Tariq Al-Mafarji; Dr.JasimJasim Mohammed Aziz Al-Jubouri; Adnan Kanbar
Volume 24, Issue 3 , September 2024, , Pages 182-196
Abstract
In order to study the combining ability and gene action for the yield and specific traits related to the grain quality of the genotypes of seven bread wheat (SK94, SK 95, Side 12, Side14, Giemiza 7, Giemiza 9, and Al-Fayyad). Half diallel crosses was performed between them to obtain (21) individual hybrids. ...
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In order to study the combining ability and gene action for the yield and specific traits related to the grain quality of the genotypes of seven bread wheat (SK94, SK 95, Side 12, Side14, Giemiza 7, Giemiza 9, and Al-Fayyad). Half diallel crosses was performed between them to obtain (21) individual hybrids. Individually the hybrids were planted along with the parental lines in three replicates in randomised complete block design. Data for plant yield, protein ratio, wet gluten ratio, and dry gluten ratio were measured. Analysis of variance showed significant differences between the genotypes for all the evaluated traits. Parent Side 12 was distinguished by its general combining ability the traits of a plant yield, protein ratio, and wet gluten ratio, while the hybrid SK 95 x Side 12 was distinguished by a special combining ability all traits. The ratio between the components of the variance of general combining ability to the variance of specific combining ability was less than the correct one for all traits, and this is evidence of the effect of dominance variances on traits. Genetic variance was greater than environmental variance for all traits. Also, the dominance variance was greater than additive variance for all traits. The broad sense heritability rate was high for all traits, while the narrow sense heritability rate was medium for the plant yield trait and low for the other traits. The expected genetic advance was low in all traits. Therefore, selection is not useful, and it is possible to benefit from heterosis breeding method and selection in subsequent generations.
Suaad Muhammad Sheikh Abdulla; Dana Azad Abulkhaleq; Sherwan Ismail Towfiq
Volume 23, Issue 4 , December 2023, , Pages 58-73
Abstract
In this study, the hybridizations were done using partial diallel mating design in spring season 2020 at Qlyasan location to complete the procedure of this experiment, which conducted during spring season 2021 at two different locations in Sulaimani Governorate, Qlyasan and Kanipanka Using randomized ...
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In this study, the hybridizations were done using partial diallel mating design in spring season 2020 at Qlyasan location to complete the procedure of this experiment, which conducted during spring season 2021 at two different locations in Sulaimani Governorate, Qlyasan and Kanipanka Using randomized Complete Block Design (RCBD) with three replication. Eight pure lines of maize and their partial cross-hybrids were used by adopting a sample of three crosses for each line (MGW 16, NADH 102, NADH 704, NADH 706, NADH 52, ZY 52, NADH 905, MSI 4279). All genotypes (8 parents + 12 F1s hybrids) were prepared to chemical analysis for estimating oil%, protein% and fatty acids (Palmitic, Stearic, Linolic, Oleic, Linolenic and Oil). The results summarized as follow: The analysis of variance revealed that the mean square due to crosses and gca was highly significant for all studied traits, while for sca it was highly significant for most traits at both locations. The mean square due to the parents were highly significant for most studied traits. The cross NADH 52 × MSI 4279 and parent MSI 4279 showed gave highest means values for all traits. positive heterosis% for all traits was observed. The cross NADH 52 × MSI 4279 showed the highest heterosis% for all traits at both locations. The contribution of additive and non-additive gene effect was important in the inheritance of these traits at Qlyasan location, while at the Kani panka location the contribution of additive gene effect was more than non-additive gene effect for all traits. Highly significant correlation was recorded between each pair of fatty acids at both locations, but kernel yield recorded significant correlation with linolic and oleic acids at Kanipanka location only.
mohammed Al-Falahy; Kh. Al-Zubaidy; Kh. M. Al-Zubaidy; Kh. Kanosh
Volume 20, Issue 2 , December 2020, , Pages 16-25
Abstract
Six inbred lines of maize (ZP-595, DKC-6418, DK-17, ZP-694, Sgporo from panan and UN 4652) were included in a half diallel cross. The inbred lines and their 15 crosses were planted in the fields of the College of Agricultural Engineering Sciences, Duhok University on July 5, 2018, using randomized complete ...
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Six inbred lines of maize (ZP-595, DKC-6418, DK-17, ZP-694, Sgporo from panan and UN 4652) were included in a half diallel cross. The inbred lines and their 15 crosses were planted in the fields of the College of Agricultural Engineering Sciences, Duhok University on July 5, 2018, using randomized complete block design with three replications. The components of phenotypic variance and narrow sense heritability were estimated, and the regression line analysis method was adopted for the traits: number of days to silking, number of days to tasseling, plant height, upper ear height, leaf area, number of rows. ear-1, number of grains. row-1, grain yield. Plant-1, weight of 300 grains, and shelling percent. The results showed that the mean square of the genotypes (parents and hybrids) was highly significant for all traits. The regression coefficient of Wr on Vr appeared significant for all traits except leaf area, indicating the presence of epistasis in its inheritance. It is also evident that the variances, additive (D) and dominant components (H1 and H2) were significant from zero for all traits, indicating the importance of additive and non-additive gene action in the inheritance of these traits. It was shown from Wr, Vr regression line analysis that the regression line cutting the Wr axis above the origin point for number of days to silking, number of days to tasseling, plant height, upper ear height, leaf area, number of rows. ear-1 and shelling percent, an indication of the additive effect of genes with a decrease in dominance, while the regression line crossed the Wr axis under the origin point, for number of grains. Ear-1, grain yield. Plant-1 and shelling percent indicating the presence of over dominance with proportions of dominant and recessive genes in parents. The narrow sense heritability was low for number of rows. ear-1, number of grains. Ear-1, grain yield. Plant-1, 300 grains weight and shelling percent, moderate for upper ear height and leaf area and high for number of days to silking, number of days to tasseling and plant height.
