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This article in AJ

  1. Vol. 65 No. 3, p. 456-459
    Received: Aug 16, 1972



Leaf Blade Areas of Grain Sorghum Varieties and Hybrids1

  1. G. H. Liang,
  2. C. C. Chu,
  3. N. S. Reddi,
  4. S. S. Lin and
  5. A. D. Dayton2



The experiments were conducted to evaluate the amount of heterosis for leaf-blade area in grain sorghum {Sorghum bicolor (L.) Moench} hybrids. Total leaf-blade area was measured on plants of six varieties and their 15 hybrids, at two locations in 1971. Hybrids had significantly greater total leaf-blade area, average leaf-blade area, average leaf length and width, and grain yield as compared to parents. However, parents had significantly more leaves than hybrids. Differences between parents and hybrids for total leaf-blade area, average leaf-blade area, and average leaf-blade width varied from location to location. Blade areas of leaves 2, 4, 5, 6, and 7 (flag leaf as number 1) of the hybrids were significantly larger than those of corresponding leaves of the parents. Total leaf-blade area correlated positively and significantly with leaf-blade area of the largest leaves, numbers 5, 6, 7 and 8. Adjacent leaves also correlated significantly with respect to blade size. Heritability for total leaf-blade area was high.

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