Esteimats of the Genetic Parameters for Yield and its Attributes of Wheat under Optimum and Late Sowing Dates
Marwa M. El-Nahas; A. El-Gabry, Yasser;
Abstract
Generation mean analysis was used for study the natural of gene action for yield and its attributes in
three hybrids of bread wheat. Six parameters model was used in three wheat hybrids under optimum sown (25th
Nov.) and late sown (25th Des.). The results cleared that the (P1, P2, F1, F2, Bc1 and Bc2) mean values in late
sown were less than the optimum sown for all the studied characters in all hybrids. Heterosis relative to midparent and better parent was found to be positive significant for most characters under optimum and late sowing
dates. The relative consequence of additive and dominance effects differed for characters in all hybrids under
two different sowing dates. Dominance effects were generally more important than additive for most the
characters in all the studied hybrids under two different sowing dates. Indicating, dominant genes played a part
in the inheritance of these characters. Dominance × dominance gene interaction was higher in extent than
additive × additive and additive × dominance in most the studied traits under two different sowing dates.
Indicating, these traits are greatly influenced by dominance and dominance x dominance interactions. Therefore,
it is approved to lateness selection to late segregating generations to raise homozygosity. Heritability values in
narrow sense were moderate to high for all the studied characters in all hybrids under two different sowing dates.
Genetic advance was ranged from low to high for all characters in all hybrids under two different sowing dates.
three hybrids of bread wheat. Six parameters model was used in three wheat hybrids under optimum sown (25th
Nov.) and late sown (25th Des.). The results cleared that the (P1, P2, F1, F2, Bc1 and Bc2) mean values in late
sown were less than the optimum sown for all the studied characters in all hybrids. Heterosis relative to midparent and better parent was found to be positive significant for most characters under optimum and late sowing
dates. The relative consequence of additive and dominance effects differed for characters in all hybrids under
two different sowing dates. Dominance effects were generally more important than additive for most the
characters in all the studied hybrids under two different sowing dates. Indicating, dominant genes played a part
in the inheritance of these characters. Dominance × dominance gene interaction was higher in extent than
additive × additive and additive × dominance in most the studied traits under two different sowing dates.
Indicating, these traits are greatly influenced by dominance and dominance x dominance interactions. Therefore,
it is approved to lateness selection to late segregating generations to raise homozygosity. Heritability values in
narrow sense were moderate to high for all the studied characters in all hybrids under two different sowing dates.
Genetic advance was ranged from low to high for all characters in all hybrids under two different sowing dates.
Other data
Title | Esteimats of the Genetic Parameters for Yield and its Attributes of Wheat under Optimum and Late Sowing Dates | Authors | Marwa M. El-Nahas; A. El-Gabry, Yasser | Keywords | Bread wheat;Six parameter model;Sowing dates;Heterosis;Heritability;Gene action | Issue Date | 1-Dec-2021 | Journal | Journal of Plant Production | Volume | 12 | Issue | 12 | Start page | 1343 | End page | 1350 | DOI | DOI: 10.21608/jpp.2021.220181 |
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