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Journal Cover Bangladesh Journal of Agricultural Research
   [4 followers]  Follow    
  This is an Open Access Journal Open Access journal
     ISSN (Print) 0258-7122
     Published by Bangladesh Journals Online Homepage  [87 journals]
  • Changes in physicochemical attributes of sweet pepper (Capsicum annum L.)
           during fruit growth and development

    • Authors: MA Rahman, GMA Halim, MGF Chowdhury, MA Hossain, MM Rahman
      Abstract: Changes in physicochemical attributes of sweet pepper var. ‘BARI Misti Morich-1’ during fruit growth and development were studied. Capsicum flowers were tagged on the day of anthesis and fruits were harvested at three days interval started on 33 days after anthesis (DAA) until 48 DAA, when turned to light green colour. Length, diameter, and weight of fruits were linearly increased from 33 DAA to 48 DAA. Dry matter content, TSS, firmness, and shelf life of fruits were also gradually increased with lengthen the harvesting time from flower anthesis and reached from 5.1 to 7.3%, 4 to 5%, 7.1 to 14.5 kgf cm-2 and 9.6 days to 21.3 days, respectively, from 33 DAA to 48 DAA. However, ascorbic acid content of fruits was sharply decreased from 68 to 56 mg/100g from first harvest to last harvest, respectively. Hue angle declined with time while chroma and lightness values increased with fruit maturity. Considering all physical and nutritional characteristics and shelf life along with sensory evaluation scores, fruits of BARI Misti Morich-1 was found suitable to harvest after 45 days of anthesis, when they attained length 12.2 cm, diameter 8.8 cm, and weight 191g. Moreover, fruits were crispier, glossy with attractive colour and flavour and contained 58 mg/100g ascorbic acid at this maturity stage.
      DOI : http://dx.doi.org/10.3329/bjar.v39i2.20446 Bangladesh J. Agril. Res. 39(2): 373-383, June 2014
      PubDate: 2014-09-15
      Issue No: Vol. 39 (2014)
       
  • Development of suitable package for transportation of guava (Psidium
           guajava L.)

    • Authors: MN Amin, MA Hossain, MS Miah, MS Hassan, MA Hoque
      Abstract: Guava (Psidium guajava L.) is a perishable and climacteric fruit. The peel surface of guava is soft. During transportation, guava surface is rupture lack of proper packaging. Two types of corrugated fibre board (CFB) cartons of 7 and 5 ply and one type of wooden box were designed and fabricated for transportation of guava in Farm Machinery and Postharvest Process Engineering (FMPE) Division, Bangladesh Agricultural Research Institute, Gazipur in 2013. The dimensions of the cartons were 513 x 300 x 240 mm and 400 x 300 x 300 mm. The 7 ply cartons of both the size were found better than those of 5 ply cartons in terms of static load bearing capacity. The carton of 513 x 300 x 240 mm was better than that of second one. The holding capacities of these cartons were about 18-20 kg of guava. The static load bearing capacities of both the cartons of 7 and 5 ply cartons were 90 and 70 kg, respectively. Green matured guava was harvested, sorted and packed in different packages, such as bamboo basket, wooden box, plastic crate, and CFB cartons. They were transported from Sharupkhati of Barisal to Gazipur by a track. Then the guava packages were opened in FMPE Division, BARI, Gazipur and stored at ambient temperature (28.8 ± 2°C) and humidity (87± 2%) for 8 days. The highest shelf-life of guava was found in wooden box without wrapping and the lowest shelf-life was in CFB cartons with polyethylene (0.05 mm) having 2% perforation. Wooden box was found suitable as packaging material for transportation of guava in terms of freshness, shelf-life, and packaging cost. Packaging cost of CFB cartons was higher followed by that of plastic crate, wooden box, and bamboo basket. Packaging costs of plastic crate and wooden box were cheaper than those of CFB cartons and bamboo basket. Plastic crate and wooden box should be used for local market to transport the fruits. CFB carton may be used for export market or supper market.
      DOI : http://dx.doi.org/10.3329/bjar.v39i2.20437 Bangladesh J. Agril. Res. 39(2): 337-350, June 2014
      PubDate: 2014-09-15
      Issue No: Vol. 39 (2014)
       
  • Optimization of fertilizer rate based on farmers’ practice in
           potato-hybrid maize relay cropping system

    • Authors: MN Islam, M Akhteruzzaman, MS Alom
      Abstract: The experiment was conducted at the research field of Agronomy Division, BARI, Joydebpur, Gazipur during consecutive seasons of 2011-12 and 2012-13 to optimize fertilizer rate for potato hybrid maize relay cropping system. Seven treatments viz., T1= Farmers‟ fertilizer dose of potato (FFDP: N504P162K309 kg/ha) + Farmers‟ fertilizer dose of hybrid maize (FFDM: N0 P0 K0 kg/ha), T2= FFDP + 100% N of recommended fertilizer dose of hybrid maize (RFDM: N255 P55 K140 S40 Zn6 B2 kg/ha), T3= FFDP + 100% N & 25% others of RFDM, T4= FFDP + 100% N & 50% others of RFDM, T5= Recommended fertilizer dose of potato (RFDP: N198 P44 K194 S24 Zn6 B1.2 kg/ha) +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. Potato (var. Diamant) and hybrid maize (var. BARI Hybrid Maize-9) were used in this experiment. Results indicated that yield of potato (28.38 - 28.83 t/ha) did not differ significantly but yield of hybrid maize (4.90 - 8.74 t/ha) varied significantly under different treatments. The higher grain yield (8.74 t/ha) of hybrid maize was recorded in farmers‟ fertilizer dose of potato or recommended fertilizer dose of potato (8.61 t/ha) along with 100% N plus 25% other fertilizers or 100% N plus 50% other fertilizers from recommended dose of hybrid maize. The highest potato equivalent yield (41.94 t/ha) and gross return (Tk. 335520/ha) were obtained from FFDP along with 100% N plus 25% others of RFDM (T3). But the highest gross margin (Tk. 219790/ha) and benefit cost ratio (3.01) were found from RFDP along with 100% N plus 25% others of RFDM (T6). The results revealed that recommended fertilizer rate of potato (N198 P44 K194 S24 Zn6 B1.2 kg/ha) along with 100% N plus 25% other fertilizers from recommended fertilizer rate of hybrid maize (N255 P55 K140 S40 Zn6 B2 kg/ha) might be optimum for potato hybrid maize relay cropping system for obtaining higher economic return.
      DOI : http://dx.doi.org/10.3329/bjar.v39i2.20443 Bangladesh J. Agril. Res. 39(2): 351-357, June 2014
      PubDate: 2014-09-15
      Issue No: Vol. 39 (2014)
       
  • Response of coriander (Coriandrum sativum L.) foliage to different rates
           and methods of nitrogen application

    • Authors: M Moniruzzaman, MM Rahman, MM Hossain, AJM Sirajul Karim, QA Khaliq
      Abstract: The experiment was conducted at Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur during January 2009 to February 2009 taking two coriander (Coriandrum sativum L.) lines, CS001 and CS003 to determine the nitrogen requirement of coriander foliage crop and to select the best method of nitrogen application for maximizing foliage yield. The experiment was laid out in randomized complete block design with three replications having five nitrogen doses (0, 20, 40, 60, and 80 kg/ha) and four methods of N application (entire N dose as basal, ½ N as basal, and ½ N at 30 days after sowing as top dressing, ½ N as basal and ½ N at 30 DAS as foliar spray and 2/3 N at 20 DAS, 1/3 N at 30 DAS, and 1/3 N at 40 DAS as foliar spray). The nitrogen dose of 80 kg/ha and ½ N as basal and ½ N at 30 days after sowing as top dressing independently gave the maximum plant height, number of leaves/plant, single plant weight, plant weight/m2, and foliage yield/ha. Nitrogen @ 80 kg/ha applied half as basal and half at 30 DAS as top dress produced maximum foliage yield/ha closely followed by 60 kg and 40 kg N/ha with the same application method. The highest gross margin was recorded from 80 kg N/ha applied half as basal and half at 30 DAS as top dress (Tk. 262.705 thousand/ha) followed by 60 kg N/ha with the same application method (Tk. 259.529 and Tk. 254.342 thousand/ha, respectively) and these two combinations also gave the highest benefit-cost ratio of 6.90
      DOI : http://dx.doi.org/10.3329/bjar.v39i2.20445 Bangladesh J. Agril. Res. 39(2): 359-371, June 2014
      PubDate: 2014-09-15
      Issue No: Vol. 39 (2014)
       
  • Effect of nitrogen, phosphorus, potassium, and sulphur on the growth and
           seed yield of coriander (Coriandrum sativum L.)

    • Authors: MN Yousuf, S Brahma, MM Kamal, S Akter, MEK Chowdhury
      Abstract: A field experiment was conducted at the Spices Research Centre, Shibgonj, Bogra, Bangladesh during the rabi seasons of 2008-2009 and 2009-2010 to determine the requirement of N, P, K, and S of coriander (BARI Corinader-1) for achieving satisfactory seed yield of this crop. Different levels of nitrogen (0, 40, 70, and 100 kg/ha), phosphorus (0, 25, 50, and 70 kg/ha), potassium (0, 30, 60, and 90 kg/ha), and sulphur (0, 10, 20, and 30 kg/ha) were distributed in the plot. The experiment was tested in randomized complete block design with three replications. There was positive impact of application of those nutrients on the yield and yield contributing characters of coriander up to a moderate level of N70P50K30S20 kg/ha. The highest seed yield (2.06 t/ha in 2008-2009 and 2.09 t/ha in 2009-2010) was obtained with this moderate application of N, P, K, and S (70, 50, 30, and 20 kg/ha, respectively) and yield was declined with higher doses of these elements. The fertilizer treatment N70P50K30S20 was observed to be the best suitable dose for coriander cultivation on Grey Terrace Soil of Amnura Soil Series under AEZ-25(Level Barind Tract) of Bangladesh.
      DOI : http://dx.doi.org/10.3329/bjar.v39i2.20433 Bangladesh J. Agril. Res. 39(2): 303-309, June 2014
      PubDate: 2014-09-13
      Issue No: Vol. 39 (2014)
       
  • Yield and yield attributes of rapeseed – mustard (Brassica)
           genotypes grown under late sown condition

    • Authors: Md Mahbubul Alam, Ferdousi Begum, Pryanka Roy
      Abstract: A field experiment was conducted at the Central Research Station of BARI, Gazipur for two consecutive years 2010-11 and 2011-12 with 30 varieties/ genotypes of rapeseed-mustard under three dates of sowing viz., 25 November, 5 December, and 15 December to determine changes in crop phenology, growth and yield of mustard genotypes under late sown condition when the crop faced high temperature. Days to flowering and maturity were different at different planting times. Date of sowing significantly influenced plant height, siliquae/plant, seeds/siliqua, seed yield, and oil content of seed in both the years. The highest seed yield (1310 and 1535 kg/ha) was obtained from the first planting (25 November) in both the years, which was significantly different from two other dates of sowing. Yield and yield attributes of different varieties varied significantly. Among the varieties, BARI Sarisha-16 of Brassica juncea gave significantly the highest seed yield (1495 and 1415 kg/ha), which was statistically identical to BJDH-11, BJDH-12, BJDH-05, BJDH-20, and BARI Sarisha-6 and significantly different from all other varieties. Interaction effect of variety and sowing date significantly influenced plant height, number of siliquae per plant, number of seeds per siliqua, seed yield, and strover yield. The highest seed yield (1758 and 1825 kg/ha) were recorded from BJDH-11 and BARI Sarisha-16 of Brassica juncea at 25 November planting and BJDH-11 produced the highest yield at 15 December in both the years. The maximum strover yield (3758 and 3825 kg/ha) were obtained from BJDH-11 and BARI Sarisha-16 of Brassica juncea at 25 November planting during 2010-11 and 2011-12. The highest oil content of seeds (44.4 % and 45.9%) were obtained from the seed of BARI Sarisha-6 and BARI Sarisha-14 at 25 November planting in both the years.
      DOI : http://dx.doi.org/10.3329/bjar.v39i2.20434 Bangladesh J. Agril. Res. 39(2): 311-336, June 2014
      PubDate: 2014-09-13
      Issue No: Vol. 39 (2014)
       
  • Variability and heritability analysis in F4 genotypes of Brassica rapa L.

    • Authors: N Jahan, MH Khan, S Ghosh, SR Bhuiyan, S Hossain
      Abstract: A field experiment was conducted in the experimental field of Genetics and Plant Breeding Department, Sher-e Bangla Agricultural University, Dhaka, Bangladesh to study variability in 10 F4 lines obtained through intervarietal crosses along with 8 released varieties of Brassica rapa. Significant variation was observed among all the genotypes for all the characters studied. Considering genetic parameters high genotypic co-efficient of variation (GCV) was observed for number of secondary branches per plant, siliquae per plant, yield per plant, whereas days to maturity showed very low GCV. High heritability with low genetic advance in percent of mean was observed for days to maturity which indicated that non-additive gene effects were involved for the expression of this character and selection for such trait might not be rewarding. High heritability with moderate genetic advance in percent of mean was observed for plant height and days to 50% flowering indicating that this trait was under additive gene control and selection for genetic improvement for this trait would be effective. Considering, inter genotypic variability, heritability, and genetic advance, % coefficient of variation and other agronomic performance G2, G14, G18, G1, G9, G12, G16, G17 may be considered to be better parents for future uses in hybridization programme.
      DOI : http://dx.doi.org/10.3329/bjar.v39i2.20426 Bangladesh J. Agril. Res. 39(2): 227-241, June 2014
      PubDate: 2014-09-12
      Issue No: Vol. 39 (2014)
       
  • Impact of shifting of land under cereal crops to jujube cultivation in
           selected areas of Bangladesh

    • Authors: S Khandoker, MA Monayem Miah, M Khatun, Mohammad Shamsul Hoq, Nanda Dulal Kundu
      Abstract: Area shift in favour of fruits has been suggested as a viable option to stabilize and raise farm income, enhance agricultural growth, and increase employment opportunities. Studies on micro-level decision taking for area shift in favour of fruits are very scanty. Therefore, an attempt was made to assess the socioeconomic status of jujube farmers, relative profitability of jujube cultivation, and factors influencing the shifting lands from cereal to jujube cultivation. The study was conducted in three districts, namely Pabna, Natore and Chapai Nababgonj during 2012-13. A total of 180 farmers taking 60 from each district were selected randomly for the study. The per hectare costs of jujube cultivation were Tk. 2,77,232 in the 1st year; Tk. 2,27,925 in the 2nd year; and Tk. 1,90,217 in the 3rd year. The average yields of jujube were found highest in the 3rd year (15.54 t/ha) followed by 2nd year (9.96 t/ha). Per hectare net returns from jujube cultivation were Tk. 1,45,978 in the 2nd year and Tk 3,45,720 in the 3rd year. The total cost of jujube cultivation was around 50% higher than the costs incurred for different cropping patterns. The net return of jujube cultivation was 57% higher compared to different cropping patterns. The shifting of cereal lands to jujube cultivation was reported to be a profitable enterprise as indicated by higher BCR (1.47), net present value (Tk. 2,31,791), and internal rate of return IRR (94%) of jujube cultivation. Relative income and education turned out to be positively significant, whereas age and food crop requirements at home negatively significant for shifting decision from cereal crops to jujube cultivation. Disease and insect infestation, lack of training facilities, and lack of access to credit were the major constraints for jujube cultivation. Jujube cultivation may be encouraged from state authority to increase farmers‟ income.
      DOI : http://dx.doi.org/10.3329/bjar.v39i2.20427 Bangladesh J. Agril. Res. 39(2): 243-262, June 2014
      PubDate: 2014-09-12
      Issue No: Vol. 39 (2014)
       
  • Genetic diversity of fruit borer, Helicoverpa armigera (Lepidoptera:
           Noctuidae) based on random amplified polymorphic DNA- polymerase chain
           reaction

    • Authors: AKMZ Rahman, MA Haque, SN Alam, P Yasodha, V Balasubramani
      Abstract: The genetic variability of Helicoverpa armigera (Hübner) at different agroecological zones of Bangladesh in comparison with Indian population was conducted in India during September 2008 to February 2009. A total of 12 H. armigera populations of which 10 populations collected from different agroecological zones of Bangladesh and two populations from India were tested for their genetic variability. Eight out of the ten primers produced scorable PCR products by amplifying the template DNA with taq polymerase and were subjected for analysis. Those eight primers got amplified to a total of 138 markers which produced polymorphic markers. The similarity coefficient based on 138 RAPD markers ranged from 0.000 to 0.777 of the pair-wise combination among twelve samples of H. armigera. An UPGMA dendrogram based on Jaccard’s similarity coefficient was constructed for the 12 samples of H. armigera. The dendrogram showed that H. armigera population from Bangladesh had 25 to 45 percent similarity, and in its Indian population the similarity remained within this range.
      DOI : http://dx.doi.org/10.3329/bjar.v39i2.20428 Bangladesh J. Agril. Res. 39(2): 263-271, June 2014
      PubDate: 2014-09-12
      Issue No: Vol. 39 (2014)
       
  • Insect pests of groundnut (Arachis hypogaea L.), nature of damage and
           succession with the crop stages

    • Authors: GC Biswas
      Abstract: Thirty six species of insect pests were found to infest the different growth stages of groundnut crop at Gazipur, Bangladesh during the rabi seasons of 2008-09 and 2009-010. Among the recorded pest species, the hairy caterpillar, Spilarctia obliqua ( Walker); common cutworm, Spodoptera litura F.; jassid, Empoasca terminalis Distant ; leaf miner, Stomopteryx nerteria M. and leaf roller, Anersia ephippias (Meyr.) were considered as the major pests, while the rests were of minor importance on the basis of their population densities/plant, nature and extent of damage and yield reductions. Most of the major and minor pests infested during the vegetative to pre-maturity stages (45-95 DAS) and the maximum infestation occurred during pod formation and pod filling stages (50- 80 DAS) of the crop in both the years.
      DOI : http://dx.doi.org/10.3329/bjar.v39i2.20429 Bangladesh J. Agril. Res. 39(2): 273-282, June 2014
      PubDate: 2014-09-12
      Issue No: Vol. 39 (2014)
       
  • Combining ability study in waterlogged tolerant maize (Zea mays L.)

    • Authors: MN Amin, M Amiruzzaman, A Ahmed, MR Ali
      Abstract: Combining ability was studied for kernel yield and yield components in a 8×8 diallel cross of waterlogged tolerant maize. Significant general and specific combining ability variances were observed for all the characters studied. Additive genetic variance was preponderant in plant height, ear height, ear length, ear diameter, and kernel weight and non-additive gene action was involved in days to silking, number of kernels per ear and kernel yield. The parental lines E-31 and E-79 were found to be the best general combiners for yield. The good combining parents for different traits could be used in hybridization to improve yield and other desirable traits as donor parents for the accumulation of favourable genes. The cross combinations, E 31× E 40, E 31× E 64, E 31× E 79, E 38× E 40, E 58× E 79, E 63× E 79, E 64 × E 79 showing significant and positive sca effects can be used for commercial hybrid variety development after verifying them at different locations.
      DOI : http://dx.doi.org/10.3329/bjar.v39i2.20430 Bangladesh J. Agril. Res. 39(2): 283-291, June 2014
      PubDate: 2014-09-12
      Issue No: Vol. 39 (2014)
       
  • Genotype x environment interaction for grain yield of maize (Zea mays L.)
           inbreds under salinity stress

    • Authors: A Bisawas, U Sarker, BR Banik, MM Rohman, MZA Talukder
      Abstract: An experiment was conducted on Maize (Zea mays L.) to investigate the genotype × environment interaction for gain yield of maize inbreds under salinity stress. The objective of this study was to evaluate G × E interactions and yield stability in multi-environmental trials across wide ecological stress environments. Prescreened thirteen maize inbred lines collected from CYMMT, India were evaluated for phenotypic traits at different salinity conditions (8dS, 12dS and 16dS) with normal environment. The environmental mean and genotypic mean ranged from 10.3 to 49.7 g and 10.9 to 52.8 g, respectively. The regression coefficient (bi) values of these genotypes ranged from 0.44 to 1.66. Among the genotypes P43, CZ29 and CZ33 produced higher grain yield and highly responsive under different salinity level. On the other hand considering the Pi, bi, S2di and AMMI bi-plot analysis the genotypes E32, P29 and P35 showed almost stable performance across the different salinity conditions.
      DOI : http://dx.doi.org/10.3329/bjar.v39i2.20431 Bangladesh J. Agril. Res. 39(2): 293-301, June 2014
      PubDate: 2014-09-12
      Issue No: Vol. 39 (2014)
       
  • Screening of carrier materials to formulate Trichoderma harzianum based
           bio-fungicide against foot and root rot disease of tomato (Lycopersicon
           esculentum L.)

    • Authors: MI Faruk, ML Rahman, MMH Mustafa, MM Rahman, MA Rahman
      Abstract: Eight different organic matters were tested for their suitability as carrier materials to prepare Trichoderma harzianum based bio-fungicides for controlling foot and root rot disease of tomato caused by Sclerotium rolfsii. Four independent experiments were conducted and found that the carrier materials used singly or in combinations were suitable to prepare the bio-fungicides. Mixed use of carrier materials gave better results as compared to single ones. When wheat bran + rice bran, wheat bran + MOC+ rice bran, grasspea bran + rice bran, and grasspea bran +MOC+ rice bran were used as carrier materials. T. harzianum based bio- fungicides reduced seedling mortality of tomato by 20.33, 19.33, 24.33, and 19.34%, respectively. Treatment of soil with those biofungicides previously infested with S. rolfsii caused considerable increased in shoot and root growth of tomato. Based on the findings of investigation, the above mentioned carrier materials might be used to prepare T. harzianum based bio-fungicides.
      DOI : http://dx.doi.org/10.3329/bjar.v39i2.20415 Bangladesh J. Agril. Res. 39(2): 197-209, June 2014
      PubDate: 2014-09-11
      Issue No: Vol. 39 (2014)
       
  • Total dry matter production of potato, mungbean and t. aman rice as
           influenced by nutrient management of potato-mungbean-t. aman rice cropping
           pattern

    • Authors: MAHS Jahan, MAR Sarkar, M Salim, N Islam, TP Tiwari
      Abstract: A field experiment was conducted at the Regional Wheat Research Centre (RWRC) of the Bangladesh Agricultural Research Institute, Gazipur, Bangladesh for 2 consecutive years during 2006-07 and 2007-08 with the objective to find out the optimum nutrient management practice on total dry matter production (above ground part) of each component crop of potatomungbean- t. aman rice cropping pattern. Twelve nutrient management treatments were tested in RCBD with 3 replications. Treatments were, T1=HYG (0-198-44-194-24-6-1.2), T2=MYG (0-140-34-138-18-4.5-0.9), T3=IPNS (10000-168-38-170-18-6-1.2), T4=STB (0-171-40-164-22-5-1), T5=FP (0-97-16- 91-0-0-0), T6=CON (0-0-0-0-0-0-0), T7=HYG+CRI, T8=MYG+CRI, T9=IPNS+CRI, T10=STB+CRI, T11=FP+CRI, T12=CON+CRI kg/ha CDNPKSZnB, for potato; T1=HYG (0-24-40-48-24-3-1.2), T2=MYG (0-20-36- 40-20-2-1), T3=IPNS (5000-9-37-36-21-3-1.2), T4=STB (0-20-36-40-22-2-1), T5=FP (0-6-5-4-0-0-0), T6=CON (0-0-0-0-0-0-0), T7=HYG+CRI , T8=MYG+CRI, T9=IPNS+CRI, T10=STB+CRI, T11=FP+CRI, T12=CON+CRI kg/ha CDNPKSZnB for mungbean and T1=HYG (0-80-16-44-12-2-0), T2=MYG (0-56-12-32-8-1.5-0), T3=IPNS (5000-65-13-32-9-2-0), T4=STB (0- 68-15-37-11-2-0), T5=FP (0-39-37-12-0-0-0), T6=CON(0-0-0-0-0-0- 0),T7=HYG+CRI, T8=MYG+CRI, T9=IPNS+CRI, T10=STB+CRI,T11=FP+CRI, T12=CON+CRI kg/ha CDNPKSZnB for t. aman rice. HYG treatment without or with crop residues incorporation produced the highest TDM in potato, mungbean and t. aman rice followed by IPNS and STB along with or without CRI. The lowest TDM was recorded in control plot without CRI. The increasing trend of TDM was observed in the crop residues incorporation plots than nonincorporation plots. It was observed that there were significant and positive linear relationship between TDM and yield of potao, mungbean, and t. aman rice at 60 DAP, 60 DAS, and 90 DAT, respectively, in both the years.
      DOI : http://dx.doi.org/10.3329/bjar.v39i2.20416 Bangladesh J. Agril. Res. 39(2): 211-225, June 2014
      PubDate: 2014-09-11
      Issue No: Vol. 39 (2014)
       
  • Genetic diversity analysis in spring wheat (Triricum aestivum L.)

    • Authors: MF Amin, M Hasan, NCD Barma, MG Rasul, MM Rahman
      Abstract: Genetic divergences of 50 wheat lines were studied through Mohalanobis’s D2 and principal component analysis for fourteen characters. Genotypes were grouped into four different clusters. Cluster II comprised maximum number of genotypes (twenty one) followed by cluster IV. The inter-cluster distance was maximum between clusters I and III (12.29) indicating wide genetic diversity between these two clusters followed by the distance between cluster I and cluster II (8.28), and cluster III and cluster IV (7.97). The minimum inter-cluster distance was observed between cluster II and cluster IV (4.193) followed by cluster I and cluster IV (4.339) and cluster II and cluster III(4.390) indicating that the genotypes of these clusters were genetically close. The intra cluster distance of all the four clusters was more or less low which indicated that the genotypes within the same cluster were closely related. The highest inter genotypic distance (0.9166) was observed between the genotypes G 40 and G 41and lowest (0.0993) between the genotypes G 22 and G 43. Among the characters, heading days, maturity days, plant height (cm), canopy temperature at vegetative stage, canopy temperature at grain filling stage, grain filling rate (g d-1m-2), 1000- grain weight (g), and grains spike-1 contributed most for divergence in the studied genotypes. Cluster I had the highest mean for grain yield (4711.2 kg/ha), grain filling rate (17.5 g d-1m-2), chlorophyll content at anthesis, and plant height (93 cm). Crosses between I & III, I & II, and III & IV have greater chances to generate more heterotic F1s. Considering magnitude of genetic distance, contribution of different traits toward the total divergence, magnitude of cluster means for different traits and performance the genotypes G10, G 11, G12, G35, G40, G48 of cluster I, G7 of cluster II, G41, G5,and G3 of cluster III and G46, G21 of cluster IV may be considered as good parents for future hybridization program to produce high yielding genotypes.
      DOI : http://dx.doi.org/10.3329/bjar.v39i2.20414 Bangladesh J. Agril. Res. 39(2): 189-196, June 2014
      PubDate: 2014-09-11
      Issue No: Vol. 39 (2014)
       
 
 
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