论文部分内容阅读
稻米淀粉黏滞性谱(RVA谱)常被用来鉴定水稻种质资源和所选优良株系的食味品质,RVA成糊温度(PT)却不能准确反映糊化温度(GT),校准成糊温度PT m能够比较准确地反映GT,但PT的校准范围、PT m衡量稻米GT的准确程度以及SSIIa基因型对其的影响等并未见报道。本研究利用遗传背景差异小、双亲糊化温度差异大的B1F8株系中的58个单株为材料,通过检测其SSIIa基因型,将材料分为3类,分别在3种SSIIa基因型的遗传背景下,比较分析PT、PT m、GT,结果表明,SSIIa基因型不同,PT的校准范围明显不同;PT衡量稻米GT的准确率仅为39.66%,而PT m准确率达到89.66%。进一步利用PT和PT m分别表示GT,分析稻米AC与GT关系,得出与一些学者不同的结论:稻米AC与GT呈极显著负相关性。
Rice starch viscosity spectroscopy (RVA) is often used to identify rice germplasm resources and food quality of the selected good lines. The RVA pasteurization temperature (PT) does not accurately reflect the gelatinization temperature (GT) The temperature PT m can reflect the GT more accurately, but the calibration range of PT, PT m to measure the accuracy of rice GT and the effect of SSIIa genotype have not been reported. In this study, 58 individuals of B1F8 lines with small genetic backgrounds and large differences of gelatinization of their parents were used as materials. The SSIIa genotypes were divided into three groups. The genetic variations of three SSIIa genotypes The results showed that the calibration range of PT was significantly different with different SSIIa genotypes. The accuracy of PT was only 39.66% for PT and 89.66% for PTm. Further using PT and PT m to represent GT respectively, the relationship between AC and GT in rice was analyzed, and the conclusion reached by some scholars was that there was a significant negative correlation between rice AC and GT.