Bangladesh Rice Journal Official journal of Bangladesh Rice Research Institute (BRRI). Full text articles available. en-US <p class="ListParagraph">All rights reserved to Executive Editor, Bangladesh Rice Journal (BRJ), BRRI, Gazipur-1701.</p> (Dr Md Shahjahan Kabir) (Md Fahmid Uddin Khondoker) Mon, 23 Mar 2020 08:41:45 +0000 OJS 60 Screening Rice Germplasm against Sheath Blight Disease of Rice and its Integrated Management in Bangladesh <p>Fifty-seven rice germplasm collected from BRRI Genebank were screened against sheath blight (ShB) by artificial inoculation in field and laboratory conditions in T. Aman 2012. Significant differences on relation to lesion height (RLH) among the germplasm were observed, where the highest (83%) was recorded in susceptible check, BR11 and the lowest (8.33%) was in Orgoja. Severity score of ShB was recorded maximum (9) in Dudhsail, Basi, Chaula mari, Holdemota, Calendamota, Semmua, Kotijira, Halisail, Horakani, Kalisura, Ashfuli, Huglapata and BR11 as highly susceptible to ShB, whereas it was minimum (1) in Orgoja. Gopal ghosh was observed as moderately tolerant with 27.33% RLH and severity score 3, while Kala binni, Khazur chari, Binni, Kalagora, Patjait and Dorkumur found moderately tolerant with severity score 5. In detached sheath inoculation method in test tube, most of the germplasms found highly susceptible, except Orgoja as resistant and Gopal ghosh as moderately tolerant. However, Orgoja showed resistance in both field inoculation and detached sheath inoculation methods. But, Dorkumur was found moderately tolerant in field and highly susceptible in detached sheath inoculation in laboratory. The experiment of Integrated Disease Management (IDM) packages was conducted in the farmer’s field with BR11 at Fulpur, Mymensingh during T. Aman 2013. The IDM practices of rice ShB resulted profound effect. Relative lesion height, percent disease index, tiller infection and hill infection were maximum (68%, 69%, 86% and 79% respectively) in T6 (control) and minimum in T<sub>1</sub> [FDR (removal of floating debris) + 30 July transplanting + Potash (K) fertilizer (202 g decimal<sup>-1</sup>) + Top dressing of urea (247 kg ha<sup>-1</sup>) in four equal splits at 15 days interval + single spray of fungicides of Azoxystrobin 10% (0.17 kg ha-1) + Tebuconazole 90% (500 ml ha-1)]. Moreover, the highest number of panicles per m2, filled grains per panicle and grains yield were recorded in T<sub>1</sub> (160, 150 and 6.25 t ha<sup>-1</sup> respectively) and the minimum in T<sub>6</sub> (227, 120 and 3.6 t ha-1 respectively). Therefore, the best IDM package was T<sub>1</sub> for its effective control of ShB disease as well as yield maximization of rice. Finally, Orgoja could be used in resistance breeding for varietal improvement and the IDM package of T<sub>1</sub> need to be recommended to prescribe in the farmer’s field after simulation in different AEZs and seasons with different varieties of Bangladesh.</p> <p>Bangladesh Rice j. 2018, 22(2): 1-12</p> S Parveen, MA Ali, MA Ali ##submission.copyrightStatement## Thu, 14 Nov 2019 00:00:00 +0000 Morphological Characterization and Diversity of T. Aman Rice Germplasm of Bangladesh <p>Fifty-four T. Aman rice landraces were studied for 11 morphological and yield contributing characters at Bangladesh Rice Research Institute during T. Aman 2016 season. The largest variation was observed for yield per hill with 53.6% CV, followed by 1000 grain weight (29.9), number of effective tillers per hill (22.8), culm diameter (18.8), leaf width (18.4), leaf length (18.1) and days to maturity (6.7) respectively. The longest leaf was recorded as 82.2 cm and that of culm diameter as 7.57 mm, grain length as 7.2 mm and LB ratio as 3.48. The shortest days to maturity (110 days) was observed in Kajal lata and plant height (86.6 cm) in Haijam. Indursail possessed the longest panicle (31.6 cm) and the highest yield per hill (24.3 g). Based on D<sup>2</sup> values, all the germplasm were grouped into 15 clusters using Mahalonobis D2 statistic. The maximum numbers of germplasm (7) were grouped into the clusters IV with VI, whereas clusters III and XIII contained the minimum (1). The highest intra-cluster distance (1.0) was found in cluster II and the lowest (0.0) in clusters III and XIII, respectively. The inter-cluster D<sup>2</sup> values ranged from 19.2 to 0.6 indicating wide range of diversity among the germplasm. Cluster XIII showed the highest leaf length (82.2 cm) and culm diameter (6.5 mm), cluster IX the highest effective tillers per hill (13), cluster II the lowest days to maturity (117), cluster XV the highest grain length (6.1 mm) and cluster I the highest grain LB ratio (2.97), while cluster VIII showed the highest yield per hill (22.0 g), panicle length (28.8 cm) and 1000 grain weight (25.2 g), respectively. Finally, the germplasm under clusters VIII may be selected for crossing with the germplasm from clusters XIII, IX, II, XV and I for developing high yielding varieties with improved panicle length, effective tillers per hill, growth duration and grain type.</p> <p>Bangladesh Rice j. 2018, 22(2): 13-22</p> MS Ahmed, ESMH Rashid, N Akter, M Khalequzzaman ##submission.copyrightStatement## Thu, 14 Nov 2019 00:00:00 +0000 Moisture Stress and Different Rates of Nutrients on Growth and Yield of Rice <p>The experiment was conducted at the Bangladesh Rice Research Institute (BRRI) Gazipur farm during Boro 2003-04 seasons to observe the moisture stress effects in relation to nutrient rates on growth and yield of rice. The treatments were three moisture stresses (NS= Always saturated condition i.e. 1-2 cm standing water; VPS= Withholding water at the vegetative phase i.e. 15 days after transplanting (DAT) to maximum tillering stage; RPS=Withholding water at the reproductive phase i.e. PI to flowering stage) and three fertilizer doses (F0= No fertilizer; HD= Half of the optimum dose and OD= Optimum dose i.e. 120-60-40-10-2 kg ha<sup>-1</sup> of N, P<sub>2</sub>O<sub>5</sub>, K<sub>2</sub>O, S and Zn respectively). The treatments were applied in high yielding variety BRRI dhan29. The result showed that irrespective of nutrient rates, drought stress decreased plant height, tiller number and shoot dry weight. Unstressed plants (NS) produced the highest grain yield (3.14 to 6.51 tha<sup>-1</sup>) followed by vegetative phase stressed (VPS) plants (2.73 to 4.50 tha<sup>-1</sup>). The reproductive phase stressed (RPS) plants produced the lowest grain yield (2.54 to 4.20 t ha<sup>-1</sup>). Regardless of water stress, application of optimum dose (OD) of nutrients produced the highest grain yield followed by half dose (HD) of nutrients. No fertilizer treatment (F0) produced the lowest grain yield. Due to water stress, the highest grain yield reduction occurred in OD (22-32%) followed by HD (12-19%) and the lowest in F0 (4-15%).</p> <p>Bangladesh Rice j. 2018, 22(2): 23-30</p> KP Halder, MS Islam, MR Manir, MA Ali ##submission.copyrightStatement## Thu, 14 Nov 2019 00:00:00 +0000 Assessment of Variability for Floral Characteristics and Out-Crossing Rate in CMS Lines of Hybrid Rice <p>The present investigation was aimed to clarify the interrelationship among various floral traits and out crossing rates. High mean value, range of variability and genotypic variance were observed for all the traits except anther length and breadth, stigma length and breadth. Close differences between genotypic and phenotypic variances and genotypic and phenotypic coefficient of variations were observed for all the traits. Considering all genetic parameters, selection based on panicle exertion rate, angle of florate opening, duration of florate opening, anther length, stigma exertion rate and out crossing rate seemed to be effective for the improvement of CMS lines. Out crossing rate had significant positive correlation with panicle exertion rate, angle of florate opening, duration of florate opening, filament length, stigma length, breadth and exertion rate exhibited interesting results, indicating selection with these traits might be possible without compromising seed yield loss. On the basis of direct selection through panicle exertion rate, angle and duration of florate opening, filament length and stigma exertion rate would significantly improve seed yield of CMS lines. Based on mean, range, genetic parameters, correlation coefficient and path coefficient values, direct selection of eight CMS lines IR79156A, BRRI7A, IR75608A, BRRI13A, BRRI35A, BRRI48A, BRRI50A and BRRI53A might be fruitful as good floral characteristics with high out crossing rate of CMS lines.</p> <p>Bangladesh Rice j. 2018, 22(2): 31-39</p> MJ Hasan, MU Kulsum, AK Paul, PL Biswas, MH Rahman, A Ansari, A Akter, LF Lipi, SJ Mohiuddin, M Zahid Al Rafiq ##submission.copyrightStatement## Thu, 14 Nov 2019 00:00:00 +0000 Agro-morphological Characterization of Bangladeshi Aromatic Rice (Oryza sativa L.) Germplasm Based on Qualitative Traits <p>The agro-morphological characterization of germplasm is of utmost importance to generate information to be utilized in plant breeding programmes. The aim of this study was to characterize the agro-morphological traits of 113 accessions of aromatic germplasm (<em>Oryza sativa </em>L.) based on qualitative agro-morphological descriptors. No duplicates were identified among the studied accessions for qualitative traits in the cluster analysis, which means there is a high diversity among the accessions for these traits. Following UPGMA cluster analysis, 113 accessions of aromatic germplasm formed ten distinct clusters. The highest numbers of germplasm (96) were found in cluster IXd, 2 were found in cluster III, IV and VI, 3 were found in IXc and the lowest number of germplasm (1) in cluster I, II,V, VII, VIII, IXa, IXb and X, respectively. Aroma evaluation revealed that 67 germplasm were scented, 34 were lightly scented, while the rest 12 germplasm were nonscented. Germplasm namely Begun bichi, Elai, Chinigura, Basmati 370, Ranisalut, Sakkorkhora, Jirakatari, Raduni Pagal, Kalijira (long grain), Black TAPL-554, Kalgochi, BRRI dhan34, BRRI dhan50, Badshabhog-2, Tulsimala-2, Kataribhog, BU dhan2R , Sakkorkhana, Maloti, Bashful could be used for further improvement for incorporating aroma to the high yielding varieties.</p> <p>Bangladesh Rice j. 2018, 22(2): 41-54</p> MZ Islam, M Khalequzzaman, MK Bashar, NA Ivy, MM Haque, MAK Mian, M Tomita ##submission.copyrightStatement## Thu, 14 Nov 2019 00:00:00 +0000 Effect of Planting Time on Sheath Blight Disease of Rice in Bangladesh <p>Sheath blight (ShB) caused by <em>Rhizoctonia solani </em>is one of the major disease of rice (<em>Oryza sativa </em>L.) in Bangladesh. Effect of planting time on ShB disease of BRRI dhan49 was observed at the experimental plots of Bangladesh Rice Research Institute, Gazipur. Two field experiments were conducted to develop management strategy for controlling ShB during T. Aman 2010-11 seasons. Four planting dates <em>viz. </em>15 July, 30 July, 15 August and 30 August were imposed to record the effect of planting time on incidence and severity of ShB disease on BRRI dhan49. Significant differences on the Relative Lesion Height (RLH) among the treatments were observed during both 2010 and 2011 seasons. For both the seasons, the highest RLH was recorded in plots transplanted on 15 August (62.1% in 2010 and 61.2% in 2011) because of the remaining high temperature, rainfall and humidity and the lowest in plots transplanted on 30 July (19.4% for both). Similarly, the maximum severity score was recorded in 15 August transplanting (7) and the minimum in 30 July (1) respectively. Percent disease index (PDI) was also varied significantly among the treatments for both the seasons. During both the years, the maximum PDI was recorded in 15 August (76.5 and 75.2% respectively) and the minimum in 30 July transplanting (20.4 and 20.1 respectively). However, the highest number of filled grains panicle-1 was counted in 30 July (151), followed by15 July transplanting (145) during 2010. But, it was the highest in 30 July (141), followed by 15 August transplanting (136) during 2011. Again for both the seasons, the lowest filled grains panicle-1 was recorded in 30 August transplanting (116 and 127). Similarly for both the years, the maximum grain yield was observed in 30 July (6.29 and 5.82 t ha-1 respectively), followed by 15 July (5.67 and 5.17 t ha-1) and the lowest in 30 August transplanting (3.80 and 4.27 t ha-1 respectively). However, 1000 grain weight was 20 g in each date of transplanting during both the seasons. Finally, Integrated Disease Management (IDM) packages need to be developed by using appropriate planting time, cultural practices and fungicides to control ShB disease of rice.</p> <p>Bangladesh Rice j. 2018, 22(2): 55-62</p> S Parveen, MR Bhuiwan, MAI Khan, MA Ali ##submission.copyrightStatement## Thu, 14 Nov 2019 00:00:00 +0000 Performance of Prilled Urea and Urea Super Granule by Applicators on Yield and Nitrogen Use Efficiency in Boro Rice <p>A field experiment was conducted on validation of prilled urea (PU) and urea super granule (USG) applied by applicators on yield and nitrogen use efficiency during Boro 2014 season at Bangladesh Rice Research Institute (BRRI) farm, Gazipur (AEZ 28). Six treatment combinations of different N doses and methods of N application were tested to compare urea-N application by PU and USG applicator for rice yield, N uptake and N use efficiency over urea broadcasting. Application of N as PU or USG through applicator has same effect on grain yield, N uptake and N use efficiency compared with urea broadcasting. Statistically similar grain yield were observed with N application as PU or USG @ 78 kg N ha<sup>-1</sup> by applicator which was comparable with urea broadcasting @ 135 kg N ha<sup>-1</sup>. The N concentration and uptake in both panicle initiation (PI) and maturity stage were higher in USG deep placement than PU deep placement by applicators but the difference was not significant. Although agronomic use efficiency (AUE) of N was slightly higher in PU than USG applied by applicators but the recovery efficiency (RE) of N was higher in USG than PU.</p> <p>Bangladesh Rice j. 2018, 22(2): 63-69</p> ATMS Hossain, F Rahman, PK Saha ##submission.copyrightStatement## Thu, 14 Nov 2019 00:00:00 +0000 Integrated Effects of Poultry Manure and Chemical Fertilizer on Yield, Nutrient Balance and Economics of Wetland Rice Culture <p>Field trials were conducted for two years to evaluate the integrated effect of poultry manure (PM) and chemical fertilizers on yield, nutrient balance and economics of rice at BRRI, Gazipur (AEZ-28 and land type- High Land) during Boro 2009 to T. Aman 2010. Eight treatment combinations, where PM @ 1, 2, 3 t ha<sup>-1</sup> with IPNS (Integrated plant nutrient system) based dose and PM @ 1, 2, 3 t ha<sup>-1</sup> with 50% STB (soil test based) dose along with a control and 100% STB chemical fertilizer were tested. Immediate effects of manure and fertilizer were evaluated in Boro season and residual effects were observed in the following T. Aman season. Application of PM @ 2 t ha<sup>-1</sup> with IPNS based chemical fertilizer or PM @ 3 t ha<sup>-1</sup> with 50% STB dose gave higher grain yield in Boro season. Some residual effects in the succeeding T. Aman rice were observed where PM was used @ 3 t ha<sup>-1</sup>. The highest net return was obtained with 3 t PM ha<sup>-1</sup> with 50% STB dose. A positive nutrient balance of phosphorus and sulfur were observed in PM and chemical fertilizer treated plots.</p> <p>Bangladesh Rice j. 2018, 22(2): 71-77</p> F Rahman, ATMS Hossain, MR Islam ##submission.copyrightStatement## Thu, 14 Nov 2019 00:00:00 +0000 Variability Assessment of Different Maintainer Lines for Hybrid Rice Development Based on Qualitative Traits <p>The assessment of genetic diversity among nineteen maintainer lines was studied based on thirteen qualitative traits. The single linkage clustering, morphological dendogram were performed to assess the traits<em>. </em>Most of the traits showed variation in different maintainer lines except auricle colour. On the basis of flag leaf attitude, a maximum four groups were formed with erect, semi-erect, horizontal and descending type leaf angle. The maintainer line BRRI20B has awn tip, which is unique from the rest of the studied maintainer lines. Nineteen maintainer lines were grouped into four different clusters and a considerable level of variability was displayed for most of the traits examined. The clustering pattern revealed, cluster I was the largest and consisted seven maintainer lines. Among them maintainer lines BRRI52B and BRRI60B were the most closely associated. Cluster II represent diverse sources materials and its revealed non-correspondence of geographic diversity with genetic divergence. Thus the cluster analysis has revealed the genetic variation and the traits contributing for the variation. Hence, this maintainer lines can be utilized for trait improvement in breeding programmes for the traits contributing for major variation.</p> <p>Bangladesh Rice j. 2018, 22(2): 79-87</p> LF Lipi, MJ Hassan, A Akter, PL Biswas, MU Kulsum, A Ansari, MZ Islam ##submission.copyrightStatement## Thu, 14 Nov 2019 00:00:00 +0000