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Abstract
Twenty-seven pure lines of lima bean collected over a wide geographical area were evaluated for response to photoperiod. The genotypes were grown in 6 chambers with photoperiods of 9, 11, 12.5, 14, 15.5 and 17.5 hours. Response to flowering among the genotypes was characterized by a polynomial regression model. Sixteen of the 27 genotypes were characterized as daylength neutral and 8 reacted sharply to daylength. Three genotypes reacted in a quantitative manner. Linear, quadratic, and cubic responses were observed.