scholarly journals Genetic studies of yield and quality traits in aromatic rice genotypes through Hayman's approach

2019 ◽  
Vol 56 (4) ◽  
pp. 361-367
Author(s):  
Dilruba A Bano ◽  
S P Singh
Keyword(s):  
Plant Height ◽  
Grain Weight ◽  
Aromatic Rice ◽  
Quality Traits ◽  
Panicle Length ◽  
Partial Dominance ◽  
Yield And Quality ◽  
Diallel Mating Design ◽  
Days To Maturity ◽  
Rice Genotypes

Hayman's approach analysis was employed to estimate genetic components of variation in aromatic rice genotypes for yield and quality traits by following 8 x 8 one way diallel mating design. Vr-Wr graphs were plotted for the traits viz., days to 50 % flowering, days to maturity, plant height at maturity, main panicle length, effective tillers per plants, 100 grain weight and yield per plant, that exhibited significant deviation of regression coefficient 'b' from zero, irrespective of significance of 't2' or deviation of 'b' from unity. Vr-Wr graph revealed over dominance for the traits viz., plant height, main panicle length, effective tillers per plant and yield per plant. Traits like days to 50 % flowering, days to maturity and 100 grain weight revealed partial dominance. Graphical and component analysis revealed over dominance type of intra allelic interaction for most of the yield and yield contributing traits. However, both additive and dominance types of genetic effects were observed for most of yield and quality traits.

scholarly journals Genotype-environment interaction and stability analysis of four fine rice varieties

2012 ◽  
Vol 10 (1) ◽  
pp. 1-7
Author(s):  
P L Biswas ◽  
U K Nath ◽  
S Ghosal ◽  
A K Patwary
Keyword(s):  
Stability Analysis ◽  
Plant Height ◽  
Environmental Changes ◽  
Environment Interaction ◽  
Panicle Length ◽  
Rice Varieties ◽  
Stability Parameters ◽  
Panicle Number ◽  
Days To Maturity ◽  
Rice Genotypes

Genotype-environment interactions through different stability parameters and performance traits of four fine rice genotypes were studied. The traits were; days to 50% flowering, days to maturity, plant height (cm), number of effective tillers per hill, panicle length (cm), number of fertile grains per panicle, number of sterile grains per panicle and yield (t/ha) in four fine rice genotypes across nine environments along with experimental farm of Genetics and Plant Breeding department, Bangladesh Agricultural University (BAU) Mymensingh. Significant differences were observed for genotypes, environments and genotypes–environment interaction. Stability analysis after Eberhat and Russell’s model suggested that the genotypes used in study were more or less responsive to environmental changes. Most of the genotypes performed better in Comilla. BAU125 was found stable for effective tillers per hill and comparatively less sensitive to other genotypes in panicle length and number of sterile grains per panicle. BR5 was stable for days to maturity and plant height whereas Kalizira performed better than other genotypes for fertile grains per panicle. In general, only the genotype BAU125 was found stable for effective tillers per hill, panicle length and lowest number of sterile grains per panicle.   DOI: http://dx.doi.org/10.3329/jbau.v10i1.12011   J. Bangladesh Agril. Univ. 10(1): 1–7, 2012  

Assessment of Variability of Foxtail Millet [Setaria italica (L.) Beauv.] Genotypes

2020 ◽  
Vol 7 (2) ◽  
pp. 51-61
Author(s):  
Manoj Kandel ◽  
Suk Gurung ◽  
Narayan Dhami ◽  
Jiban Shrestha
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Morphological Traits ◽  
Foxtail Millet ◽  
Leaf Length ◽  
Grain Weight ◽  
Panicle Length ◽  
Thousand Grain Weight ◽  
Leaf Blast ◽  
Days To Maturity

Analysis of genetic diversity and variability is an initial step for crop development in a plant breeding program. Thirty foxtail millet genotypes were evaluated for their ten agro-morphological traits viz. grain yield, days to heading, days to maturity, plant height, leaf length, leaf width, number of nodes per tiller, panicle length, thousand-grain weight, and leaf blast during April to August season of 2018 at Kabre, Dolakha, Nepal. Clustering was done based on variability observed among the genotypes for all the ten traits by the average linkage method. The genotypes were grouped into six clusters. The shortest inter cluster distance between Cluster I and Cluster II was 17.63 and the longest was between Cluster IV and Cluster VI with 47.55. Cluster I had the maximum leaf blast score with the minimum leaf length. The Cluster II had the maximum grain yield and days to 50% heading and the number of nodes per tiller. The Cluster III was characterized by the maximum leaf length and leaf blast value. The genotypes grouped into the Cluster IV were characterized by the lowest value of days to 50% heading and 80% days to maturity and those of Cluster V had the maximum thousand-grain weight. The genotypes categorized into Cluster VI had the maximum plant height, leaf length, and panicle length. Cluster II and Cluster V were good because of their agro-morphological traits. The presence of a high level of diversity among the genotypes indicated their suitability for selection in crop breeding programs. Correlation analysis of genotypes having the maximum panicle length leaf area and higher plant height and shorter maturity period are pre-requisite for improvement in grain yield.

scholarly journals Agro-morphological Variation in 71 Traditional Rice Cultivars in Sri Lanka

2019 ◽  
pp. 1-16
Author(s):  
A. L. Ranawake ◽  
M. J. Hewage ◽  
N. G. J. Pradeepika ◽  
G. W. D. K. Jayasinghe
Keyword(s):  
Sri Lanka ◽  
Plant Height ◽  
Grain Weight ◽  
Total Biomass ◽  
Rice Cultivars ◽  
Panicle Length ◽  
Days To Maturity ◽  
Final Yield ◽  
Traditional Rice ◽  
Panicle Weight

Traditional rice cultivars in Sri Lanka have diverse characteristics that prove the excellent potential for utilizing them for varietal improvement. Seventy-one Sri Lankan traditional rice cultivars obtained from Plant Genetic Resources Center, Gannoruwa, Sri Lanka were used for diversity analysis. Data were collected in the middle-row-plants of each replicate and altogether 80 plants were evaluated in four replicates of each cultivar. Data were collected on 11 parameters in two consecutive Maha seasons in 2012-2014. According to the standard evaluation system of international rice research institute, 67% rice cultivars were tall, and 66% were low tillering. There was no any rice cultivar with high and good reproductive tillers/plant. Around 55% rice cultivars were partially sterile and 43% were fertile. The shortest days to maturity was recorded in Gonabaru (62 days) and the longest days to maturity was recorded in Vellainellu (105 days). The variation of agro-morphological characteristics was broad in studied rice cultivars: The recorded highest yield was 22.74 g/plant while the lowest was 1.55 g/plant. The hundred-grain-weight ranged from 3.49-1.27 g and the plant height ranged from 95-192 cm. The recorded highest number of total tillers per plant was 10 and the lowest was 3. Panicle length and panicle weight were ranged from 13-32 cm and 0.36-4.69 g consecutively. The smallest grains were in Herath and the largest grains were in Mudaliwi. The heaviest above ground biomass was achieved by Kallurundoivellai and its harvest index was the least (0.09). The highest filled grain percentage (91.48%) was recorded by Galpa Wee. The correlation analysis revealed that the yield per plant was significantly correlated with panicle weight, the total number of spikelets/panicle and number of fertile spikelets/panicle. There was no correlation between panicle length and the final yield of rice though panicle length was correlated with plant height and panicle weight. Total number of spikelets/panicle, the number of fertile spikelets/panicle, and plant height were significantly correlated with panicle weight. None of the parameters were correlated with hundred grain weight. Total biomass was correlated with plant height, the total number of spikelets, and fertile spikelets per panicle. There was no significant correlation between the biomass of rice with the final yield, however, a number of fertile tillers were correlated with a number of total tillers. Eleven parameters were sorted into four principal components that explained 87.44% of total variance and cluster analysis categorized the rice cultivars into six clusters at rescaled cluster distance 10 in Ward's linkage analysis.

scholarly journals Inheritance of some quantitative traits in the hybrid generations ‘Kuboyar × Gagat’

2021 ◽  
pp. 9-16
Author(s):  
P. I. Kostylev ◽  
E. V. Krasnova ◽  
G. A. Sirapionov
Keyword(s):  
Plant Height ◽  
Quantitative Traits ◽  
Grain Weight ◽  
Panicle Length ◽  
Rice Varieties ◽  
Partial Dominance ◽  
Kernel Length ◽  
Allelic Differences ◽  
White Grain ◽  
1000 Grain Weight

Rice is an important food for humans. In the world, for food purposes white-grain rice varieties are mainly used, but there are varieties in which kernel pericarp is of red, brown, purple or black color. Such rice is more beneficial for health promotion. The current paper has presented the results of genetic analysis of the inheritance of a number of variable quantitative traits in rice hybrid populations of the first and third generations obtained by the hybridization of the varieties ‘Kuboyar’ and ‘Gagat’. The variety ‘Kuboyar’ is medium-sized, with a compact erect panicle, an oval caryopsis and white pericarp. The variety ‘Gagat’ is tall, with a long drooping panicle, a long kernel and black pericarp. The work was carried out on the territory of the OP ‘Proletarskoe’ of the Rostov region in 2018–2020. The analysis of the inheritance of some quantitative traits that have a direct impact on the rice productivity made it possible to establish new inheritance regularities. According to the trait ‘plant height’ there has been identified partial dominance of the largest values of the trait in the hybrids F2 and F3. Allelic differences of 3 pairs of genes were identified in parental forms. The trait ‘panicle length’ showed overdominance of the trait in F2, it was absent in F3, and there were digenic differences in parental forms. The trait ‘number of spikelets per panicle’ demonstrated overdominance of large values and positive transgression. According to the trait ‘1000-grain weight’, the hybrids of both generations were split by the digenic scheme in a ratio of 1:4:6:4:1. There was no dominance in the trait ‘kernel length’; the initial varieties had differences in 2 pairs of genes. According to the trait ‘kernel width’, there was identified incomplete dominance of smaller values, and there was monohybrid split. There have been selected the best plants F3 with a black pericarp, average values of the traits ‘plant height’, ‘panicle length’, ‘1000-grain weight’ and an increased number of grains per panicle for the further breeding process.

scholarly journals Genetic interrelationship among yield and its components in rice hybrids

2019 ◽  
Vol 48 (4) ◽  
pp. 1207-1213
Author(s):  
Md Jamil Hasan ◽  
M Umma Kulsum ◽  
Shaikh Jafar Mohiuddin ◽  
Md Zahid-AL-Rafiq
Keyword(s):  
Plant Height ◽  
Direct Effect ◽  
Rice Yield ◽  
Grain Weight ◽  
Path Coefficient ◽  
Panicle Length ◽  
Spikelet Sterility ◽  
Significant Positive Association ◽  
Days To Maturity ◽  
1000 Grain Weight

The present investigation was conducted to elucidate the interrelationship among various yield and yield contributing traits. Among the traits plant height, days to 50% flowering, days to maturity, filled grain per panicle and spikelet sterility showed high genotypic variance. Effective tillers per hill, filled grain per panicle, spikelet sterility had high genotypic coefficient of variation with high heritability and high genetic advance per cent of mean. Effective tillers per hill, panicle length, filled grain per panicle and 1000-grain weight exhibited significant positive association with grain yield. Path coefficient analysis also revealed that plant height, effective tillers per hill, panicle length and 1000-grain weight had higher direct effect on rice yield (t/ha). Days to 50% flowering, days to maturity and spikelet sterility possessed moderate to low negative direct effect on rice yield. All together with the genetic variability, correlation and path analysis revealed that plant height, effective tillers per hill, panicle length, filled grain per panicle and 1000-grain weight were the most important yield component in rice hybrids.

scholarly journals Pertumbuhan dan Produktivitas 5 Varietas Unggul Baru Padi di Lahan Bukaan Baru Kabupaten Boven Digoel

2021 ◽  
Vol 23 (1) ◽  
pp. 6
Author(s):  
Fajriyatus Shoidah ◽  
Adnan Adnan
Keyword(s):  
Soil Fertility ◽  
Plant Height ◽  
Block Design ◽  
Grain Weight ◽  
Panicle Length ◽  
Randomized Complete Block Design ◽  
1000 Grain Weight

<p>New wetlands field generally has low productivity, so a technology is needed for improve productivity. New Superior Variety (NSV) is a technology that is considered easy to be adopted by farmers, so knowing a NSV that is able to adapt to the characteristics and conditions of new wetlands field is a must. The study of adaptive NSV on new wetlands field in Boven Digoel Regency is still limited so that the NSV recommendation for farmers is also still limited. The purpose of this study was to examine the growth and production of new superior varieties on the new wetlands fields in Boven Digoel Regency. The study was conducted on new wetlands in Asiki Village, Jair District during April-August 2019. Randomized Complete Block Design was employed with 3 replications using Inpari 36, Inpari 37, Inpago Rindang 1, Inpago Rindang 2 dan Inpara 8. The results showed different varieties perform different agronomy characters observed (plant height, number of tillers, panicle length, number of grains per panicle, filled grain, per panicle, empty grain per panicle and 1000 grain weight). Inpari 37 produced 5.3 ton/ha Dried Unhulled Rice, the highest production compared to other varieties, so that it could potentially be developed in Boven Digoel’s new wetlands field. Productivity may still be increased by improving soil fertility conditions.</p>

scholarly journals ESTIMATING VARIABILITY, HERITABILITY, AND GENETIC ADVANCE OF RICE GENOTYPES IN MID-HILLS OF NEPAL

2021 ◽  
Vol 22 (2) ◽  
pp. 92
Author(s):  
Sashi Lamichhane ◽  
Nav Raj Adhikari ◽  
Bishwas K.C. ◽  
Sapana Thapa
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Coefficient Of Variation ◽  
Grain Weight ◽  
Flowering Plant ◽  
Genetic Advance ◽  
Panicle Length ◽  
Breeding Programs ◽  
Significant Difference ◽  
Improvement Programs

<p>Rice is an essential staple food in Nepal but researches and varietal improvement programs are rarely carried out due to inadequate variability study. The field study was carried to diagnose the influence of genetic and environmental factors on yield traits to aid future rice breeding programs. Twelve genotypes were arranged in randomized complete block design with three replications from July to November 2019 at the research field of the Institute of Agriculture and Animal Science, Tribhuvan University, in the hilly area of Nepal. Analysis of variance showed significant difference for days to 50% booting, days to 50% flowering, plant height, panicle length, flag leaf area, filled grains per panicle, unfilled grains per panicle, fertility percentage, effective tillers m<sup>-2</sup>, straw yield, grain yield, 1000-grain weight, and harvesting index indicating the presence of variation in genotypes. LPN BR-1615 was the most promising genotype in grain yield. The values of Phenotypic Coefficient of Variation (PCV) were higher than Genotypic Coefficient of Variation (GCV) for each trait and low difference between them was found for days to 50% booting, days to 50% flowering, plant height, panicle length, grain yield, thousand-grain weight, fertility percentage, and harvesting index. Plant height, effective tillers m<sup>-2</sup>, and grain yield showed high heritability (i.e. 93.2%, 60.5% and 92.6%, respectively) and higher genetic advance as percentage of mean (i.e. 46.5, 34.6 and 50.1, respectively) . Thus, the experiment revealed that selections favoring plant height, effective tillers m<sup>-2</sup>, and grain yield would help in effective breeding programs of rice in future.</p>

scholarly journals Yield contributing characters of BRRI dhan49 as influenced by integrated use of banana leaves with inorganic potassium fertilizer

2020 ◽  
Vol 8 (2) ◽  
pp. 272
Author(s):  
Md. Abdul Mannan ◽  
Md. Abul Hashem ◽  
Md. Sohanur Rahman ◽  
Fakhar Uddin Talukder ◽  
Md. Kamrujjaman
Keyword(s):  
Plant Height ◽  
Grain Weight ◽  
Growth And Yield ◽  
Panicle Length ◽  
Potassium Fertilizer ◽  
Science Field ◽  
Straw Yield ◽  
Grain Yields ◽  
Banana Leaves ◽  
1000 Grain Weight

A field experiment was carried out at the Soil Science Field Laboratory of Bangladesh Agricultural University (BAU), Mymensingh during aman season of 2014 to study the integrated use of banana leaves with inorganic potassium fertilizer on the growth and yield of BRRI dhan49 following Randomized Complete Block Design (RCBD) with eight treatments and three replications. The highest plant height (85.55cm), panicle length (21.46cm), number of effective tillers hill-1 (11.54), number of filled grains panicle-1 (149.53), 1000-grain weight (21.85gm), grain yields (5.66 t ha-1) and straw yield (6.81 t ha-1) were obtained in the treatment T3 and the lowest plant height (77.10cm), panicle length (18.85cm), number of effective tillers hill-1 (8.64), number of filled grains panicle-1 (112.11), 1000-grain weight (19.96gm), grain yields (3.50 t ha-1) and straw yield (4.73 t ha-1) were recorded in the control. It can be recommended to integrated use of 50% K from banana leaves+50% K from MoP on growth and yield of BRRI dhan49.   

scholarly journals Comparing Correlation Coefficients and Path Analysis in Different Populations of Rice (Oryza sativa L.)

2020 ◽  
pp. 1-11
Author(s):  
Anjani Kumar ◽  
D. N. Singh ◽  
Krishna Prasad ◽  
Avinash Pandey
Keyword(s):  
Path Analysis ◽  
Plant Height ◽  
Harvest Index ◽  
Oryza Sativa L ◽  
Grain Weight ◽  
Path Coefficient ◽  
Panicle Length ◽  
Biomass Harvest ◽  
Different Populations ◽  
Positive Effect

This study performed to determine the correlation, their comparison and path coefficients of yield and yield contributing characters by using F2 (BPT-5204 /IR-64Drt1) their two parents separately and the joint parental populations. In this study, the computations for testing the significance of the difference between the 15 traits of different populations of rice determined from 324 F2, 9 IR-64Drt1 (P1), 9 BPT-5204 (P2) and 18 joint parental population. Results showed that the correlation of F2 indicated that the number of total tillers per plant, number of panicles per plant, plant height, panicle length, biomass, harvest index and yield per panicle were positive and significant association with yield per plant. Correlation of IR-64Drt1 stated that the plant height, panicle length, biomass and harvest index were positive and significant association with yield per plant. Correlation of BPT-5204 shown that the secondary branches per panicle and hundred-grain weight exhibited positive and significant association with yield per panicle. Correlation of the joint parent indicated that the plant height, panicle length, grain length, grain width, hundred-grain weight, biomass, harvest index and yield per panicle had exhibited positive and significant association with yield per plant. Path coefficient analysis indicated that harvest index had the highest direct positive effect (0.582) on yield per plant in the F2 population. However, the panicles per plant had the highest direct positive effect (1.481) on yield per plant IR-64Drt1 population. The total tillers per plant had the highest direct positive effect (1.821) on yield per plant in BPT-5204 population. In the joint population of BPT-5204 and IR-64Drt1, path analysis of yield components revealed that the biomass had the highest direct positive effect (0.658) on yield per plant. Information obtained in this study revealed that traits, the harvest index, biomass and panicles per plant are suggested as selection indices for grain yield improvement at segregating populations of rice.

scholarly journals Genetic divergence analysis in basmati rice genotypes (Oryza sativa L.) for agro-morphological and quality traits using multivariate approach

2021 ◽  
Vol 58 (1) ◽  
pp. 1-7
Author(s):  
Vinod Kumar ◽  
Dhirendra Singh
Keyword(s):  
Genetic Divergence ◽  
Amylose Content ◽  
Oryza Sativa L ◽  
Grain Weight ◽  
Basmati Rice ◽  
Quality Traits ◽  
Grain Length ◽  
Cluster Distance ◽  
Rice Genotypes ◽  
1000 Grain Weight

Genetic diversity of 30 basmati rice genotypes was analysed based on nine agro-morphological and six quality traits. The results of the principal component analysis showed that the first six principal components explained 89.16% of the total variation in the experimental material. These 30 basmati genotypes were grouped into six clusters which indicated the presence of sufficient diversity among the tested genotypes. Cluster I and cluster III was found to be the largest comprising of 10 genotypes each followed by cluster II having seven genotypes. The highest average intra-cluster distance was observed in cluster III. Highest inter-cluster distance (D2) was observed between clusters III and VI followed by clusters III and V, III and IV & clusters II and III. Cluster II showed high mean value for grain yield per plant, 1000 grain weight, and grain length. The characters viz., amylose content, grain length after cooking, spikelet per panicle, grain width, grain length and 1000 grain weight contributed maximum towards total genetic divergence, suggest their suitability of selection.

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