scholarly journals Heritability and Genetic Advance Estimates from the Parental Lines of Hybrid Maize (Zea Mays L.)

2021 ◽  
Vol 12 (1-2) ◽  
pp. 33-36
Author(s):  
T Biswas ◽  
MS Islam ◽  
NJ Methela
Keyword(s):  
Coefficient Of Variation ◽  
Agricultural Research ◽  
Block Design ◽  
Kernel Weight ◽  
Research Field ◽  
Parental Line ◽  
Research Station ◽  
Genetic Advance ◽  
Hybrid Maize ◽  
Number Of Seeds

Twenty-two genotypes of maize parental line were grown during 2017-2018 at the Research field of Plant Breeding Division, Regional Agricultural Research Station (RARS), Bangladesh Agricultural Research Institute (BARI), Rahmatpur, Barisal, Bangladesh. The experiment was laid out in randomized complete block design with three replications. Heritabilty, coefficients of variability and genetic advance values were computed for days to tasseling, days to silking, days to maturity, plant height (cm), ear height (cm), cob length (cm) and diameter (cm), number of seed rows per cob, number of seeds per row, number of seeds per cob, thousand grain weight (g) and yield (g/plant). Among all the traits higher phenotypic coefficient of variation (44.53) and genotypic coefficient of variation (44.18) were observed for yield/plant. The uppermost heritability was observed in case of yield per plant (98.41) followed by 1000 seed weight (96.91). Genetic advance was highest for seeds/cob (197.87) followed by 1000-kernel weight (176.86).Greater magnitude of heritability coupled with higher genetic advance in characters under study provided the evidence that these plant parameters were under the control of additive genetic effects. Indicating that selection should lead to a fast genetic improvement of the material. Environ. Sci. & Natural Resources, 12(1&2): 33-36, 2019

scholarly journals Genetic variability, correlation and path analysis of exotic and local hybrid maize (Zea mays L.) genotypes

2020 ◽  
Vol 6 (1) ◽  
pp. 8-15
Author(s):  
Nlima Ahmed ◽  
Abul Kashem Chowdhury ◽  
Md Saleh Uddin ◽  
Md Mainul Islam Rashad
Keyword(s):  
Agricultural Research ◽  
Path Coefficient ◽  
Research Station ◽  
Positive Contribution ◽  
Genetic Advance ◽  
Lattice Design ◽  
Wide Range ◽  
Ear Height ◽  
Hybrid Maize ◽  
Number Of Seeds

The genetic parameters, characters association and path coefficient analysis between yield and yield components of 32 exotic and local hybrid maize genotypes were studied at Plant Breeding division, Regional Agricultural Research Station (RARS), Bangladesh Agricultural Research Institute (BARI), Rahmatpur, Barisahl during rabi 2015 to 2016, following Alpha Lattice Design with three replications. All the characters showed significant differences among the genotypes except cob length indicating their wide genetic variation. The highest genotypic co-efficient of variation (11.48) observed in yield and lowest (1.72) was found in days to maturity. All of the characters exhibited moderate to high heritability in broad sense (h2b) coupled with a wide range of genetic advance and genetic advance in percentage of mean. Heritability ranged from 19.21 to 86.79 for cob length and thousand seed weight, respectively. Yield had a significant positive correlation with cob length, cob diameter, number of seeds per cob and number of rows per cob. Days to tasseling and number of seeds per cob make highest positive contribution toward yield. While, days to silking and ear height had highest negative direct effect on yield. The results indicated that ear height, number of rows per cob, thousand seeds weight and number of seeds per cob could be considered as selection criteria in maize breeding program. Asian J. Med. Biol. Res. March 2020, 6(1): 8-15

scholarly journals Effect of conservation agriculture on grain yield and income of maize under maize based cropping system in far western Nepal

2018 ◽  
Vol 10 (4) ◽  
pp. 320-332
Author(s):  
H.K. Prasai ◽  
S.K. Sah ◽  
A.K. Gautam ◽  
A.P. Regmi
Keyword(s):  
Grain Yield ◽  
Agricultural Research ◽  
Cropping Systems ◽  
Cropping System ◽  
Conservation Agriculture ◽  
Research Field ◽  
Research Station ◽  
Net Benefit ◽  
Maize Varieties ◽  
Hybrid Maize

Abstract. The adoption of Conservation agriculture (CA) contributes to sustainable production and its advantages include lower inputs and stable yields. This study was conducted in the research field of Regional Agricultural Research Station, Bhagetada, Dipayal, Doti during 2014 and 2015 to identify the effect of CA on grain yield and income of maize in Maize based cropping system. Both conservation and conventional agricultural (ConvA) practices were evaluated on two maize based cropping systems namely maize-wheat-mungbean (M-W-MB) and maize-lentil-mungbean (M-L-MB). For this purpose two maize varieties namely Raj Kumar and Arun-2 were used. The average productivity of maize under M-L-MB cropping system was 1.6% higher (5.75 t/ha) than M-W-MB cropping system (5.66 t/ha). The average grain yield of maize under CA was 16.7% higher (6.15 t/ha) than ConvA (5.27 t/ha). Rajkumar produced 43% higher average grain yield (6.73 t/ha) than Arun-2 variety (4.69 t/ha). The average net benefit was slightly higher (US$ 597.33/ha) under M-L-MB cropping system than M-W-MB cropping system (US$ 573.89/ha). Similarly, the average net benefit from CA was 102% higher (US$ 783.67/ha) than ConvA (US$ 386.79/ha). Rajkumar variety gave 127% higher average net benefit (US$ 813.49/ha) than Arun-2 (US$ 357.81/ha). The average benefit - cost (B:C) ratio of M-L-MB cropping system was slightly higher (1.72) than the average B:C ratio of M-W-MB cropping system (1.70). The average B:C ratio of CA was 42% higher (2.01) than ConvA (1.41). The average B:C ratio of Rajkumar variety was found 33% higher (1.95) than Arun-2 (1.46). The higher grain yield, net profit and B:C ratio were found in CA practices under M-L-MB cropping system and Rajkumar variety. This study suggests that hybrid maize planting and the adoption of M-L-MB cropping system should be used to increase grain yield and economic performance under CA practices.

Genetic Variability and Correlation Coefficients of Major Traits in Cold Tolerance Rice (Oriza sativa L.) Under Mountain Environment of Nepal

2019 ◽  
Vol 7 (4) ◽  
pp. 445-452
Author(s):  
Netra Hari Ghimire ◽  
Paras Mani Mahat
Keyword(s):  
Genetic Variability ◽  
Cold Tolerance ◽  
Agricultural Research ◽  
Environmental Influence ◽  
Block Design ◽  
Direct Selection ◽  
High Mountain ◽  
Research Station ◽  
Genetic Advance ◽  
Mountain Area

This study was conducted at Agricultural Research Station (ARS), Vijayanagar, Jumla Nepal comprising fifteen genotypes of cold tolerance rice during regular rice growing season of high hill in 2015 in RCBD (Randomized Complete Block Design)  with three replications to observe genetic variability, correlation, heritability, genetic advance and clustering of genotypes in relation to yield and yield associated traits and selection and advancement of early maturing, high yielding, disease resistant, and cold tolerance genotypes for high mountain area. Analysis of variance revealed that all characters except number of panicle per hill were significantly different indicating presence of variation in genetic constituents. Phenotypic coefficient of variance (PCV) was higher than genotypic coefficient of variance (GCV) for all the corresponding traits under study indicating environmental influence for the expression of the traits. Higher PCV and GCV value were obtained in grain yield (Yld), number of grain per panicle (NGPP) and number of panicle per hill (NPPH). Higher heritability coupled with higher genetic advance (GA) was obtained in NGPP, NPPH and Yld, high heritability and medium GA was obtained in thousand grains wt (TGW), plant height (Pht) and panicle length (PL) indicating additive gene action indicating direct selection may be a tool for varietal development. Positive and significant correlation was obtained between all characters except DM and Pht, PL and PHT and TGW and PPH. Total three clusters were obtained in eighty percent euclidean similarity clustering indicating genetic closeness/distances among the genotypes. Culture 1 carries the superior five genotypes including NR-10638-B-B-4 and NR-10695-B-B-B. Int. J. Appl. Sci. Biotechnol. Vol 7(4): 445-452

scholarly journals Genetic Variability and Path Analysis of Groundnut (Arachis hypogaea L.)

1970 ◽  
Vol 9 (1-2) ◽  
pp. 29-36 ◽  
Author(s):  
MA Zaman ◽  
M Tuhina-Khatun ◽  
MZ Ullah ◽  
M Moniruzzamn ◽  
KH Alam
Keyword(s):  
Genetic Variability ◽  
Plant Height ◽  
Seed Yield ◽  
Agricultural Research ◽  
Block Design ◽  
Positive Association ◽  
Research Station ◽  
Genetic Advance ◽  
Days To Maturity ◽  
Positive Direct

An experiment was conducted at the Research farm of Regional Agricultural Research Station, BARI, Hathazari, Chittagong during Rabi season (December to April), 2009-2010 for estimation of genetic variability, genetic parameters and correlation coefficient among different yield components in a randomized block design with three replications. Thirty four groundnut genotypes were tested in the experiment. Highly significant variations were observed among the genotypes for all the characters studied. The highest genetic coefficient of variation was observed for karnel yield per hectare, followed by karnel yield per plant, branches per plant, immature and mature nuts per plant, 100 kernal weight and plant height. The highest heritability was observed in karnel yield per pant (95.08%), followed by karnel yield per hectare (94.38%), 100 kernal weight (87.01%), immature and mature nuts per plant (82.24%, 80.32%), branches per plant (79.54%) and 100 nut weight (78.98%), while high values of genetic advance were obtained in all the characters except days to maturity and days to 50% flowering. The seed yield per plant showed the highly significant and positive association with nut size, number of nuts per plant, karnel size and days to 50% flowering. The number of mature nuts per plant had high positive direct effect on seed yield per hectare followed by nut size, shelling percentage, days to 50% flowering and days to maturity. Therefore, branches per plant, plant height, nuts per plant, nut size, karnel size, days to 50% flowering, shelling percentage and days to maturity were identified to be the important characters which could be used in selection for yield. Keywords: Genetic variability; heritability; genetic advance; groundnut DOI: http://dx.doi.org/10.3329/agric.v9i1-2.9476 The Agriculturists 2011; 9(1&2): 29-36

scholarly journals Evaluation of early maize genotypes for grain yield and agromorphological traits

2018 ◽  
Vol 3 (1) ◽  
pp. 67-76 ◽  
Author(s):  
Bishal Dhakal ◽  
Keshav Prasad Shrestha ◽  
Bishnu Prasad Joshi ◽  
Jiban Shrestha
Keyword(s):  
Grain Yield ◽  
Morphological Traits ◽  
Agricultural Research ◽  
Block Design ◽  
Research Field ◽  
Research Station ◽  
Local Variety ◽  
Selection Strategies ◽  
Maize Genotypes ◽  
Randomized Complete Block Design

The purpose of this study was to assess the variation on agro-morphological traits and grain yield. A set of 14 early maize genotypes were studied at research field of Regional Agricultural Research Station (RARS), Doti, Nepal in summer seasons of 2015 and 2016. The experiment was carried out in Randomized Complete Block Design (RCBD) with three replications in each year. The variation among genotypes was observed for grain yield and flowering. The genotype SO3TEY-PO-BM produced the highest grain yield (4.33 t/ha) in 2015 whereas Rajahar Local Variety produced the highest grain yield (2.52 t/ha) in 2016. The combined analysis over years showed that Farmer’s variety was found earlier in tasseling (36 days) and silking (39 days), followed by S97TEYGHAYB(3) in tasseling (45 days) and by S97TEYGHAYB(3) and Arun-4 in silking (48 days). EEYC1 produced the highest grain yield (3.17 t/ha), followed by COMPOL-NIBP (3.09 t/ha), SO3TEY-PO-BM (2.90 t/ha), S97TEYGHAYB(3) (2.78 t/ha) and Rajahar Local variety (2.77 t/ha), respectively. The information on variation for the agro-morphological traits among studied early maize genotypes will be helpful to plant breeders in constructing their breeding materials and implementing selection strategies.

scholarly journals Performances of different hybrid maize (Zea mays L.) varieties under intercropping systems with groundnut (Arachis hypogaea L.)

1970 ◽  
Vol 34 (4) ◽  
pp. 585-595 ◽  
Author(s):  
MS Alom ◽  
NK Paul ◽  
MA Quayyum
Keyword(s):  
Agricultural Research ◽  
Block Design ◽  
Crop Productivity ◽  
Research Station ◽  
Land Equivalent Ratio ◽  
Planting Methods ◽  
Maize Varieties ◽  
Randomized Complete Block Design ◽  
Hybrid Maize ◽  
Equivalent Yield

The experiment was carried out at Regional Agricultural Research Station, Bangladesh Agricultural Research Institute (BARI), Jessore to evaluate the performance of different varieties of hybrid maize under intercropping systems with groundnut in rabi seasons to find out the suitable intercropping system in increasing crop productivity and profitability of consecutive two years (2004 and 2005). Four sole crops of hybrid maize varieties (BHM-1, BHM-3, Pacific-11 and Pacific-984), one sole crop of groundnut (var. Jhingabadam) and eight intercropping systems of maize + groundnut under two planting methods viz., normal and paired row made 13 treatments were used. Treatments were arranged in a randomized complete block design with four replications. Among the intercropped treatments, four rows groundnut in between paired rows of hybrid maize var. Pacific-11 showed higher maize equivalent yield (13.56 t/ha in 2003-04 and 15.34 t/ha in 2004-05), groundnut equivalent yield (4.34 t/ha in 2003-04 and 4.91 t/ha in 2004-05), land equivalent ratio (1.54 in 2003-04 and 1.66 in 2004-05) as compared to other treatments. Key Words: Hybrid maize varieties; intercropping systems; groundnut. DOI: 10.3329/bjar.v34i4.5835Bangladesh J. Agril. Res. 34(4) : 585-595, December 2009

scholarly journals Growth and yield performance of different open pollinated tomato genotypes in Terai region of Nepal

2021 ◽  
Vol 4 (1) ◽  
pp. 256-264
Author(s):  
Tek Prasad Gotame ◽  
Surendra Lal Shrestha ◽  
Sujata Poudel ◽  
Jiban Shrestha
Keyword(s):  
Rating Scale ◽  
Agricultural Research ◽  
Block Design ◽  
Research Field ◽  
Growth And Yield ◽  
Research Station ◽  
Vegetable Crops ◽  
Superior Genotype ◽  
Moderate Resistance ◽  
Tomato Genotypes

Tomato is one of the major vegetable crops inNepal. The productivity of tomato in Nepal is very low due to lack of high yielding, disease and pests resistant varieties.The objective of the experiement was to evaluate the  performance of open pollinated tomato genotypes. Ten open pollinated tomato genotypes were evaluated at on-station research field of Regional Agricultural Research Station, Parwanipur, Bara in the winter seasons of 2015 and 2017, and seven tomato genotypes were evaluated at farmers’ fields of Bara and Parsa districts, Nepal in the winter seasons of 2017 and 2018.The experiments were carried out in randomized complete block design with three replications. Results of the on-station experiments showed that HRDTOM084 produced the highest yield (29.1 t/ha in 2015 and 28.5 t/ha in 2017)  and showed consistant performance over the two seasons. It was the superior genotype in terms of yield and yield attributing traits. Tomato genotypes HRDTOM011, HRD109, HRDTOM080 and HRDTOM086 were found vigorous with a score value 5  in 1 to 5 rating scale. The results of the farmers’ field experiment showed that the tomato genotypes HRDTOM084 and HRDTOM085 were found more productive and high yielding compared to other genotypes. The highest yield was produced in HRDTOM084 with a mean of two season yield 49.85 t/ha followed by HRDTOM085 with a mean of two season yield 47.42 t/ha).These genotypes showed moderate resistance to late blight and septoria leaf spot with a score value of 2.3 in 1-5 rating scale. Therefore, HRDTOM084 and HRDTOM085 were the most productive and gave higher yield compared to others.  Hence, these two tomato genotypes can be used by tomato growers under field conditions in Terai region of Nepal.

Screening of promising accessions of urdbean (V. mungo L.) from different agro‐ecological zones of Southern and South–Eastern Rajasthan (India) based on biometrical attributes

2012 ◽  
Vol 2 (2) ◽  
pp. 66-72
Author(s):  
S. S. Punia ◽  
Baldev Ram ◽  
Meenakshi Dheer ◽  
A. Raghuvanshi ◽  
N. R. Koli ◽  
...  
Keyword(s):  
Quantitative Traits ◽  
Agricultural Research ◽  
Block Design ◽  
Research Station ◽  
Genetic Advance ◽  
Ecological Zones ◽  
Qualitative And Quantitative ◽  
Randomized Block Design ◽  
Wide Range ◽  
High Heritability

Genetic variability among 133 accessions of urdbean (Vigna mungo) collected from different agro‐ecological zones of Southern and South–Eastern Rajasthan, India was assessed for several qualitative and quantitative traits. These accessions along with two national checks KU 96‐3 and RBU 38 were evaluated in randomized block design with three replications at experimental field of Agricultural Research Station, Ummedganj, Kota (25.18°N and 75.86°E), Rajasthan, India during kharif 2009 and 2010. Wide range of variability was observed for both qualitative and quantitative traits. Plant height (cm), primary branches and pods per plant showed high genetic advance and moderate to high heritability. This suggests that the selection based on these traits would be useful in improving the seed yield. The genotypes like KPU 1099, KPU 1057 and KPU 1086 can be used as promising donor parents in recombination breeding programme for obtaining high heterotic response and better segregants.

scholarly journals Production potential of different varieties of hybrid maize (Zea mays L.) with groundnut (Arachis hypogaea L.) under intercropping system

1970 ◽  
Vol 35 (1) ◽  
pp. 51-64
Author(s):  
MS Alom ◽  
NK Paul ◽  
MA Quayyum
Keyword(s):  
Agricultural Research ◽  
Block Design ◽  
Cost Ratio ◽  
Research Station ◽  
Production Potential ◽  
Area Index ◽  
Benefit Cost Ratio ◽  
Planting Methods ◽  
Maize Varieties ◽  
Hybrid Maize

The experiment was carried out at the Regional Agricultural Research Station, Bangladesh Agricultural Research Institute (BARI), Jessore to evaluate the performance of different varieties of hybrid maize under intercropping systems with groundnut in Rabi seasons for higher productivity and profitability. Four sole crops of hybrid maize varieties viz., BHM-1, BHM-3, Pacific-11, and Pacific-984, one sole crop of groundnut (var. Jhingabadam) and eight intercropping systems of maize + groundnut under two planting methods viz., normal and paired row made 13 treatments, were used for two consecutive years (2004 and 2005). Treatments were arranged in a randomized complete block design with four replications. Among the intercropped treatments, four rows groundnut in between paired rows of hybrid maize var. Pacific 11 showed higher total dry mater (TDM), leaf area index (LAI), crop growth rate (CGR), gross return, net return and benefit cost ratio (BCR) than the other planting systems tested in the experiment. Keywords: Production potential; hybrid maize; groundnut; intercropping system. DOI: 10.3329/bjar.v35i1.5866Bangladesh J. Agril. Res. 35(1) : 51-64, March 2010

scholarly journals Productivity of potato - hybrid maize relay cropping system as influenced by fertilizer dose

2015 ◽  
Vol 17 (2) ◽  
pp. 9-13
Author(s):  
AKM S Hoque ◽  
MN Islam ◽  
MH Hossain ◽  
MAH Khan
Keyword(s):  
Agricultural Research ◽  
Cropping System ◽  
Research Field ◽  
Cost Ratio ◽  
Research Station ◽  
Gross Margin ◽  
Benefit Cost Ratio ◽  
Relay Cropping ◽  
Hybrid Maize ◽  
Benefit Cost

The experiment was conducted at research field of Agricultural Research Station, BARI, Comilla during November 2012 to June 2013 with a view to find out economic fertilizer dose for potato- hybrid maize relay cropping system. The potato variety BARI Alu-7 and the maize variety BARI Hybrid Maize-7 were used. Seven fertilizer combinations viz. T1= Farmers fertilizer dose of potato (FFDP) + without additional fertilizer for maize (WAFM), T2= FFDP + 100% N of recommended fertilizer dose of hybrid maize (RFDM), T3= FFDP + 100% N & 25% others of RFDM, T4= FFDP + 100% N & 50% others of RFDM, T5= Recommended fertilizer dose of potato (RFDP) +100% N of RFDM, T6= RFDP +100% N & 25% others of RFDM and T7= RFDP +100% N & 50% others of RFDM were tested on potato-hybrid maize relay cropping system. Farmer’s fertilizer dose for potato was 504-162-309 kg ha-1 NPK. Recommended fertilizer dose for potato and hybrid maize was 198-44-194-24-6-1.2 kg ha-1 NPKSZnB and 255-55-140-40-6-2 kgha-1 NPKSZnB, respectively. The highest potato equivalent yield (37.80 t ha-1) and gross return (4,53,600 Tk. ha-1) were obtained from T3 treatment. But the maximum gross margin (Tk. 3,03,075 Tk. ha-1) was found from treatment T1 and the highest benefit cost ratio (3.14) was observed in T5 whichwas close to T1 (3.06) and T6 (3.0) .The results revealed that recommended fertilizer dose of potato and 100% N from recommended fertilizer dose of hybrid maize might be used for potato hybrid maize relay cropping system for getting higher economic return at Comilla region.Bangladesh Agron. J. 2014, 17(2): 9-13

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