Gene Action and Genetic Improvement of Parental Lines in Hybrid Rice for Developing New Hybrids

Awad-Allah, Mamdouh M. A.; Elekhtyar, Nehal M.; Said, Manal M.; Abdein, Mohamed A.; Shams, Sahar A.M.

doi:10.3923/jas.2022.55.67

Cited by 3 publications

(1 citation statement)

References 18 publications

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“…Broken rice% is significantly reduced with nano fertilizers, which can improve the nutrition of the plant, enhance the efficient use of nutrition, and protect cultivated plants from different environmental stresses [90]. Increased protein content in the grain is due to an increase in the nitrogen content and increases the dry weight of the grain [91][92][93]. Because silicon provides additional nutrients such as nitrogen to the plant, it has a significant impact on boosting rice's protein content [45].…”

Section: Discussionmentioning

confidence: 99%

Effect of Foliar Application of Phosphorus, Zinc, and Silicon Nanoparticles along with Mineral NPK Fertilization on Yield and Chemical Compositions of Rice (Oryza sativa L.)

Elekhtyar

AL‐Huqail

2023

Agriculture

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The traditional techniques of adding fertilizers to soil have a number of drawbacks in regard to the availability of nutrients for plants. The foliar application of nanoparticles causes them to be absorbed easily, and consequently, this is the most efficient method of dealing with nutritional deficiencies, reducing rice disease, and enhancing crop production and quality. Moreover, by using less fertilizer on the soil, it minimizes environmental pollution and improves the efficiency of nutrient utilization. In order to assess the impact of foliar applications of phosphorus, zinc, and silicon nanoparticles (PNPs, ZnNPs, and SiNPs) combined with mineral nitrogen, phosphorus, and potassium (NPK) fertilizers as a basal application on the Egyptian Giza 179 rice variety, a field experiment was carried out in two consecutive growing seasons: 2019 and 2020. With four replications, a Randomized Complete Block Design was applied, which included N165:P36:K60 (Recommended NPK; 165 Urea: 36 P2O5: 60 K2O kg ha−1); N110:P24:K40 (2/3 NPK); 2/3 NPK+ PNPs1000; 2/3 NPK+ PNPs3000; 2/3 NPK+ PNPs5000; 2/3 NPK+ ZnNPs25; 2/3 NPK+ ZnNPs50; 2/3 NPK+ ZnNPs100; 2/3 NPK+ SiNPs50; 2/3 NPK+ SiNPs100; 2/3 NPK+ SiNPs200; and N0:P0:K0. Results indicated that the grain yield (10.05 and 9.79 t ha−1) and straw yield (13.68 and 12.45 t ha−1) in the 2019 and 2020 seasons, respectively, as well as the yield attributes, chemical compositions in the plant, and milling characteristics, were significantly altered by the application of 2/3 NPK+ Zn50NPs without any significant difference in comparison to the N165P36K60 treatment. Moreover, 2/3 NPK+ P3000NPs and 2/3 NPK+ Si200NPs recorded positive effects on all studied characteristics. The findings of this study will be useful for future investigations, including the use of nanofertilizers in rice.

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Section: Discussionmentioning

confidence: 99%

Effect of Foliar Application of Phosphorus, Zinc, and Silicon Nanoparticles along with Mineral NPK Fertilization on Yield and Chemical Compositions of Rice (Oryza sativa L.)

Elekhtyar

AL‐Huqail

2023

Agriculture

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Development of New Iso-Cytoplasmic Rice-Restorer Lines and New Rice Hybrids with Superior Grain Yield and Grain Quality Characteristics by Utilizing Restorers’ Fertility Genes

Awad-Allah

Attia

Omar

et al. 2022

Genes

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This research was carried out at the Experimental Farm of Sakha Agricultural Research Station, Sakha, Kafr El-Sheikh, Egypt, during the 2018–2020 rice-growing seasons to develop and evaluate four iso-cytoplasmic rice-restorer lines: NRL79, NRL80, NRL81, and NRL82, as well as Giza 178, with ten new hybrids in order to estimate genotypic coefficient, phenotypic coefficient, heritability in a broad sense, and advantage over Giza 178 as a check variety (control) of new restorer lines. This study also estimated combining ability, gene action, better-parent heterosis (BP), mid-parent heterosis (MP), and standard heterosis (SH) over Egyptian Hybrid 1 (IR69A × Giza 178) as a check hybrid (control) for grain yield, agronomic traits, and some grain-quality characters in restorer lines and hybrids. The percentage of advantage over commercial-variety Giza 178 (check) was significant, and highly significant among the newly developed restorer fertility lines for all the studied traits. This indicates that the selection is a highly effective factor in improving these traits. New restorer fertility lines showed highly significant positive values over commercial restorer for grain yield; the values ranged from 51% for NRL80 to 100.4% for NRL82, respectively. Meanwhile, in regard to the grain shape of paddy rice, three lines of the promising lines showed highly significant negative desirable values compared with Giza 178; the values ranged from −7.7% for the NRL80 to −15.2% for NRL79, respectively. Based on the superiority of the new lines, the new lines can be used as new restorer fertility lines to breed promising new hybrids and new inbred rice lines or varieties. From the results of the testcross experiment, the four promising lines were identified as effective restorer fertility lines for two cytoplasmic male sterile (CMS) lines. Moreover, the six rice hybrids showed values for SH heterosis of grain yield/plant of more than 15% over the check hybrid variety, with high values of 1000-grain weight and desirable grain shape; these hybrids were G46A × NRL81 (125.1%), G46A × NRL80 (66.9%), IR69A × NRL79 (47.2%), G46A × NRL79 (24.6%), IR69A × NRL81 (23.4%), and IR69A × NRL82 (16.2%).

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Combining Ability and Gene Action Controlling Agronomic Traits for Cytoplasmic Male Sterile Line, Restorer Lines, and New Hybrids for Developing of New Drought-Tolerant Rice Hybrids

Awad-Allah

Attia

Omar

et al. 2022

Genes

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This study aimed to identify new rice lines and hybrids that are tolerant to water deficit and produce high yields under water stress conditions. A line × tester mating design was used to study the lines and testers’ general combining ability (GCA) effects. The specific combining ability (SCA) of the hybrid rice combinations was measured under three different irrigation regimes; 6, 9, and 12 days. The study was carried out at the experimental farm of Sakha Agricultural Research Station, Sakha, Kafr El-Sheikh, Egypt, during the 2018 and 2019 rice growing seasons. Due to the genotypes and their partitions to the parents and the crosses, the mean squares were highly significant for all studied traits under the three irrigation regimes. The additive gene effects play an important role in expressing most of the studied traits. Therefore, the selection procedures based on the accumulation of the additive effect would be successful at improving these traits and the grain yield. The cytoplasmic male sterile (CMS) line G46A (L1) was the best combiner for most yield component traits in the three irrigation regimes. The newly devolved restorer lines T11, T1, T2, T5, T4, and T3, as well as the new hybrids L2 × T10, L2 × T6, L1 × T7, L1 × T5, L1 × T3, L2 × T7, L2 × T9, L2 × T8, L2 × T4, L1 × T4, L2 × T2, L1 × T8, L1 × T9, and L2 × NRL 10, showed good, desirable values of the studied traits such as earliness of flowering, short plant height, number of panicles/plant, panicle length, number of spikelets/panicle, number of filled grains/panicle, panicle weight, 1000-grain weight, hulling percentage, milling percentage, head rice percentage, and grain yield under the irrigation regimes of 6, 9, and 12 days. The hybrids L2 × T10, L2 × T6, L1 × T7, and L1 × T5, showed significant positive SCA effects for grain yield, under all three irrigation regimes.

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Gene Action and Genetic Improvement of Parental Lines in Hybrid Rice for Developing New Hybrids

Cited by 3 publications

References 18 publications

Effect of Foliar Application of Phosphorus, Zinc, and Silicon Nanoparticles along with Mineral NPK Fertilization on Yield and Chemical Compositions of Rice (Oryza sativa L.)

Effect of Foliar Application of Phosphorus, Zinc, and Silicon Nanoparticles along with Mineral NPK Fertilization on Yield and Chemical Compositions of Rice (Oryza sativa L.)

Development of New Iso-Cytoplasmic Rice-Restorer Lines and New Rice Hybrids with Superior Grain Yield and Grain Quality Characteristics by Utilizing Restorers’ Fertility Genes

Combining Ability and Gene Action Controlling Agronomic Traits for Cytoplasmic Male Sterile Line, Restorer Lines, and New Hybrids for Developing of New Drought-Tolerant Rice Hybrids

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