论植物杂种优势的研究途径

Research On the Ways of Heterosis

植物群体叶面积指数与平均单位叶面积截获光能的反相关导致群体光能截获杂种优势形成的必然性,各种养分环境消耗进入临界点同步性改善导致养分获取杂种优势形成的必然性。植株质量或作物产量的杂种优势主要由双亲群体光能截获和各种养分获取的特征及差异所决定。遗传与环境的相互作用决定了杂种优势的形成过程。动态跟踪植株群体光照结构、植株质量或产量形成过程、根际环境中各种养分的浓度等因子有助于理解杂种优势形成过程,单独研究双亲遗传差异不能获得杂种优势形成的一般机制。

The inverse correlation between the leaf area index of plant population and the light energy intercepted per unit leaf area leads to the inevitability of the formation of heterosis of population light energy intercepted,and the improvement of synchronicity of various nutrient environmental consumption into the critical point leads to the inevitability of the formation of heterosis of nutrient obtained.The heterosis of plant weight or crop yield is mainly determined by the characteristics and differences of light interception and various nutrients acquisition of parents.The interaction between heredity and environment determines the formation of heterosis.Dynamic tracking of light structure,plant weight or yield formation process,concentration of various nutrients in rhizosphere environment and other factors is helpful to understand the formation process of heterosis.The general mechanism of heterosis formation can not be obtained by studying the genetic difference between parents in isolation.