scholarly journals Character Association Studies in Lowland Rice Cultivars of Bihar

2020 ◽  
pp. 31-39
Author(s):  
Nitesh Kushwaha ◽  
Ravi Kant ◽  
Rajesh Kumar ◽  
.` Nilanjaya ◽  
Digvijay Singh ◽  
...  
Keyword(s):  
Grain Yield ◽  
Association Studies ◽  
Block Design ◽  
Main Axis ◽  
Lowland Rice ◽  
Panicle Length ◽  
Root Volume ◽  
Yield Improvement ◽  
Grain Length ◽  
Improvement Programs

The present investigation was carried out with aim to deduce the association among different characters with grain yield, i.e. their mutual relation with help of correlation analysis as well as to identify the component trait which are directly or indirectly contributing to the yield. The experiment was carried out at Rice Breeding Section, Pusa, Samastipur in kharif, 2018 from June, 26 to December 28. Total of twenty-two lowland rice accessions were sown in Randomized complete Block design Fashion (R.C.B.D.), with three replications. Fifteen characters including grain yield were observed for the experiment and data was collected at respective stages. The correlation coefficient analysis revealed that grain length, root volume, panicle length of main axis, number of panicles per hill, showed positive significant correlation with grain yield per plant. Hence, emphasis should be given to these traits in selection process during yield improvement programs. Grain length, root volume, panicle length of main axis and leaf length showed high direct effect on grain yield per plant. Hence, selection based on these characters would be more effective for yield improvement.

scholarly journals Genetic Variability Assessment in Lowland Rice Cultivars of Bihar, India

2020 ◽  
pp. 39-46
Author(s):  
Nitesh Kushwaha ◽  
Ravi Kant ◽  
Rajesh Kumar ◽  
Nilanjaya . ◽  
Digvijay Singh ◽  
...  
Keyword(s):  
Grain Yield ◽  
Coefficient Of Variation ◽  
Leaf Length ◽  
Main Axis ◽  
Grain Weight ◽  
Genetic Advance ◽  
Panicle Length ◽  
Root Volume ◽  
High Heritability ◽  
1000 Grain Weight

The present investigation for various genetic parameters was done for twenty-two lowland rice genotypes in R.C.B.D. with three replications at Rice Breeding Section, Pusa Farm, Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur, Bihar. Analysis of variance revealed significant differences (P-value =0.01) among genotypes for all the characters. Brasali was the highest yielder suggesting that it can be used for crossing programme for improvement in yield. The phenotypic variance was higher than corresponding genotypic variances for all the characters studied. Genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV) were highest for grain yield per plant followed by1000 grain weight, plant height, number of panicles, root volume, leaf length and days to 50 % flowering revealing that sufficient variability was present in the gene pool for these characters. Thus, there is ample scope for genetic improvement of these traits through selection. The broad sense heritability ranged from 23 % (panicle length of main axis) to 97% (1000 grain weight). High heritability was obtained for most of the characters except for panicle length of main axis and kernel width. High heritability accompanied with high genetic advance as percent of mean was recorded for days to 50% flowering, plant height, root volume, number of panicles, 1000 grain weight, leaf length and grain yield per plant. High values of GCV, PCV, heritability and genetic advance as percent of mean observed for various characters indicate that these traits can be used as selection indices for yield improvement.

scholarly journals Exploring the Relationship between Yield and Yield Attributing Traits in Advanced Breeding Lines of Rice (Oryza sativa L.)

2021 ◽  
pp. 350-358
Author(s):  
Danish Mushtaq ◽  
Bupesh Kumar ◽  
Praveen Singh ◽  
Manmohan Sharma ◽  
Ashish Sheera
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Coefficient Of Variation ◽  
Oryza Sativa L ◽  
Association Studies ◽  
Block Design ◽  
Phenotypic Expression ◽  
Panicle Length ◽  
Rice Varieties ◽  
Breeding Lines

Aim: Present study endeavors to explore the genetic variability for various agro-morphological and quality traits as well as to delineate the association between grain yield and its yield attributing components Study Design: Randomized Complete Block Design Place and Duration of Study: Division of Plant Breeding and Genetics, She-e-Kashmir University of Agricultural Sciences and Technology of Jammu during kharif 2020. Methodology: A experiment was carried out to determine the association between grain yield and yield attributing components among advanced breeding lines of rice to establish a well grounded selection criteria for developing rice varieties with improved grain yield. Phenotypic coefficient of variation (PCV) was found to be relatively greater than the genotypic coefficient of variation (GCV) for most of traits indicating role of environment in the phenotypic expression of traits. Characters viz., plant height, total number of tillers per plant, number of effective tillers per plant, panicle length and grain yield per plant exhibited high heritability coupled with high genetic advance indicating their efficient inheritance from preceding generations. Results: Association studies indicated that characters viz., Plant height, total number of tillers per plant, number of effective tillers per plant, panicle length, 1000 grain weight and grain yield per plant had a significant positive relationship with grain yield per plot indicating their role in breeding rice varieties for higher grain yield. Conclusion: Cause and effect relationship revealed that traits viz., days to 50 per cent flowering, total number of tillers per plant, days to maturity, panicle length and grain yield per plant can be exploited for indirect selection for improving grain yield.

scholarly journals Effect of Plant Spacing and Fertilizer Management on the Yield Performance of BRRI dhan39 under Old Brahmaputra Floodplain Soil

2017 ◽  
Vol 104 (.1-.4) ◽  
Author(s):  
Jahan S ◽  
◽  
Sarkar M A R ◽  
Paul S K
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Block Design ◽  
Inorganic Fertilizer ◽  
Recommended Dose ◽  
Cow Dung ◽  
Fertilizer Management ◽  
Panicle Length ◽  
Inorganic Fertilizers ◽  
Floodplain Soil

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh, Bangladesh from June to December 2015 to investigate the effect of spacing and fertilizer management on the yield of transplanted Aman rice cv. BRRI dhan39. The experiment comprised of five spacings viz. 25 × 5 cm, 25 × 10 cm, 25 × 15 cm, 25 × 20 cm, 25 × 25 cm and four fertilizer schedules viz. no manure and no fertilizer (control), recommended dose of inorganic fertilizer (80-60-40 kg N, P2 O5 , K2 O ha-1, respectively + 60 kg ha-1 gypsum + 10 kg ha-1 ZnSO4 ), 75% recommended dose of inorganic fertilizer + cow dung at 5 t ha-1, 75% recommended dose of inorganic fertilizer + poultry manure @ 2.5 t ha-1. The experiment was laid out in a Randomized Complete Block Design with three replications. Plant height (104.60 cm), number of total tillers hill-1 (11.03), panicle length (22.25 cm), grains panicle-1 (109.00) and grain yield (4.42 t ha-1) were found to be the highest in 25 × 15 cm spacing. Regarding nutrient management, 75% recommended dose of inorganic fertilizers + cow dung at 5 t ha-1 superseded other treatments in terms of plant height (107.50 cm), number of total tillers hill-1 (10.40), number of effective tillers hill-1 (7.68), panicle length (22.26 cm), grains panicle-1 (111.70) and grain yield (4.14 t ha-1). The control treatment (no manures and no fertilizers) gave the lowest values for all these parameters. The highest grain yield (4.57 t ha-1) was found in 25 × 15 cm spacing combined with 75% recommended dose of inorganic fertilizers + cow dung at 5 t ha-1 and the lowest grain yield (2.50 t ha-1) was found in 25 × 5 cm spacing combined with control (no manures and fertilizers). Therefore, 25 × 15 cm spacing combined with 75% recommended dose of inorganic fertilizers + cow dung at 5 t ha-1 appeared as the promising practice in transplant Aman rice cv. BRRI dhan39 cultivation.

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 Produksi Empat Varietas Padi Sawah yang Diberi Kombinasi Pupuk Bio-Slurry dan NPK

2019 ◽  
Vol 3 (1) ◽  
pp. 23
Author(s):  
Yafizham Yafizham ◽  
Dwi Retno Lukiwati
Keyword(s):  
Grain Yield ◽  
Negative Impact ◽  
Block Design ◽  
Organic Fertilizer ◽  
Animal Husbandry ◽  
Rice Paddy ◽  
Lowland Rice ◽  
Rice Varieties ◽  
Two Factors ◽  
Npk Fertilizer

<p>Non-organic agriculture has succeeded in increasing the production of lowland rice, but on the other hand also has a negative impact on the ecosystem of agriculture and the environment, such as the decreasing content of soil organic matter. One effort that can be done, is by adding bio-slurry organic fertilizer to the NPK fertilizer. This study was conducted to determine the effect of the combination of bio-slurry fertilizer and NPK fertilizer on the production of four rice paddy varieties. This research by experiment was conducted in Screen House Agrotechnopark, Faculty of Animal Husbandry and Agriculture, Diponegoro University, Tembalang Semarang campus, taking place from October 2018 to January 2019. The experiment used a randomized completely block design with two factors and three replications. The first factor was a combination of bio-slurry + NPK fertilizer ie without N (P0) fertilizer, NPK 550 kg ha<sup>-1</sup> fertilizer (P1), bio-slurry fertilizer 3 tons ha<sup>-1</sup> + NPK fertilizer 400 kg ha<sup>-1</sup> , 6 tons ha<sup>-1</sup> bio-slurry fertilizer + 250 kg ha<sup>-1</sup> NPK fertilizer, 9 tons ha<sup>-1</sup> bio-slurry fertilizer + 100 kg ha<sup>-1</sup> NPK fertilizer and 12 tons bio-slurry fertilizer ha<sup>-1</sup>. Whereas the second factor was the lowland rice varieties namely Inpari 23, Sultan Unsrat, Sintanur and Gilirang. The results of the variance analysis showed that the combination of bio-slurry + NPK fertilizer and lowland rice varieties had a very significant effect on grain yield per clump, number of filled grains, number of empty grains, total grain count, weight of 1000 grains, rice yield per pot and harvest index. The highest grain yield per clump (85.33 g) was obtained from the treatment of 550 kg ha<sup>-1</sup> NPK fertilizer, while the highest grain yield per clump (58.06 g) was obtained from the Gilirang variety (V4), the highest total grain amount (174.58 grains) was obtained from the treatment of NPK 550 kg ha<sup>-1</sup> and (212.28 grains) fertilizer produced by varieties Inpari 23. The highest yield per pot of rice (61.83 g) was obtained from the treatment of 550 kg ha<sup>-1</sup> NPK fertilizer , while the highest paddy rice varieties which produced rice per pot of (63.22 g) were Inpari 23.</p>

Association studies between quantitative and qualitative traits in rabi sorghum

2015 ◽  
Vol 49 (5) ◽  
Author(s):  
Rekha Chittapur ◽  
B. D. Biradar
Keyword(s):  
Grain Yield ◽  
Association Studies ◽  
Test Weight ◽  
Genetic Advance ◽  
Panicle Length ◽  
Gene Effects ◽  
Superior Genotype ◽  
Additive Gene ◽  
High Heritability ◽  
Panicle Weight

One hundred <italic>rabi</italic> sorghum germplasm lines of diverse origin were used to estimate genetic variability parameters such as heritability, genetic advance and correlation for 15 quantitative traits. The study was conducted under rainfed conditions during <italic>rabi</italic> season. High phenotypic coefficient of variation was observed for grain yield, panicle weight, panicle length, number of primaries and dead heart percentage. High heritability coupled with high genetic advance were observed for the characters days to flowering, dead heart percentage, panicle weight panicle length, number of primaries per panicle, test weight and grain yield per plant indicating that additive gene effects were operating for these traits and selection for superior genotype was possible to bring genetic improvement in desired direction. Grain yield had positive and highly significant association with plant height, panicle weight, number of primaries, panicle weight and test weight, whereas negative and highly significant correlation with seed fat content and protein content.

scholarly journals Analysis of Combining Ability in Rice Varieties for Quantitative Traits

2019 ◽  
Vol 11 (3) ◽  
pp. 436-439
Author(s):  
Ghaffar KIANI
Keyword(s):  
Grain Yield ◽  
Combining Ability ◽  
Agronomic Traits ◽  
Block Design ◽  
Rice Varieties ◽  
Gene Effects ◽  
Breeding Programs ◽  
Grain Length ◽  
Additive Gene Effects ◽  
Additive Gene

Rice is staple food in Iran. Despite of high quality of local rice, their grain yield is low. In hybridization breeding programs, selection of suitable parents is an essential role for developing new combinations with broadens genetic diversity. Combining ability of local rice varieties namely ‘Hashemi’, ‘Sang Jo’ and ‘Tarom Deylamani’ and ‘Nemat’ was evaluated in a partial diallele analysis for agronomic traits in a randomized complete block design at Sari Agricultural Sciences and Natural Resources University. General combining ability (GCA) and specific combining ability (SCA) variances showed predominated role of additive gene effects in the inheritance of grain length. Both additive and non-additive components of genetic variances were important in the inheritance of traits like grain yield, plant height, panicle length, total grains per panicle, grain length and grain length to width. However, non-additive gene effects were seen for tiller number. Results showed that ‘Nemat’ was the best general combiner for most of characters followed by ‘Tarom Deylamani’. The cross of ‘Hashemi’ × ‘Tarom Deylamani’ was suggested to exploitation of heterosis breeding for increasing yield and its components in rice breeding programs. 

RATOONED LOWLAND NERICA RICE VARIETIES AS AN OPTION FOR TRIPLE CROPPING IN INLAND VALLEYS OF DERIVED SAVANNAH IN NIGERIA

2012 ◽  
Vol 48 (4) ◽  
pp. 551-562 ◽  
Author(s):  
S. O. ADIGBO ◽  
M. O. OLOJEDE ◽  
P. J. C. HARRIS ◽  
O. AJAYI
Keyword(s):  
Grain Yield ◽  
Field Experiments ◽  
Block Design ◽  
Appropriate Technology ◽  
Lowland Rice ◽  
Rice Crop ◽  
Rice Varieties ◽  
Fluted Pumpkin ◽  
Inland Valley ◽  
Cropping Seasons

SUMMARYAlthough triple cropping in inland valleys of Nigeria is technically feasible, the third crop between the main crop and dry season non-rice crop has been considered not to be economically viable because of poor crop establishment due to soil inundation. The identification of an appropriate technology with low input, such as ratooning, would allow this niche to be utilized. Field experiments were conducted at the University of Agriculture, Abeokuta, Nigeria in 2007–2008 and 2008–2009 cropping seasons to evaluate the performance of the main and ratooned crops of lowland NERICA (New Rice for Africa) rice (Oryza sativa L.) varieties in a lowland rice–ratooned rice–fluted pumpkin (Telfairia occidentalis Hook F.) sequence. The experiment was laid out in a randomized complete block design with three replicates. The lowland rice varieties used were NERICA-L 19, NERICA-L 20, NERICA-L 22, NERICA-L 24, OFADA, NERICA-L 26, NERICA-L 41, NERICA-L 42, NERICA-L 44 and NERICA-L 47. The grain yield of the main rice crop ranged from 5.0 to 7.3 t ha−1 in 2007–2008 cropping season and from 4.1 to 9.1 t ha−1 in 2008–2009. The ratooned rice had a grain yield of 1.0–4.7 t ha−1 in 2007–2008 and 1.2–3.4 t ha−1 in 2008–2009. The total grain yield obtained in 2007–2008 from the main and ratooned rice crops in seven months was 6.7–11.6 t ha−1, while in 2008–2009 it was 5.3–2.6 t ha−1. The fresh leaf yield of fluted pumpkin ranged from 14.6 to 16.9 t ha−1 in 2007–2008 and from 18.3 to 19.8 t ha−1 in 2008–2009, similar to previously reported rainy season unfertilized yields. Thus, a ratooned rice crop appears to be a feasible technology capable of boosting rice production and consequently increasing the overall productivity of the inland valley in a rice–rice–vegetable cropping sequence.

scholarly journals Appearance of Some Black Rice Genotype (Oryza Sativa L.) In Two Type of Agroecosystems in the Dried Land of Central Lombok District

2019 ◽  
Vol 6 (5) ◽  
pp. 742
Author(s):  
L. Sofian ◽  
I Gusti Putu Muliarta Aryana ◽  
Kisman Kisman
Keyword(s):  
Grain Yield ◽  
Leaf Area ◽  
Plant Height ◽  
Environmental Changes ◽  
Block Design ◽  
Grain Weight ◽  
Panicle Length ◽  
Black Rice ◽  
Special Adaptation ◽  
Panicle Weight

The purpose of this study was to determine the appearance of black rice rice genotypes and their adaptation to two types of agroecosystems on dry land. The experiment used a randomized block design at each location with 3 replications and at each test 14 experimental plots were arranged. The treatment used 14 genotypes of black rice, namely: 2 elders (Situ Patenggang superior varieties and Baas Selem cultivars), and 12 lines of hope. Parameters observed were flowering age, plant height, number of productive and unproductive tillers per clump, leaf area, panicle length, number of filled grains and empty grains per panicle, weight of 100 grains, grain weight of each clump and grain yield. The results showed that there was no interaction between location and genotype on flowering age, plant height, number of productive tillers and unproductive tillers, panicle length, leaf area, number of filled grains per panicle, weight of 100 grains, grain weight per clump and grain yield , but interacts with the number of empty grains per panicle. The adaptation and stabilization test results showed that genotype G1 which was classified as stable which had general adaptation, and genotype classified as special adapted and very sensitive to environmental changes was G2; G3; G5; G6; G7; G8; G9; G10; G11; G13; and G14, whereas genotypes G4 and G12 are classified as special adaptation in marginal environments. Keywords: Location and genotype of black rice.

scholarly journals Performance of different rice hybrids in Krishna western delta

2020 ◽  
Vol 15 (3) ◽  
pp. 249-251
Author(s):  
K. Anny Mrudhula ◽  
B. Krishna Veni
Keyword(s):  
Field Experiment ◽  
Grain Yield ◽  
Plant Height ◽  
Yield Components ◽  
Growth Parameters ◽  
Block Design ◽  
Research Unit ◽  
Panicle Length ◽  
Straw Yield ◽  
Randomized Block Design

A field experiment was conducted at Rice Research Unit, Bapatla during Kharif, 2013 to observe the performance of hybrids under Krishna Western Delta. The experiment was laid out in Randomized Block Design with four replications. The treatments are 5 rice hybrids like DRRH2, DRRH3, KRH2, PA6201 and CRHR32. The results of study revealed that the hybrids exhibited superiority in respect of different growth parameters like plant height, number of tillers per hill, panicle length grain yield and straw yield. Among various tested rice hybrids, maximum grain yield (6408 kg/ha) and straw yield (7178 kg/ha) were recorded in PA6201 which might be due to better growth parameters and yield components of hybrids.

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