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Yield and leaf blade area comparisons of extra leafy to normal leafed maize (Zea mays L.)
Abstract
Inadequate information is available concerning the yield performance of maize (Zea mays L.) cultivars with genotypes of greater than normal leaf areas. Such genotypes are called Extra-leafy or Leafy cultivars and have greater leaf production above the first ear. The extra leafiness gene, symbolized by Lfy, follows the inheritance pattern of a single dominant gene. A study was conducted to compare the yield potential of Lfy cultivars to normal-leafed industry standards and to analyze regression relationships between extra leaf production and rain yield of the leafy 9 hybrids. Fourteen hybrids were compared, including, eight Lfy and six normal-leafed industry standard hybrids. The fourteen hybrids were replicated four times in a randomized block design at the Texas A&M Research Farm near College Station, Texas and an identical experiment was performed in the panhandle region of Texas near Springlake. Leaves were cut off from the stalk below the collar and included the leaf below the .second ear and all leaves above it. The collars were removed from the leaves of two representative plants of the fourteen hybrids in each replication, and relative leaf blade areas were calculated using a Delta T Area Meter and Conveyor Belt Unit. Regression analysis showed that with the exception of hybrid 2000 Lfy, which had the greatest production of leaf matter but was one of the poorest grain producers in both locations, there was a moderate relationship between leaf production and yield among Lfy hybrids. However, Lfy hybrids on the average yielded less than the normal-leafed hybrids. Although leaf blade areas were 6 and 4% more for the leafy hybrids than for the normal-leafed hybrids in the College Station and Springlake test respectively, grain yields were 10 and 257o less in the leafy material than the normal-leafed hybrids in the respective locations. Significant hybrid X location interaction could be partially due to hail damage that occurred to the Springlake test. Mean yields in both locations of 8 leafy hybrids were lower than the mean yields of the 6 normal hybrids showing that the leafy genotype did not demonstrate any yield advantage over the normal-leafed counterpart.
Description
Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to digital@library.tamu.edu, referencing the URI of the item.Includes bibliographical references: p. 47-49.
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Citation
Rushing, Ronald Wayne (1996). Yield and leaf blade area comparisons of extra leafy to normal leafed maize (Zea mays L.). Master's thesis, Texas A&M University. Available electronically from https : / /hdl .handle .net /1969 .1 /ETD -TAMU -1996 -THESIS -R87.
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