Leaf Blade Areas of Grain Sorghum Varieties and Hybrids
1973
Liang, G. H. | Chu, C. C. | Reddi, N. S. | Lin, S. S. (Shing Shyong) | Dayton, A. D.
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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