela, D., Yencho, G.C., Clough, M.E., Henninger, M.R., Halseth, D.E., Sansted, Porter, G.A., Ocaya, P.C. 2011. Early generation selection results from a two year, six location study. American Journal of Potato Research. 88:43.

Interpretive Summary:

Technical Abstract: In potato breeding programs, early generation selections are rarely evaluated in multiple environments because of limited seed quantities. By the time seed quantities are available, few clones remain from the original population. The purpose of this study was to allow multiple locations to select from the breeder’s second field generation at their respective locations for two years. In 2009, 223 clones selected from the second field generation in one or more of six locations (FL, NC, NJ, NY, ME, ARS) in 2008 were evaluated for a second round of selection at the requesting location(s). The breeding program retained all clones requested by any location(s). Following the second round of selection, the 2 and 10 clones originally selected at all six and five locations, respectively; 24 of 30 clones selected at four locations; 35 of 46 clones selected at three locations; 42 of 69 clones selected at two locations; and, 22 of 66 clones selected at one location were retained for another cycle of selection. The greater the number of locations that selected a clone in the first round of selection, the more likely the clone was to be retained following the second round of selection. Of the 36 clones selected by >3 locations in the first two rounds of selection, 13 had not originally been selected by the breeder and would not normally have been available for evaluation. It may be possible to select more widely adapted clones earlier in the breeding program using this approach.