用叶龄模式预测杂交玉米器官形成的研究

研究结果表明，杂交玉米品种叶长和叶面积的节位分布，符合ｙ＝ａ＋ｂｘ＋ｃｘ２的二次方程变化特征。叶片———叶鞘———节间三元结构的同伸节位随玉米生育阶段的推进而增大。杂交玉米地下节根发生的最高层位可用Ｒ＝１２（Ｌ－１）的式子进行叶龄模式预测；地上部雌雄穗分化的每个阶段可用ｙ＝－０．０３７４（ｘ－２０）２＋１０的方程式进行叶龄模式预测。应用叶龄模式预测，其效果同观察结果相吻合

Forecasting Organogenesis of Hybrid Maize by Leaf Age Model

This paper deals with the Leaf Age Model (LAM) for different organs morphological diagnose in hybrid maize. The length and area of various leaf blade in plant model can be described as the regression equation: y=a+bx+cx 2, where y is the length and area of leaf blade, x is the node location of various leaf blade. The synchronous relationship for blade, sheath and internode changes with various growth stages. From seedling stage to shooting stage, the relation was the Nth to (N-2)th and (N-3)th; From shooting stage to big-bell stage, the relation became the Nth to (N-3)th and (N-4)th; From them on,the Nth blode, the (N-4)th sheath and the (N-5)th internode is synchronous organs.The maximum shooted nodel location of roots can be used by the formula: R=12(L-1), where R is the maximum location of model roots, L is the number of expanded leaves. The authors divided the corn generative spike differentiation into ten morphologioal stages. The foliage diagnose equtation using expanded leaves number was y=-0.03746(x-20) 2+10. They can be achieved good result for production in Jiangxi Province.