中国水稻科学

中国水稻科学

• 研究简报 • 上一篇    下一篇

杂交稻制种田九二○用量与种子中GA3含量及F1代产生徒长苗的关系

胡汉桥 1;李 祥 2   

  1. 1 解放军农牧大学农学系，长春130062； 2 华中农业大学植物保护系，武汉430070
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1997-01-10 发布日期:1997-01-10

Relation between the Dosage of Gibberellin in Hybrid Rice Production and the Content of GA3 in Hybrid Rice Seed,the Elongation of the F1 Seedling

Hu Hanqiao; Li Xiang   

  • Received:1900-01-01 Revised:1900-01-01 Online:1997-01-10 Published:1997-01-10

PDF

摘要： 以杂交水稻组合汕优63为材料进行研究。结果表明，杂交稻制种抽穗期施用九二Ο，在其所产种子中会有一定量的GA3积累，其GA3的含量与制种时抽穗期九二○施用量呈正相关。试验和检测证明，制种田抽穗期九二Ο用量在每667 m2 8～18 g范围内，其种子中的GA3含量在49.5～63.5 ng/g之间，均大大低于能引起幼苗徒长的GA3含量(946 ng/g)。可以认为，生产中杂交稻田产生的徒长苗与制种时抽穗期施用九二Ο无关。经在制种田花期喷雾接种稻恶苗病菌(Fusarium moniliforme)孢子的试验证明，杂交稻幼苗中产生的徒长苗是由恶苗病菌经花器侵染后种子带菌所引起的，杂交稻中产生徒长苗与抽穗期九二○的施用无关。

关键词: 杂交稻, 赤霉素, 徒长苗

Abstract:

The tested results indicated that the elongating seedling was induced when the content of GA3 in rice seed per gram was equal to or more than 94. 6 ng. The content of GA3 in F1 seed per gram was 23. 8, 49. 5, 53. 5 and 63. 5 ng respectively when the dosage of gibberellin was 0, 8, 13 and 18 g per 667 m2 in the hybrid rice seed production. These contents in the hybrid rice seed were much less than 94. 6 ng which could induce the rice seed to grow up elongating seedling. However, significant correlation existed between the content of GA3 in F1 seed and dosage of gibberellin in hybrid rice seed production. The further experiments proved that all of the aforementioned dosage of gibberellin could not induce the elongating seedling in F1 and that the elongating seedling in hybrid rice was caused by Gibberella fuiikuroi which infected the seed during blooming stage.

Key words: elongating seedling, gibberellin, hybrid rice