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Fig. 2. Calculated leaf area fractions (F) as a function of downward leaf rank (L) for green leaves at silking stage. Each data set represents eight corn subspecies by physical and chemical traits of kernels, namely, Z. mays L. subsp. indurata Sturt, Z. mays L. subsp. indentata Sturt, Z. mays L. subsp. amylacea Sturt, Z. mays L. subsp. saccharata Sturt, Supersweet Mutant, Z. mays L. subsp. ceratina Kulesh, Z. mays L. subsp. everta, and Z. mays L. subsp. tunicata Sturt. The fitted model is F = F0exp[–0.5(L – L0)2/k2] (Eq. [5]), where F = individual green leaf area/plant green leaf area, L0 is the downward leaf rank with the maximum area fraction of F0, and k is a constant. R is the multiple correlation coefficient from model fitting.
