Influence of Deficit Irrigation at Silking Stage and Genotype on Maize (Zea mays L.) Agronomic and Yield Characters

Al-Naggar, A; Atta, M; Ahmed, M; Younis, Adnan

doi:10.9734/jaeri/2016/25438

Cited by 7 publications

(7 citation statements)

References 24 publications

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“…These traits could be considered as selection criteria for drought tolerance in maize if they proved high heritability and highpredicted genetic advance from selection. This conclusion is in accordance with other investigators [5,10,[26][27][28][31][32][33][34] for agronomic and yield traits. The significant and negative genetic correlation between grain yield and both ASI and BS under water stress and non-stress, indicated the importance of these two traits in tolerance to drought stress.…”

Section: Discussionsupporting

confidence: 93%

“…Significant and positive r-values detected between GYPP of genotypes and plant height in WSG and WSF environments indicated that taller plants of genotypes are of high yielding, under drought conditions. This conclusion is in agreement with others [26][27][28]. In contrast, other investigators [36,37] reported that taller genotypes are higher yielding than shorter genotypes under both WW and WS conditions.…”

Section: Discussionsupporting

confidence: 93%

“…Significance of G×T mean squares in the present study indicated that means of studied traits of genotypes varied with water supply, confirming previous results [23,24]. Significance of G×S×T mean squares for 11 out of 14 traits indicated that genotype performance differ from one combination of season x treatment to another combination and that the rank of maize genotypes differ from irrigation regime to another, and from one season to another and the possibility of selection for improved performance under a specific water stress for almost all studied agronomic and yield traits as proposed by Al-Naggar et al [5,[25][26][27][28].…”

Section: Discussionmentioning

confidence: 96%

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Heritability and Correlations for Agronomic and Physiologic Traits of Maize under Deficit Irrigation at Two Growth Stages

Al-Naggar¹,

Shafik²,

Elsheikh³

2019

AJBGMB

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Strong associations between agronomic and physiologic traits and drought tolerance, high heritability and high genetic advance for such traits would allow plant breeder to use such traits as selection criteria for selecting drought tolerant genotypes. The objectives of the present investigation were: (i) to explain the relationships between the drought tolerance index (DTI) and 14 agronomic and physiologic traits of 22 maize genotypes and (ii) to estimate the broad-sense heritability (h2b) and genetic advance (GA) from selection for such traits, in order to determine the selection criteria for DTI. A two-year experiment was carried out using a split plot experiment with three replications. The main plots were devoted to irrigation regimes, i.e. well watering (WW), water stress at flowering (WSF) and at grain filling (WSG), and sub plots to maize genotypes. It is evident from results that the best selection criteria for drought tolerance in our study were: 100-kernel weight (100KW) and chlorophyll concentration index (CCI) under WSF and WSG, anthesis-silking interval (ASI), upper stem diameter (SDU) and lower stem diameter (SDL) under WSF and kernels/row (KPR) and ear leaf area (ELA) under WSG, since they show high correlation (r) values with grain yield/plant (GYPP), high h2b and high GA estimates under the respective environments. Under well watering conditions, KPR, 100KW, CCI, and SDL traits showed high (r) values, high h2b and high GA estimates and therefore could be considered selection criteria for GYPP under non-stressed environment. The results concluded that predicted selection gain would be higher if selection was practiced under WW for lower values of days to silking and higher values of ears/plant, rows/ear, KPR, 100KW, SDU and SDL, under WSF for lower values of ASI and higher values of GYPP and under WSG for lower values of plant height, ear height, and barren stalks, and higher values of CCI and ELA.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 96%

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Heritability and Correlations for Agronomic and Physiologic Traits of Maize under Deficit Irrigation at Two Growth Stages

Al-Naggar¹,

Shafik²,

Elsheikh³

2019

AJBGMB

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“…Briefly, under normal condition heritability in broad sense was higher than under water stress condition for 100-grain weight, while heritability in broad sense under water stress it was higher than under normal condition for grain yield per plot. Similar results for both traits, (Al-Naggar et al (2016) found that heritability was increased in stressful environments. In contrast, Worku (2005) reported a decrease in heritability under stressed environments.…”

Section: Estimation Of Specific Combining Ability (Sca)supporting

confidence: 76%

Line × Tester Analysis for Yield and 100-grain Weight Under Normal and Water Stress Conditions in Yellow Maize (Zea mays L.)

El-Hefny

Allah

Ibrahim

et al. 2020

AJAS

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Maize (Zea mays L.) is the third most important cereal grain in Egypt (after wheat and rice) but it is vulnerable to water stress which causes lead losses in both yield and quality. In the current study we evaluated 100 S1-lines along with their top-crosses using two testers under normal and water stress conditions. We used line × tester to assess general (GCA) and specific (SCA) combining ability effects for 100-grain weight and grain yield per plot; In addition, we estimated heritability for both traits. Result of line × tester analysis showed highly significant differences among parents, crosses vs parents., In addition, between testers and lines × testers for both traits under normal and water stress condition. The results, lines showed non-significant for 100-grain weight under normal and water stress condition. Grain yield per plot showed non-significant differences under normal condition while it showed significant under water stress condition. Under normal condition, S1-lines 56 and 88 possessed the highest 100-grain weight while, the highest values of 100-grain weight were found in cross combinations including S1-line 29 × SC162 and S1-line 61× TWC352. On the other hand, S1-lines 65 and 68 possessed the highest grain yield per plot while, the highest values of grain yield per plot were found in cross combinations including S1-line 86 × SC162 and S1-line 37× TWC352. Under normal condition, S1-lines 10 and 99 displayed positive and significant GCA effects for 100-grain weight while, S1-line 86 and 55 exhibited the maximum GCA effect for grain yield per plot. Top-crosses including S1-line 29×SC162 and S1-line 75×TWC352 were good specific combiners for 100-grain weight while, the top-crosses including S1-line 29×SC162 and S1-line 78×TWC352 were good specific combiners for grain yield per plot. Heritability in broad sense showed moderate highly estimates for both traits. Our results indicated the preponderance of dominance gene action in controlling both aforementioned traits. In conclusion, these S1-lines are promising to produce drought tolerant inbred line in the future, which may lead to produce drought tolerant hybrid.

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“…Mean squares due to the 2 nd order interaction, i.e., G×S×T, were significant (P ≤ 0.01) for all studied traits, except for RPE, SDU and ELA (Table 2), indicating that genotype performance differ from a combination of season x treatment to another combination and that the rank of maize genotypes differ from irrigation regime to another, and from one season to another and the possibility of selection for improved performance under a specific water stress for most studied agronomic and yield traits as proposed by Al-Naggar et al [24][25][26][27][28][29][30].…”

Section: Analysis Of Variancementioning

confidence: 99%

The Effects of Genotype, Soil Water Deficit and Their Interaction on Agronomic, Physiologic and Yield Traits of Zea mays L.

Al-Naggar

Shafik

Elsheikh

2018

ARRB

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The presence of genotypic differences in performances under soil water deficit would help plant breeders in initiating successful breeding programs to improve drought tolerance. The objectives of the present study were: (i) to assess the effects of genotype, water stress and their interaction on maize agronomic, physiologic and yield traits and (ii) to identify drought tolerant genotypes for use in future breeding programs. Fifteen commercial hybrids and seven breeding populations were evaluated in the field for two seasons under water stress at flowering (WSF) and grain filling (WSG) compared to well watering (WW). A split plot design with three replications was used. Data analysed across seasons revealed a significant reduction in grain yield/plant (28.69 and 20.26%), grain yield/ha (35.53 and 25.51%), chlorophyll concentration index (30.18 and 44.07%) and 100kernel weight (6.75 and 12.36%) due to water stress under WSF and WSG, respectively, a significant reduction in ears/plant (11.58%), kernels/row (14.23%), kernels/plant (24.85%) due to water stress under WSF and in upper stem diameter (18.46%) due to water stress under WSG, but a significant increase in days to silking (3.50%), anthesis silking interval (21.17%) and barren stalks Original Research Article

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Influence of Deficit Irrigation at Silking Stage and Genotype on Maize (Zea mays L.) Agronomic and Yield Characters

Cited by 7 publications

References 24 publications

Heritability and Correlations for Agronomic and Physiologic Traits of Maize under Deficit Irrigation at Two Growth Stages

Heritability and Correlations for Agronomic and Physiologic Traits of Maize under Deficit Irrigation at Two Growth Stages

Line × Tester Analysis for Yield and 100-grain Weight Under Normal and Water Stress Conditions in Yellow Maize (Zea mays L.)

The Effects of Genotype, Soil Water Deficit and Their Interaction on Agronomic, Physiologic and Yield Traits of Zea mays L.

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