Abstract: In this paper, The anatomized observation of the spikelet structure of the cultivated multiple grain sorghum variety SZ0 and the sorghum double grain varieties which were collected from home and broad was carried on, and found that there exits the exceptional structure of the third glume, double awn, multi-lodicule, multi-seed, multi-pistil , multi-anther, multi-stigma, and twinborn conjoined seeds in the spikelet of the multiple grain sorghum. Multiple grain properties was controlled by the homologous gene and the composite grain properties gene of different varieties behaves differently. In the variety of TX431, It is dominance to single grain to multiple one. In our farmhouse variety of our country, It is recessiveness to single grain to multiple one.

Key words: multiple grain sorghum, multi- pistil, multi-stigma, spikelet structure, heredity analysis