Abstract
A series of tropical maize hybrids, involving 10 single, four double and four three-way crosses were evaluated with their parental inbred lines and three control varieties, at Universiti Putra Malaysia, Serdang, Malaysia, in a randomized complete block design, with three replications. The objectives were to identify hybrids superior for yield, yield components and other agronomic traits, to estimate heterosis revealed by the hybrids, and to estimate broad-sense heritability for important characters in the populations. The hybrids were found to vary highly for grain yield and most other traits measured. High estimates of heterosis were shown by grain yield, ear weight and grain weight per ear, moderate for plant and ear heights, shelling percentage, ear diameter, number of kernel rows per ear, number of kernels per ear row and 100-grain weight. The hybrids flowered and matured earlier than their respective inbred parents. Estimates of broad-sense heritability also varied with characters. Moderate heritability was shown for grain yield indicating a substantial amount of genetic variation in this population of hybrids. Low and negligible heritability for days to silking and 100-grain weight indicate that these traits were very much influenced by environmental factors. Based on the overall performance of the hybrids, the single cross, SC-2, the double cross, DC-11 and the three-way cross, TWC-15, were found to have high potential. No obvious differences were observed in performance among the three categories of hybrids, the single, double and three-way crosses.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 12
Claim · model-written summary
Maize hybrids varied highly in grain yield and most measured traits.
Verbatim
e0“The hybrids were found to vary highly for grain yield and most other traits measured”
t0“tropical maize”
Claim · model-written summary
Grain yield, ear weight and grain weight per ear showed high heterosis.
Verbatim
e0“High estimates of heterosis were shown by grain yield, ear weight and grain weight per ear”
t0“tropical maize”
Claim · model-written summary
Plant and ear heights and shelling percentage showed moderate heterosis.
Verbatim
e0“moderate for plant and ear heights, shelling percentage, ear diameter, number of kernel rows per ear, number of kernels per ear row and 100-grain weight”
t0“tropical maize”
Claim · model-written summary
Ear diameter, kernel row counts, kernels per row and 100-grain weight showed moderate heterosis.
Verbatim
e0“moderate for plant and ear heights, shelling percentage, ear diameter, number of kernel rows per ear, number of kernels per ear row and 100-grain weight”
t0“tropical maize”
Claim · model-written summary
Hybrids flowered and matured earlier than their inbred parents.
Verbatim
e0“The hybrids flowered and matured earlier than their respective inbred parents”
t0“tropical maize”
Claim · model-written summary
Broad-sense heritability varied across characters.
Verbatim
e0“Estimates of broad-sense heritability also varied with characters”
t0“tropical maize”
Claim · model-written summary
Grain yield had moderate heritability, indicating substantial genetic variation.
Verbatim
e0“Moderate heritability was shown for grain yield indicating a substantial amount of genetic variation in this population of hybrids”
t0“tropical maize”
Claim · model-written summary
Days to silking and 100-grain weight had low or negligible heritability.
Verbatim
e0“Low and negligible heritability for days to silking and 100-grain weight indicate that these traits were very much influenced by environmental factors”
t0“tropical maize”
Claim · model-written summary
SC-2 was identified as having high potential.
Verbatim
e0“the single cross, SC-2, the double cross, DC-11 and the three-way cross, TWC-15, were found to have high potential”
t0“tropical maize”
Claim · model-written summary
DC-11 was identified as having high potential.
Verbatim
e0“the single cross, SC-2, the double cross, DC-11 and the three-way cross, TWC-15, were found to have high potential”
t0“tropical maize”
Claim · model-written summary
TWC-15 was identified as having high potential.
Verbatim
e0“the single cross, SC-2, the double cross, DC-11 and the three-way cross, TWC-15, were found to have high potential”
t0“tropical maize”
Claim · model-written summary
Single, double and three-way hybrid categories showed no obvious performance differences.
Verbatim
e0“No obvious differences were observed in performance among the three categories of hybrids, the single, double and three-way crosses”
t0“tropical maize”