两系杂交中籼华安3号穗部性状及灌浆特性研究

Studied on the Panicle and the Grouting Character of Two-line Medium Indica Hybrid Rice Hua'an 3

调查表明 ,华安 3号穗部性状表现为 :穗长与穗粒数、二次枝梗结实率与穗结实率呈极显著正相关 ;一次枝梗平均 13个 ,二次枝梗平均 38个 ,二者相关不明显 ;一次枝梗、二次枝梗着粒密度都较稳定 ,后者变幅较小。华安 3号灌浆特性表现为 :灌浆期约 40 d,灌浆强度最大的时间是始穗后 14- 2 1d,籽粒增重相对整齐。在灌浆期喷施

The analysis of the panicle character of two-line hybrid rice combination-Hua'an 3 showed: the relation between the length of the panicle and the spikelets per panicle, and between seed setting of the second branches and the seed setting of the panicle were positive correlation, reaching to bally significant level. The number of the first branch was 13 and the second branch was 38. The correlation between the first and second branch was not significant. The density of seed setting of the first branch and the second branch were all steady and the rang of change of the latter was little. The results of the studied on the grouting character of Hua'an 3 indicated:its period of grouting was about 40 days. The time of the fastest grouting was from 14-21 days after start heading. And the study showed that the rate of Hua'an 3 seed setting can be increased by HM foliar applicafion in its grain filling stage.