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VOL. 10, ISSUE 7 (2025)
The effect of gene action in single crosses of corn (zea mays L.)
Authors
Israa M Agwan, Haitham A AL Mamary
Abstract
This study employed Griffing's fixed model
(1956) [18, 19]. in a hybridization program involving six pure
yellow maize varieties, resulting in the creation of fifteen hybrids at the
Agricultural Technical College in Mosul during the 2023–2024 growing season.
Utilizing a completely randomized block design, the research assessed various
genetic traits upon plant maturity, including plant height, number of shoots,
rows per shoot, and individual yield (grams). Statistical analysis revealed
significant mean squares for most traits at the 1% probability level. Notably,
variance components for plant height and number of shoots were higher than
expected. Additional genetic variance was significant across all traits except
for the number of stalks per plant. Environmental variation was consistently
positive, with dominant variance exceeding additive variance for all traits
except shoot count. This suggests that non-additive genetic factors
significantly influence certain characteristics such as row number and yield.
The average degree of dominance surpassed one percent for most traits; however,
broad-based heritability values remained below 60%, indicating low heritability
in a strict sense. These findings underscore the importance of hybridization
and indirect selection in enhancing maize traits while highlighting the complex
interplay between genetic and environmental factors in trait expression
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Pages:1-7
How to cite this article:
Israa M Agwan, Haitham A AL Mamary "The effect of gene action in single crosses of corn (<i>zea mays L</i>.)". International Journal of Botany Studies, Vol 10, Issue 7, 2025, Pages 1-7
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