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Spikelet fertility during five consecutive days of anthesis of four rice varieties under LT and AT. On different days, individual spikelet fertility was marked with different colored acrylic paints (n = 10), and the fertility of spikelets undergoing anthesis was scored separately. Bars with different lowercase letters denote spikelet fertility, which differ at a significance level of 0.05. Smaller bars indicate standard error. AT, ambient temperature; LT, low temperature.
