Selection against inbred seedlings in mixtures of inbred and hybrid true potato seed |
| |
Authors: | G. N. Atlin S. G. Wiersema |
| |
Affiliation: | (1) Department of Agronomy, Iowa State University, 50011 Ames, IA, USA;(2) International Potato Center, Bangkhen, P.O. Box 9-159, 10900 Bangkok, Thailand |
| |
Abstract: | Summary The effect of selection against weak plants was studied in artificial mixtures of hybrid (S0), first self-pollinated generation (S1), and second self-pollinated generation (S2), true potato seed. Selection of vigorous seedlings in true seed populations raised in flats from mixtures of S0 (25%), S1 (50%), and S2 (25%) seed increased the frequency of hybrids to 71%. In another study, two mixtures of S0 and S1 seed (1∶3 and 1∶1) were densely sown in beds to produce seedling tubers. Elimination of weak plants during population thinning and subsequent interplant competition significantly reduced the frequency of inbred plants. The resulting seedling tuber progenies were planted in the field and mean yields from the two mixtures of S0 and S1 seed were 96% and 99% of related completely hybrid progenies. The implications of these results for TPS production are discussed. |
| |
Keywords: | Open-pollinated progenies inbreeding depression visual selection competition tuber yield |
本文献已被 SpringerLink 等数据库收录! |
|