籼稻RAPD标记遗传距离与杂种后代稻米味度及RVA谱特性的相关分析

 选用8个籼稻品种按Griffing双列杂交方法Ⅳ配制28个F1杂交组合，分析了RAPD分子标记籼稻遗传距离与稻米味度及淀粉粘滞性谱（RVA谱）杂种优势的关系。结果表明， 利用297个多态性RAPD标记位点计算8个亲本间分子标记遗传距离，其范围在0.197~0.349，平均为0.269，8个亲本可划分为2个类群；味度值和RVA谱的中亲优势平均而言介于双亲之间，分子标记遗传距离与F1味度值和RVA谱的表现以及杂种优势间的相关均不显著，味度值和RVA谱杂种优势与亲本间的遗传差异大小无关；双亲味度和RVA谱平均值与杂种味度和RVA谱之间均呈极显著的正相关，双亲味度值和RVA谱的平均值高，杂种味度值和RVA谱也就高。

Analysis on Genetic Distance Based on RAPD Marker as Related to the Taste Meter and RVA Properties in indica Rice Hybrids

Eight indica rice varieties were crossed according to Griffing′s diallel method Ⅳ and 28 F 1s were obtained to analyze the relationship between genetic distance based on RAPD marker and taste meter and starch RVA(Rapid Visco Analyzer) properties. The genetic distance of eight parents based on 297 polymorphism of RAPD marker varied in the range of 0.197-0.349, and the average value was 0.269. The eight parents could be divided into two groups. The mid-parent values of taste meter and starch RVA were between parents. The genetic distance based on RAPD maker was not correlated to heterosis of taste meter and RVA properties of F 1 at significant level. The heterosis of taste meter and RVA properties had no correlationship with genetic divergences of parents. The average values of taste meter and RVA of parents were correlated to those of hybrids at very significant level. If the average values of taste meter and RVA of parents are high, the values of hybrids are accordingly high.