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本文研究玉米植株轮廓曲线;叶片长度、宽度与叶位的函数关系以及叶片边缘轮廓曲线等4个儿何形态特征的统计模型。 1 材料与方法 供试材料取自中国农业大学科学园玉米源库生理育种圃。叶片长度、各叶位叶片距主茎最远点坐标通过多媒体图像处理技术获得;叶片最大宽度手工量取;叶片边缘轮廓曲线坐标选用不同叶型(宽叶型、窄叶型)的自交系和杂交种测定。将叶片形状描绘在坐标纸上,记载长、宽坐标(X_i,Y_i),每个叶片记载10个点以上。文中所涉及的性状,叶长系叶基至叶尖的主脉长度;叫位为从植株顶部向下的叶片数;植株轮廓点取坐标(X_i,Y_i),其中Y_i为叶片距茎秆最远点的距离,X_i系该点至地表的距离。叶片边缘轮廓坐标(X_i,Y_i)中X_i系第i点距叫尖的距离,Y_i是该点叶片的1/2宽度。
In this paper, the statistical models of four morphological characteristics of maize plants, such as the contour curve of the plant, the function of the leaf length and width as a function of the leaf position, and the contour curve of the leaf edge, were studied. MATERIALS AND METHODS Materials tested were collected from the maize source library physiological breeding garden of China Agricultural University Science Park. Leaf length, leaf position leaves the farthest point from the main stem coordinates obtained by multimedia image processing technology; maximum width of the leaf by hand to take; leaf edge contour curve coordinates selection of different leaf type (broad leaf type, narrow leaf type) inbred lines And hybrids. The shape of the blade is plotted on the coordinate paper, and the long and wide coordinates (X_i, Y_i) are described, with each blade recording 10 points or more. The characters involved in this paper are leaf length from the leaf base to the tip of the main vein. The call position is the number of leaves downward from the top of the plant. The plant contour points take coordinates (X_i, Y_i) The distance from the point, X_i is the distance from the point to the surface. X_i is the distance between the i-th point and the tip of the blade in the edge profile coordinates (X_i, Y_i) of the blade, and Y_i is the half width of the blade at that point.