Studies on the effects of temperature during the reduction division and the grain filling stage in rice plants, 1: effect of temperature at the reduction division stage in indica-Japonica crosses

Kim, K.C.

Studies on the effects of temperature during the reduction division and the grain filling stage in rice plants, 1: effect of temperature at the reduction division stage in indica-Japonica crosses

1983

Kim, K.C. (Chunnam National Univ., Kwangju (Korea R.))

This is a study on the temperature during the reduction division stage on the indica-Japonica rice varieties in artificial temperature-controlled cabinets (Bioclimatic Laboratory). The most sensitive stage to low temperature, the tetrad stage, was observed in each variety with the following auricle distance: Jinheung, -12cm; IR36, -3cm; Suweon 264, -3cm; Milyang 29, -6cm and Lengkwang, +1cm. In Jinheung, sterility was 46.8%; IR36, 67.6%, Suweon 264, 60.9%; Milyang 29, 62.2%; Lengkwang, 27.8%. The lowest fertility of special spikelets was at the tetrad stage and the first contraction phase. The palea length elongated nearly in a straight line from the spikelet formation to flowering

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