Abstract
Potato production in the eastern United States occurs over a wide range of environments from Maine to Florida; many of these states do not have a breeding program. Initial selections are usually made at the breeding location for more than 2 years before undergoing evaluation elsewhere, at which point, few clones remain from the original population. The purpose of this study was to determine if parents that produce progeny with broad adaptation could be identified early in the USDA/ARS Potato Breeding Program. For 3 years (2007–2009), seed of all second field generation clones was distributed to five locations for selection. In 2008, 2009 and 2010, selections were made among 339, 321, and 381 clones, respectively. For each parent in each year, Chi-square values were calculated from the observed and expected number of progeny selected. Each year, parents that produced poorly- or broadly-adapted offspring were identified. Among the progeny selected at three or more locations, 27 to 70 % had not been selected by the breeding program. Early generation selection can be used to identify parents that produce broadly adapted progeny and may identify broadly adapted progeny before they are discarded by the breeding program. Because potatoes display such strong genotype × environment interactions, this selection approach may be particularly beneficial for selecting potato cultivars with broad adaptation.
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The technical help of Karl DeLong, Bonita Adams, Merle Bragg, and Brent Dyer is appreciated.
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Haynes, K.G., Gergela, D.M., Hutchinson, C.M. et al. Early generation selection at multiple locations may identify potato parents that produce more widely adapted progeny. Euphytica 186, 573–583 (2012). https://doi.org/10.1007/s10681-012-0685-1
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DOI: https://doi.org/10.1007/s10681-012-0685-1