大豆花芽分化和物候期的机理模型

利用作物生理发育时间恒定原理,系统构建了预测大豆花芽分化和物候期的机理模型。模型以Bate函数的特殊形式来表达温度热效应,引入温度敏感性、光周期敏感性、基本早熟性和灌浆因子4个品种遗传参数区别品种间的差异。不同地区、不同品种的花原基分化期、雌雄蕊原基分化期、胚珠花粉形成期等花芽分化阶段和出苗期、开花期、结荚期、鼓粒期、成熟期等物候期的预测结果表明,模型对大豆生育阶段的绝对模拟误差为0～4d,根均方差不超过3d。

Mechanism model for flower bud differentiation and phenophase of soybean

A mechanism pattern was systematically established to predict flower bud differentiation and phenophase of soybean by using the principle of crop physiological development time constancy.Specific Bate function was applied in the model to present the thermal effect.Four genetic parameters as temperature sensitivity,photoperiod sensitivity,intrinsic earliness and filling fraction,were used to distinguish the difference in varieties.Result tested in different plant regions included flower bud differentiation（including perianth,pistil and stamens primordia,ovule and pollen differentiation or formation）,and phenophase（including flower primodium differentiation period,pistil and stamen primodium differentiation period,ovule and pollen formation period,seedling,blooming,podding,seed filling,and ripening.It suggested that the analogy model of soybean development stages was predictable with the most absolute errors of analogy between 0 and 4d.The root mean square error（RMSE） of the model was less than 3d.