籼粳亚种间杂交稻米脂肪含量的遗传分析

用包括基因型×环境互作效应的种子性状遗传模型，研究了籼粳亚种间杂交稻米脂肪含量的遗传特性，结果表明：在籼粳杂种中，脂肪含量的遗传表达主要受控于种子直接加性效应和母体加性效应，以前者为主．基因型X环境互作主要表现为显性（包括直接显性和母体显性）X环境以及细胞质X环境工作．直接近传率和母体遗传率都极显著．此外，根据遗传效应预测值对供试条本的利用价值作了评价．

GENETIC ANALYSIS OF FAT CONTENT IN INDTCA-JAPONICA INTERSUBSPECIFIC HYBRID RICE (ORYZA SATIVA L)

Genetic analyses were conducted fot fat content of indicajmpnica hybrid rice byusing genetic medels with genotype x environment interaCtions for seed traits. The resultsindicated that the fat content in rice was mainly controlied simultaneously by seed directadditive and matemal additive effects, with the former predominating. Genotype x environmentinteractions expressed mainly as dommancex environment (including direct dondnance xenvironment and maternal dondnance x environment) and cytoplasm x environmentinteractions- Direct and matemal heritabilities were highly significant. The potential valuesof parehtal lines for the improvement of fat content were discussed in respeet to predictedvalues of genetic effects.