Cytological studies on spikelet sterility of indica-japonica hybrids in rice
1996
Zhu Xiaohong | Cao Xianzu | Zhu Qingsen (Yangzhou Univ., Jiangsu (China). Dept. of Agronomy)
Indica-japonica hybrids with or without wide compatible gene were used to investigate the characteristics of gametophytic development and the causes of spikelet sterility. The results showed that : 1) male and female gametophytes degenerated partly in some hybrids. The degeneration of male and female in some hbyrids. The degeneration of male and femal gametophytes occurred at the stage of the first microspore and megaspore mitosis. 2) Spikelet fertility was controlled by embryo sac fertility, pollen fertility and anther dehiscence. The latter two determined the number of germinating pollen on stigma and affected indirectly the fertilization of spikelets
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