水稻功能基因标记遗传距离与杂种优势的相关性研究

摘要

The genetic difference among twenty-nine rice parents (eighteen cytoplasmic male sterile lines and eleven restorer lines) was analyzed by SSR molecular markers of functional genes related to yield traits. The correlation between genetic distance and heterosis was studied by reference to the performance of forty-seven combinations. The results showed that the correlation between the genetic distance and yield heterosis was significant(r=0. 29*). indicating the possibility of forecasting heterosis according to the genetic distance based on molecular markers of functional genes. The correlation between the genetic distance and the heterosis of other yield-related traits was insignificant. However, the correlation coefficient obtained in the study was too small to predict heterosis.%利用与产量性状相关的功能基因标记分析了29个杂交水稻组合亲本间(18个不育系和11个恢复系)的遗传差异,结合29个亲本所配组合(47个)的F1表现,研究了功能基因标记遗传距离与杂种优势的相关性.结果表明,功能基因标记遗传距离与产量杂种优势呈显著正相关(r=0.29*),而与其他主要产量构成因素的杂种优势相关不显著.说明功能基因标记有可能应用于杂交水稻杂种优势预测,但得到的相关系数偏小,还不足以预测杂种优势.