CHARACTER ASSOCIATION IN F4 GENERATION OF RICE (Oryza sativa L.)

Rai, P. K.; Sarker, Umakanta; Roy, Pravas Chandra; Islam, Aminul

doi:10.3329/bjpbg.v26i2.23848

Cited by 28 publications

(18 citation statements)

References 4 publications

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“…Furthermore, in contrast to our results, they reported a significant positive correlation between PL and GP. Similar to the results of current work, a significant positive correlation between PH and PL was found by Hossain et al, (2015) and Kishore et al, (2015) while, Rai et al, (2015) reported it significant, but negative. According to our observations and in agreement with Hossain et al, (2015), the correlation between GW and GP was significant and positive while, Kishore et al, (2015) reported it significantly negative.…”

Section: Conventional and Sequential Path Analysissupporting

confidence: 81%

Correlation and Path Coefficient Analysis of Morphological Traits Affecting Grain Shape in Rice Genotypes (Oryza Sativa L.)

Kiani¹,

Agahi²

2016

AgricultForest

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SUMMARYThis work was undertaken to look into the interrelationships among morphological traits and rice grain shape. For this purpose, a set of 25 rice genotypes was sown and subjected to a farm survey, based on the standard evaluation system for rice. Correlation coefficient analysis showed that the grain shape was positively correlated with grain length, panicle length, plant height and the number of tillers while, there were statistically significant and negative correlations between grain shape with maturity date, number of grains per panicle, grain breadth, 100-grain weight and flag leaf width. Sequential path analysis revealed that grain breadth, grain length and number of grains per panicle, as first-order variables, was responsible for about 98% of the variation in grain shape. Also, 100-grain weight, maturity date, number of tillers and flag leaf width were determined as second-order predictors.Amongst second-order predictors, 100-grain weight was a noteworthy trait regarding its high direct and indirect effects on grain breadth and grain length. Study of multicollinearity measures revealed that sequentializing of predictor variables reduced problems due to multicollinearity leading to a better understanding of the interrelationships among the various traits and their relative contribution. Also, the bootstrap analysis indicated that all direct effects were significant.The results suggested that grain breadth, grain length and number of grains per panicle, as first-order predictor variables had the highest direct effect on grain shape and could be used as a selection criterion to improve rice grain shape. Also, 100-grain weight, maturity date, number of tillers and flag leaf width, as second-order predictor variables affect the rice grain shape indirectly through their effects on first-order predictors. The authors recommend for the use of sequential equation modeling to conduct a proper sequential path analysis. Keywords INTRODUCTIONRice appearance is a character considered as one of the main quality attributes by consumers therefore, measuring and understanding factors influencing rice grain appearance is a great challenge for industries and breeders in meeting consumer preferences (Haider et al., 2014). In genetics, grain shape has been widely accepted as a complex trait controlled by multiple genes with small effects (Yin et al., 2015). Thus, understanding the complexities governing the relationships among traits leads to increased selection gain in breeding programs. In this regard, correlation coefficients, multiple linear regression and path analysis are some of the common statistical methods. Determination of correlation coefficients is an important statistical procedure to examine the relationship between traits. However, increase of the number of independent variables controlling a particular dependent variable can lead to increased interdependence. In such situation, correlations may be insufficient to explain the associations in a way that will enable breeders to decide on a direct or indir...

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Section: Conventional and Sequential Path Analysissupporting

confidence: 81%

Correlation and Path Coefficient Analysis of Morphological Traits Affecting Grain Shape in Rice Genotypes (Oryza Sativa L.)

Kiani¹,

Agahi²

2016

AgricultForest

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“…The real genetic difference in yield and its components between genotypes are expected and found also by Anis et al (2016b); Prasad et al (2015) and Rai et al (2015).…”

Section: B Effect Of Genotypessupporting

confidence: 64%

physical and Physicochemical Properties for Selected Hybrid Rice Combinations Derived from Three Line System

Anis¹,

Gharib²

2016

Journal of Plant Production

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Ten hybrid rice genotypes were evaluated during 2015 and 2016 rice growing seasons at the Experimental Farm of the Rice Research and Training Center (RRTC), Sakha, Kafrelshiekh, Egypt. The experiments were assessed to study Physical and physicochemical properties of rice hybrids grain and heritability with genetic advance which is more helpful in predicting the quality under selection than heritability estimates alone. Combined analysis was performed for data over the two years. Most of studied characters were significantly greater in 2015 than in 2016 season except the duration, grain yield and appearance quality of rice. Highly significant differences were observed among the genotypes for all studied traits. G46A/WTR1 genotype followed by G46A/LH1 produced the highest grain yield. All the hybrid combinations have medium grain shape (< 3.0 ratio) except for G46A/IR04A132 (slender > 3.0 ratio). The hybrid IR69625A/WAB6-125 recorded higher milling yield (70.5%). The hybrid G46A/IR43 showed less broken rice (6.8 %) followed by G46A/HHZ5-Y3-Y1-DT1 (8.1%). All hybrid combinations were intermediate for gelatinization temperature except for IR69625A/CT19021-3-4 was high. Amylose content % of all genotypes ranged from 21.6 to 25.7%. The interaction between genotypes and years had a non-significant effect except for 1000-grain weight and head rice recovery. The estimates of heritability were high for all traits except for gelatinization temperature and ranged from 71.05% to 99.95%. The presence of high heritability values indicates the effectiveness of selection on the basis of phenotypic performance. Grain L/W ratio (95.52% and 26.57%), head rice recovery (99.84% and 21.03%) and elongation ratio (71.05% and 34.09%) recorded high heritability and high genetic advance, respectively. Significant positive phenotypic correlation was found between grain yield and days to maturing (0.635), number of panicles per plant (0.655) and grain width (0.

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“…The analysis of variance revealed a wide range of variability of the studied traits regarding selected drought-tolerant leafy vegetable amaranths. A wide range of variability was also reported in red and green color amaranth (33), rice (42)(43)(44)(45)(46)(47)(48)(49)(50)(51)(52)(53)(54)(55)(56), maize (57)(58)(59), and coconut (60,61). The lowest moisture content was noted in the salt-tolerant vegetable amaranth genotypes LS9 and LS7.…”

Section: Discussionmentioning

confidence: 99%

Bioactive Components and Radical Scavenging Activity in Selected Advance Lines of Salt-Tolerant Vegetable Amaranth

et al. 2020

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Four selected advance lines of salt-tolerant vegetable amaranth were evaluated for proximate, nutraceuticals, pigments, phytochemicals, and antioxidants components antioxidants activity in completely randomized block design (RCBD) design in three replicates. Salt-tolerant vegetable amaranth contained adequate carbohydrates, protein, moisture, and dietary fiber. The remarkable contents of iron, manganese, copper, zinc, sodium, molybdenum, boron, potassium, calcium, magnesium, phosphorus, sulfur, betacyanins, betalains, betaxanthins, chlorophylls, ascorbic acid, polyphenols, flavonoids, and antioxidant potentiality were found in salt-tolerant vegetable amaranth. The genotypes LS7 and LS9 had abundant proximate, nutraceuticals, pigments, phytochemicals, and antioxidants compared to the genotypes LS3 and LS5. Salt-tolerant vegetable amaranth demonstrated high content of flavonoid compounds including flavonols such as rutin, kaempferol, isoquercetin, myricetin, hyperoside, and quercetin; flavanol, such as catechin; flavone such as apigenin; and flavanone, such as naringenin. For the first time, we identified one flavonol such as myricetin; one flavanol, such as catechin; one flavone such as apigenin; and one flavanone, such as naringenin in salt-tolerant vegetable amaranth. Across six flavonols, rutin and quercetin were identified as the most prominent compounds followed by isoquercetin and myricetin in selected salt-tolerant vegetable amaranths. Across the genotypes, LS7 exhibited the highest flavonols such as rutin, kaempferol, isoquercetin, myricetin, hyperoside, and quercetin as well as the highest flavanols, such as catechin; flavones such as apigenin; and flavanones, such as naringenin. It revealed from the correlation study that antioxidant components of salt-tolerant vegetable amaranth genotypes exhibited good radical quenching capacity of 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) and 2,2-diphenyl-1-picrylhydrazyl equivalent to Trolox. The two genotypes LS7 and LS9 of vegetable amaranth containing excellent sources of proximate, nutraceuticals, pigments, phytochemicals, and antioxidants components could be used as potent antioxidants to attaining nutrients and antioxidant sufficiency in the saline prone area of the globe. We can extract colorful juice from the genotypes LS7 and LS9 as drink purposes for consuming the nutraceuticals and antioxidant deficient community in the saline prone area around the world. However, further detail experimentation is required to confirm the standardization and stabilization of functional components of vegetable amaranth for extraction of juice as drinks.

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CHARACTER ASSOCIATION IN F4 GENERATION OF RICE (Oryza sativa L.)

Cited by 28 publications

References 4 publications

Correlation and Path Coefficient Analysis of Morphological Traits Affecting Grain Shape in Rice Genotypes (Oryza Sativa L.)

Correlation and Path Coefficient Analysis of Morphological Traits Affecting Grain Shape in Rice Genotypes (Oryza Sativa L.)

physical and Physicochemical Properties for Selected Hybrid Rice Combinations Derived from Three Line System

Bioactive Components and Radical Scavenging Activity in Selected Advance Lines of Salt-Tolerant Vegetable Amaranth

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