论文部分内容阅读
研究结果表明 :组织氮、果糖积累和含量的杂种优势因品种和取样日不同而异。植株、茎秆的果糖积累在开花期前表现正向杂种优势 ,而叶片为负向优势 ;不同生育期组织氮积累一般为正向中亲优势 ,而果糖和组织氮含量一般为负向优势。籽粒产量、籽粒氮 (蛋白质 )产量和含量的平均中亲优势分别为 8.55%、7.3 1 %和 -0 .90 %。果糖积累的杂种优势与籽粒产量、籽粒氮 (蛋白质 )产量和含量优势一般无显著相关关系 ;开花期和灌浆末期植株果糖含量的杂种优势正相关于籽粒产量优势 ,负相关于籽粒氮 (蛋白质 )含量优势。组织氮积累和含量的杂种优势与籽粒产量的优势无显著相关关系 ,而与籽粒氮 (蛋白质 )产量和含量优势多为正相关。这表明很有可能通过间接选择高的组织氮积累和含量杂种优势 ,以提高籽粒氮 (蛋白质 )产量和含量杂种优势 ,而不降低或者提高籽粒产量杂种优势。
The results showed that the heterosis of tissue nitrogen and fructose accumulation and content varied with different varieties and sampling dates. The accumulation of fructose in plant and stem showed positive heterosis before flowering, while the leaf was negatively predominant. The accumulation of nitrogen in tissues at different growth stages was generally positive in progeny, while the content of fructose and nitrogen in tissues was generally negatively predominant. The average mid-pro-dominant of grain yield, grain nitrogen (protein) yield and content were 8.55%, 7.31% and -0.90%, respectively. There was no significant correlation between the heterosis of fructose accumulation and grain yield, yield and content of grain nitrogen (protein). The heterosis of fructose content in flowering stage and late filling stage was positively correlated with grain yield, negatively correlated with grain nitrogen (protein) Content advantage. There was no significant correlation between the heterosis of nitrogen accumulation and grain yield and the superiority of grain yield, but positively correlated with the yield and content of grain nitrogen (protein). This suggests that it is possible to increase heterosis of grain nitrogen (protein) yield and content by indirectly selecting high tissue nitrogen accumulation and content heterosis without reducing or increasing heterosis in grain yield.