Spikelet fertility affected by low temperature in Indica-Japonica hybrids of rice (Oryza sativa L.)
1999
Lu, C. (Jiangsu Academy of Agricultural Sciences, Nanjing (China)) | Zou, J. | Ikehashi, H.
The present study was carried out to examine the effect of low temperature on the spikelet fertility of indica-japonica hybrids, and to investigate the factors responsible for male gamete abortion. The spikelet fertility of F1 hybrids of five crosses was significantly reduced at low temperatures just before flowering. The reduced spikelet fertility was considered to be related to pollen fertility which was expressed by the ratio of stained pollen grains and distorted segregation of markers in the progenies. At a lower temperature, the fertility of pollen expressed by the ratio of stained pollen grains was reduced, indicating that some of the male gametes were weakened or had lost their function in fertilization. Utilization of distortion-neutral genes to stabilize pollen fertility was proposed
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