论文部分内容阅读
从1996年至2006年对同源四倍体水稻亲本材料的结实率、每穗实粒数、穗长和有效分蘖等主要农艺性状进行了连续地选择和改良.结实率的改良效果显著,所有材料的平均结实率均呈上升趋势.每穗实粒数的改良上升趋势比较显著,除保持系的DTB之外,其余材料的每穗实粒数有显著提高.穗长和有效分蘖总体上有所提高,但不同年份有较大的波动.对株高、剑叶长等性状的选育效果不显著.研究表明:不同品系间农艺性状差异显著高于品系内,说明遗传力较显著地决定重要农艺性状,通过连续改良,重要农艺性状可以得到显著改善.该结果为同源四倍体水稻的进一步改良提供了一定的理论支持.
The main agronomic traits such as seed setting rate, grain number per panicle, spike length and effective tiller of the autotetraploid rice parents were continuously selected and improved from 1996 to 2006. The improvement of seed setting rate was significant and all The average seed-setting rate of the materials showed an upward trend.The improvement trend of the number of grains per panicle was significant, except for the DTB of the maintainer lines, the number of seed grains per panicle of the other materials increased significantly.The overall length of spike length and effective tillers , But there was great fluctuation in different years.No significant effect was found on the plant height, the length of flag leaf and other traits.The results showed that the difference of agronomic traits between different lines was significantly higher than that in the lines, Significant improvement of important agronomic traits can be achieved through continuous improvement of important agronomic traits, which provides some theoretical support for the further improvement of autotetraploid rice.