杂交粳稻花优14种子质量快速预测方法研究

Rapid Prediction Method of Seed Quality of Hybrid Japonica Rice Huayou 14

发芽率是种子质量的重要指标。《农作物种子检验规程》中对种子发芽率测定有具体的方法,但该方法实验周期较长,不能快速预测种子质量。花优14是上海地区主要栽培的杂交粳稻品种,种植面积常年占上海市杂交水稻种植面积的50.00%以上。以花优14种子为研究对象进行试验,发现花优14种子3 d的发芽势和15 d的发芽率显著正相关(r=0.965),比较各种函数模型发现,一元二次函数模型拟合性最高,发芽势可以较准确的预测发芽率;进一步研究还发现,花优14种子发芽势与田间出苗率相关。上述结果对于快速准确预测花优14种子质量,保障上海地区杂交粳稻的用种安全具有重要意义。

Germination rate is an important quality indicator for seeds.There is a specific method for determining seed germination rate in the“Regulations for Inspection of Crop Seeds”(GB/T 3543.1~7—1995),but this method has a long experimental period and cannot quickly predict seed quality.Huayou 14 is a major hybrid japonica rice variety cultivated in Shanghai,with an annual planting area accounting for over 50.00%of the hybrid rice planting area in Shanghai.An experiment was conducted on the seeds of Huayou 14,and it was found that the 3 d germination potential and 15 d germination rate of Huayou 14 seeds was significantly correlated(r=0.965).By comparing various function model,it was found one-variable quadratic functional model have highest fitting,germination rate can be accurately predicted by germination potential.Further research also found that the germination potential of Huayou 14 seeds is related to the field emergence rate.The above results are of great significance for quickly and accurately predicting the seed quality of Huayou 14 and ensuring the safety of hybrid japonica rice in Shanghai.