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Cytological Studies on Spikelet Sterility of Indica-Japonica Hybrids in Rice

Zhu Xiao-hon

Open publisher page 5 citations

Abstract

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 gametophytes occurred at the stage of the first microspore and megaspore mitosis. 2) Spikelet fertility was controlled by embryosac 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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What this paper is about

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 gametophytes occurred at the stage of the first microspore and megaspore mitosis. 2) Spikelet fertility was controlled by embryosac 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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Available abstract

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 gametophytes occurred at the stage of the first microspore and megaspore mitosis. 2) Spikelet fertility was controlled by embryosac fertility,pollen fertility and anther dehiscence. The latter two determined the number of germinating pollen on stigma and affected indirectly the fertilization of spikelets.

Key concepts: Microspore, Biology, Sterility, Pollen, Hybrid, Gametophyte, Stamen, Japonica

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