The grain number per panicle of ratooning rice in vitro was much larger than that in vivo, and the extent was increased with the decline of node, especially for Peiliangyou 210.

• 离体条件下再生稻穗粒数较母体条件下显著提高，且提高幅度随节位下降而增大，培两优210表现更为明显。