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

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.