Breeding of High Oil Hybrid Corn (Zea mays L.)
Kasetsart University, Chatuchak, Bangkok 10900
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Nineteen inbred lines (S4 and S5) were extracted from the Alexander high oil (AHO) corn variety at the National Corn and Sorghum Research Centre and used as male parents to form single cross and three-way cross hybrids. Female parents were Ki 3, Ki 21, and Ki 27 inbred lines along with KSX 2901 and KSX 2903 single cross hybrids. The obtained ninety-five hybrids were arranged in yield trial.
A result revealed that grain yield of single cross hybrids was higher than that of three-way cross hybrids (4,569 versus 4,363 kg/ha.. Oil contents of single cross and three-way cross hybrids were slightly different (at 5.6 versus 5.8 percent). The high oil yield (769 kg/ha) was obtained from the Ki 3 x AHO 19-1-4-3-3-4 single cross hybrid; and the KSX 2903 x AHO 19-1-4-3-3-4 three-way cross hybrid had oil yield of 719 kg/ha. The good AHO 19-1-4-3-3-4, AHO 19-1-4-3-1-4, {DA(HO) 8-1 x HO 1-2} S4-1-1-2, and {AHO 21-2 x DA(HO) 8-1}S4-1-2-1 inbred lines had the oil contents of 5.0, 7.3, 7.2, and 13.0 percent, respectively.
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