水稻原种不同代别的纯度与产量效应及其相关性研究

A Study on The Correlation of Purity and Yield of Original Seed of Rice in Different Generations

选用本区单季晚粳稻品种“早单八”,对其原种不同代别的种子进行了纯度与产量以及相关性状的比较研究。结果看出:随原种种植代别的增加,田间纯度逐代下降,两者呈高度负相关(r=-0.868^(**)),而各代别的纯度与产量则存在极显著正相关(r=0.954^(**))。低代别种子之所以具有较高的生产力,拟主要通过提高结实率表实现的。进一步分析还看出:原种不同代别的杂株本与产量存在极显著的回归关系,其回归方程为Y=564.32—9.38X。综上表明:以田间杂株率高低来估计不同代别纯度种子的实际产量,将有一定的实践意义。按该方程推算,原种代别利用的临界纯度拟应为98%,原种连续种植的实际年效应最多为4年。

Through the study of correlation between yield and purity of original Seed from different generations in single late Kengrice Zao-Dan No. 8. The results showed that seed pruity would fall gradually with the increasing of planting generations of original seed, appearing the close negative correlation (r=-0. 868^(**)) between them. Whereas the Yield and purity from different generations were positive correlation (r=0. 954^(**)). While The study indicated that the seeds of low generations had higher productivity which achieved by raising seeding rate. The study was further shown that mixed plant rate of original seed from different geuerations had significant regression relation with yield, whose regression equation was Y=564.32-9.38x. It implies that utilization of critical purity of original seed from different generations is 98 percent and the actual year effects of original seed for seccessive planting is four years at the utmost