Abstract:

Forty-six rice cultivars and lines attended regional trials in Liaoning, Jilin and Heilongjiang provinces in 2004 were used to study panicle characteristics and it relationship with yield and quality in Shenyang city, Gongzhuling city and Jiamusi city with higher cultivated level. The results indicated that there was significant difference in grain yield and yield components between different cultivars and lines, and grain yield of Liaoning province was significantly higher than that of Jilin and Heilongjiang provinces, but there was no significant grain yield difference between Jilin and Heilongjiang. The number of panicle per unit area and grains per panicle in Liaoning were very significantly lower than those in Jilin and Heilongjiang, and other yield components were not significantly different among different provinces. Difference of panicle traits was significantly different among all the materials in these provinces, except seed-setting rate of primary branch. The panicle length of Liaoning was 2 cm shorter than that of Jilin and Heilongjiang, and grains density, the number of primary branch and primary branch grains in Liaoning were very significantly larger than those in Jilin and Heilongjiang. Brown rice percentage was in order of Jilin＞Liaoning＞Heilongjiang, milled rice percentage was in order of Jilin＞Liaoning and Heilongjiang, head rice percentage was in order of Heilongjiang ＞Jilin＞Liaoning, the ratio of grain length to width in Liaoning and Heilongjiang was higher than that in Jilin. Chalky grain rate in Jilin was higher than that in Liaoning and Heilongjiang, the taste value was the highest in Heilongjiang, and followed by in Jilin and Liaoning. The processing quality was negatively correlated to grains per panicle, grain density, primary branches, the number of primary branch, secondary branches, ratio of secondary branch grains/total grains, but positively correlated with seed setting rate, seed-setting rate of primary branch and secondary branch, and the relationship between eating quality and panicle character appeared the similar trend.

Key words: Rice, Northern-east region, Panicle traits, Quality character, Yield