Studies on genetic variability for floral and grain quality traits in rice (<i>Oryza sativa</i> L.)

Priyanka, R.; Thiyagarajan, K.; Bharathi, S. Pechiappan; Rajendran, R.

doi:10.5958/0975-928x.2017.00092.8

Cited by 3 publications

(5 citation statements)

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“…High PCV and GCV values and high genetic advances were recorded for these traits, suggesting further improvement of lines for these characteristics for further selection and subsequent use in the breeding program. Similar results were also reported by [ 54 , 55 , 56 , 57 , 58 , 61 , 63 ]. In general, heritability along with genetic advances can be useful in the selection program.…”

Section: Discussionsupporting

confidence: 92%

“…Analysis of variance showed highly significant differences between all genotypes for all the studied traits ( Table 2 ), which indicates that each genotype is genetically different from the other for yield, its components, floral traits, and grain quality, indicating that there is variability among the studied lines and they would respond positively to selection. The set of genotypes used in the current study indicated that there were statistically significant differences between them among all the traits that were studied, and these results were consistent with the findings of [ 54 , 55 , 56 , 57 , 58 ].…”

Section: Discussionsupporting

confidence: 88%

“…Moreover, the genetic advance in percentage (expected) of mean was moderate for days to 50% of heading, panicle length, 1000-grain weight (g), and filament length, while low genetic advances in percentage (expected) of mean were observed for spikelet fertility percentage, hulling percentage, and milling percentage. Similar results were observed by [54,55,58,61,63,64].…”

Section: Phenotypic Genotypic Coefficient Of Variation and Genetic Ad...supporting

confidence: 90%

“…Similar results were reported by [ 65 ] for days to 50% heading, plant height, panicle length, number of filled grains per panicle, 1000-grain weight, and [ 66 ] for days to 50% heading, number of filled grains per panicle, 1000-grain weight, and grain yield per plant. See [ 54 , 55 , 58 , 63 ] for anther length, anther breadth, filament length, duration and of floret opening.…”

Section: Discussionmentioning

confidence: 99%

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Development of New Restorer Lines Carrying Some Restoring Fertility Genes with Flowering, Yield and Grains Quality Characteristics in Rice (Oryza sativa L.)

Awad-Allah

Elekhtyar

El-Abd

et al. 2022

Genes

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This study was carried out using 22 promising restorer lines of rice and their parental lines to study genetic variability and genetic advance for yield and yield-associated grain quality traits and floral traits. These genotypes are evaluated in a replicated trial using Randomized Complete Block Design (RCBD) with three replications at the Experimental Farm of Sakha Agricultural Research Station, Sakha, Kafr El-Sheikh, Egypt, during the seasons from 2012 to 2020. Analysis of variance revealed that highly significant variations were observed among the genotypes for all the studied characters. Both GCV% and PCV% were high for the number of spikelets per panicle, the number of filled grains per panicle, and panicle weight. The genetic advance in the percentage of mean was high for days to plant height, panicle length, number of spikelets per panicle, number of filled grains per panicle, panicle weight, grain yield per plant, anther length, anther breadth, duration of floret opening, and head rice percentage. Mean performance of the rice genotypes indicated that the genotypes NRL 59, NRL 55, NRL 62, NRL 63, NRL 66, and NRL 54-2 were promising for grain yield and associated desirable traits. Thus, some of these promising lines can be promoted as a new rice variety and could be used as a source for developing new hybrid combinations in hybrid rice breeding programs. The percentage of advantage over better parent and Giza 178 as the commercial variety was significant and there were highly significant desirable values among the genotypes for all the studied traits in the two years, indicating that the selection is effective in the genetic improvements for these traits.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionsupporting

confidence: 88%

Section: Phenotypic Genotypic Coefficient Of Variation and Genetic Ad...supporting

confidence: 90%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Development of New Restorer Lines Carrying Some Restoring Fertility Genes with Flowering, Yield and Grains Quality Characteristics in Rice (Oryza sativa L.)

Awad-Allah

Elekhtyar

El-Abd

et al. 2022

Genes

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“…High heritability along with high GAM was recorded by all traits except leaf length and leaf breadth. Similar results were observed by Khan and Muthuswamy (1969), Khan et al (1970), Gobade et al (2017), Priyanka et al (2017) and Tuppad et al (2017) moderate heritability and moderate GAM could be exploited through the manifestation of dominance and epistatic components through heterosis in bhendi (Yassin and Anbu, 1997).…”

Section: Genetic Variability In Mysuru Jasminesupporting

confidence: 75%

Genetic variability in Mysuru jasmine (Mysuru mallige): A GI crop of Mysuru

2022

EJPB

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At the college of Horticulture, Mysuru, Karnataka, the study was conducted during 2018 kharif using RBD with two replications. Quantitative characters namely petiole length, leaf length, leaf breadth, bud length, bud breadth, flower diameter, flower stalks length or pedicel length, calyx length, the number of sepals/ calyx teeth, the number of whorls, the number of petals, petal length, the number of stamens, length of the anther, length of the filament, length of the style, length of the stigma, length of the corolla tube and flower bud weight were recorded. High (>20%) genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV) was observed for bud length, bud breadth, the number of whorls, the number of petals, pedicel length, length of corolla tube, length of filament, length of style, length of stigma and flower bud weight. Moderate (10 to 20%) GCV and PCV were observed for petiole length, leaf length, leaf breadth, flower diameter, calyx length, the number of calyx teeth, petal size and the number of stamen and length of the anther. The phenotypic co-efficient of variation was more than the genotypic co-efficient of variation for all characters studied. The higher (>20%) values of genetic advance over mean (GAM) coupled with very high (>80%) estimates of heritability were observed for characters viz., bud length, bud breadth, flower diameter, calyx length, the number of calyx teeth, the number of whorls, the number of petals, petal size, pedicel length, length of the corolla tube, the number of stamens, length of anther, length of the filament, length of the style, length of the stigma and flower bud weight. Moderate heritability (40-60%) with low GAM was observed for petiole length. The variance due to genotypes was highly significant for all the characters except for length of the leaf.

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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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Studies on genetic variability for floral and grain quality traits in rice (Oryza sativa L.)

Cited by 3 publications

References 0 publications

Development of New Restorer Lines Carrying Some Restoring Fertility Genes with Flowering, Yield and Grains Quality Characteristics in Rice (Oryza sativa L.)

Development of New Restorer Lines Carrying Some Restoring Fertility Genes with Flowering, Yield and Grains Quality Characteristics in Rice (Oryza sativa L.)

Genetic variability in Mysuru jasmine (Mysuru mallige): A GI crop of Mysuru

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

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