Selection for Grain Yield in Bread Wheat Under Normal Irrigation and Drought Stress Conditions.

Mahdy, E.E.; El-Karamity, A.; Mokadem, Sh.; Abdel-Mawgood, Ahmed L.; Fouad, Hassan

doi:10.21608/jpp.2015.49578

Cited by 4 publications

(15 citation statements)

References 10 publications

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“…These results indicate that pedigree selection was effective in detecting the high yield families. These results agree with those reported by Salous et al (2014), Mahdy et al (2015), Abd El-Rady (2017) and Khames et al (2017). The average correlated genetic gains showed significant increase over the bulk sample for no.…”

Section: Observed Direct and Correlated Response Of The Studied Traitssupporting

confidence: 94%

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Direct and Indirect Selection for Grain Yield in Bread Wheat (Triticum aesitivum L.)

Fouad

EL-ASHMOONY

El-Karamity

et al. 2020

Journal of Plant Production

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Direct and indirect selection for grain yield through 1000grain weight, spikelet fertility and spike density were achieved in bread wheat at the Exper. Farm Fac. Agric., Minia Univ. Egypt during the three successive seasons of 2016/17 to 2018/19. After two cycles of pedigree selection phenotypic variation of grain yield/plant, 1000grain weight, spikelet fertility and spike density decreased rapidly from F2 base population to F4. Indirect selection through high 1000 grain weight resulted in the highest grain yield/plant (23.62g) followed by direct selection for grain yield/plant (20.66 g). Average direct gain for the ten selected families of direct selection for grain yield showed highly significant increase in percentage of the bulk sample of 62.95% and the better parent of 39.25%. Pedigree selection was effective in detecting the high yielding families. Family No. 145 gave significant (P≤0.01) grain yield in percentage of the better parent and bulk sample by 77.09 and 107.23%, respectively. Average direct response in percentage of the bulk sample was significant and reached 21.08% for 1000 grain weight, 31.12% for spikelet fertility and 7.27% for spike density. Three families; No. 15, No. 72 and No. 153 surpassed significantly the bulk sample by 33.83, 43.01 and 29.28%, respectively, when selection practiced for 1000 grain weight. Family No. 145 considered to be a promising line in grain yield and spikelet fertility. High strong positive genotypic correlation was found between grain yield with each of weight of spikes/plant (0.81), no. of grains/spike(0.71), weight of grains/spike (0.91), 1000grain weight(0.92) and spikelet fertility(0.70).

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Section: Observed Direct and Correlated Response Of The Studied Traitssupporting

confidence: 94%

“…This refers to presence enough variation for further cycles of selection for these traits. Similar results were obtained by Mahdy et al (2015) and Khames et al (2017).…”

Section: Evaluation Of the 2 Nd Cycle Of Pedigree Selection F4generasupporting

confidence: 91%

Direct and Indirect Selection for Grain Yield in Bread Wheat (Triticum aesitivum L.)

Fouad

EL-ASHMOONY

El-Karamity

et al. 2020

Journal of Plant Production

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“…Ismail et al (1996) noted that one cycle of selection for GY started in the F5 was better than three cycles started in the F3 generation. Mahdy (2017) found that the observed genetic gain of the one cycle of selection from the F4 generation under both drought stress and normal irrigation environments was mostly better than three cycles started from F2 generation. Therefore, most of plant breeders and research centers delay selection for yield to the F5 generation after the plants reached acceptable level of homozygosity.…”

Section: Introductionmentioning

confidence: 93%

“…Talebi et al (2009) found that gain from indirect selection under moisture stress would improve yield in moisture stress better than selection from non-moisture stress environment. Ali (2011), , , Mahdy et al (2015) and Mahdy (2017) found that the observed genetic gain in grain yield under drought stress was better than under normal irrigation. In some cases, the genetic gains for single trait selection could generate adverse effects on the correlated traits (Hanson 1991and Collins et al 1997.…”

Section: Introductionmentioning

confidence: 98%

“…After two cycles of selection, Zakaria et al (2008) achieved observed genetic gain in GY/P of 7.62 and 7.54 % of the better parent under normal and late plantings, respectively. Single trait selection for GY in bread wheat was effective (Mahdy 1988, Pawar et al 1990, Ismail 1995and 2001, Ahmed 2006, El-Karamity et al 2007, Khan et al 2007, Ali 2011and Mahdy 2017. Talebi et al (2009) found that gain from indirect selection under moisture stress would improve yield in moisture stress better than selection from non-moisture stress environment.…”

Section: Introductionmentioning

confidence: 99%

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Multiple traits selection in bread wheat under drought stress and normal irrigation

Mahdy

2020

SVU-International Journal of Agricultural Sciences

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The genetic materials were F2, F3, F4 and F5 generations of the cross "Giza164/Sids4" of bread wheat. The experiments were conducted under drought stress and normal irrigation. Three cycles of single trait selection for grain yield/plant (GY/P) and five models of desired gain selection index (combinations from seven traits) were achieved in both environments separately. After the third cycle of selection, the selected families for the six types of selection under drought stress, and the selected families under normal irrigation were evaluated under both environments. The GCV in GY/P decreased from the F2 to the F5. The remained variability in GY/P for the five selection indices was higher after the three cycles of selection than the single trait selection for GY/P. Heritability estimates as calculated from regression of F5/F4 generations for the traits under selection pressure were higher under drought stress than under normal irrigation except few cases. The observed gain increased from index1 to index5, and all indices were better in improving GY/ P than direct selection for GY/P. It could be concluded that selection index was better in improving grain yield than single trait selection for GY/P. Furthermore, selection under drought stress (antagonistic selection) in these materials was better than selection under normal irrigation (synergistic selection) in improving GY/P either selection evaluated under drought stress or under normal irrigation. Selection index5 which involved GY/P, 100GW and NG/S was the best index in improving GY/P.

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Selection of yield and its components in bread wheat under old and new land conditions in Upper Egypt

Salous,

Abdel-Latif,

AbdEL- kader

2023

Egyptian Journal of Agricultural Research

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Improving wheat's tolerance to environmental stress is of utmost importance in the current era due to climatic changes. This study was carried out to determine the relative merits of pedigree selection for grain yield per plant on old and new land. To quantify the response of selection, two cycles of pedigree selection for grain yield per plant were applied to a segregating population of bread wheat crosses (Misr 3 Line #1) in F3 and F4 generations under new land stress conditions. The F5-selected families were evaluated in both old and new land habitats after the second cycle. Under both circumstances, the genotypic variance was much less than the phenotypic variance, and it generally decreased from the F3-generation to the F5-generation. Furthermore, compared to the old land environment, broad-sense heritability estimates for grain yield plant-1 were lower in the new land environment. After Cycle 1 and Cycle 2, the realized heritability in old land was 52.03 and 84.52 percent, respectively, compared to 34.08 and 62.80 percent in new land. In both cases, the instant reaction to selection that was found on ancient soil was examined, and the results showed a significant increase in grain production from both the bulk and the best parent of 5.40 and 5.02 percent and 17.28 and 7.03 percent, respectively. Selected families for grain yield under new land that were studied under both conditions revealed negligible increases of 12.29 and 2.80 percent from the bulk and considerable increases of 28.24 and 22.34 percent from the better parent, under new and old land, respectively. The results indicate these genotypes could be used as sources of tolerance or factors contributing to general adaptation. Furthermore, selection for grain yield/plant under new land stress was superior to selection under old land stress, regardless of whether selection entries were evaluated under stress or non-stress.

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Selection for Grain Yield in Bread Wheat Under Normal Irrigation and Drought Stress Conditions.

Cited by 4 publications

References 10 publications

Direct and Indirect Selection for Grain Yield in Bread Wheat (Triticum aesitivum L.)

Direct and Indirect Selection for Grain Yield in Bread Wheat (Triticum aesitivum L.)

Multiple traits selection in bread wheat under drought stress and normal irrigation

Selection of yield and its components in bread wheat under old and new land conditions in Upper Egypt

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