水稻穗部性状与穗颈和倒二节间维管束数量关系的研究

Research on the Quantitative Relationship between Rice Panicle Characteristics and Vascular Bundle in Neck-panicle and Second Internode

利用51个粳稻品种(系)对穗部性状与穗颈和倒2节间维管束数量进行了相关研究。研究结果表明,水稻不同品种(系)间穗颈的维管束数量存在较大变异。穗颈大、小维管束数量、第2节间大、小维管束数量与穗部性状存在一定的相关性。选择穗颈和倒2节间大、小维管束数量多,穗颈大、小维管束数量之比和穗颈与第2节间大维管束数量之比较低的类型,有利于改善穗部性状。

The quantitative relationship between panicle characteristics and vascular bundle in neck-panicle and second internode of 51 japonica rice varieties were studied in this article.The results showed that there were extensive variation in the quantity of neck-panicle among different rice varieties.There has significance correlation between large and small vascular bundle number in neck-panicle and second internode and panicle characteristics, some types of rice varieties which are beneficial to improve panicle characteristics should be selected, it includes some characteristics as following： the amount of large and small vascular bundle in neck-panicle and second internode is large, the ratio of large to small vascular bundle number in neck-panicle is low, and the ratio of large vascular bundle number in neck-panicle to that in second internode is low.