scholarly journals Longevity of Bipolaris oryzae on HEERA-2 Hybrid Rice Seed

2021 ◽  
Vol 12 (1-2) ◽  
pp. 209-213
Author(s):  
US Monira ◽  
MA Ali ◽  
A Sultana ◽  
R Islam
Keyword(s):  
Hybrid Rice ◽  
Agricultural Research ◽  
Rice Variety ◽  
Storage Condition ◽  
Rice Seed ◽  
Bipolaris Oryzae ◽  
Statistical Tool ◽  
Pathology Laboratory ◽  
Seed Processing ◽  
Seed Pathology

Seeds of hybrid rice variety Heera-2 was collected from Mymensingh district in Bangladesh. Longevity of Bipolaris oryzae was studied in 2012 to 2016 at Seed Pathology Centre, Bangladesh Agricultural University, Seed processing &preservation center and Seed Pathology Laboratory of Supreme Seed Company Limited. The data collected from the experiments were analyzed for test of significance and compared the treatment means by using DMRT at 5% level of probability following the Statistical tool for Agricultural Research (STAR) 2.1 program.The longevity of B. oryzae was observed till five years by blotter incubation methods, seedling symptom test and growing on test. Both untreated and seeds treated with Vitaflo 200FF (carboxin and thiram) were kept in jute bag and polybag stored for five years under both normal and dehumidified condition. The inocula of B. oryzae on Hybrid Heera 2 seed remained viable up to five years. When the seed samples were stored under dehumidified condition, the highest incidence of B. oryzae was recorded in case of jute bag after five years. After treated with Vitaflo 200FF, there was no any infection of B. oryzae under both storage condition Environ. Sci. & Natural Resources, 12(1&2): 209-213, 2019

Techno-economic performance of mechanical transplanter for hybrid variety of rice in unpuddled soil

2020 ◽  
Vol 30 (4) ◽  
pp. 405-413
Author(s):  
MS Basir ◽  
M Ashik-E-Rabbani ◽  
S Sarkar ◽  
MM Alam
Keyword(s):  
Hybrid Rice ◽  
Financial Analysis ◽  
Rice Variety ◽  
Field Capacity ◽  
Effective Field ◽  
High Yield ◽  
Agricultural Practice ◽  
Rice Seed ◽  
Protective Behavior ◽  
Transplanted Rice

Unpuddled transplanting of rice as a part of conservation agricultural practice has become significant due to its protective behavior for soil properties and economic profitability. Mechanical transplanting in unpuddled soil using hybrid rice variety leads to a high yield with minimum transplanting time and cost, securing soil nutrients. A study was conducted in Bangladesh Agricultural University to evaluate the efficacy of mechanical transplanting of hybrid rice in unpuddled soil considering field and financial performances of rice transplanter. The experiment was conducted during Boro-2018 season with a Daedong DP-480 rice transplanter. Hybrid rice seed Moyna (HTM303) of Laal Teer seed company Ltd. was used for transplanting at a seed rate of 120g per tray and seedling per hill was adjusted to 2-3 nos. In unpuddled soil, transplanter possessed an effective field capacity, fuel consumption and efficiency of 0.16 ha/h, 4.8 l/ha and 67.48%, respectively. Transplanting time included an idle time of 11% due to clogging with mud. Missing hill percentage was found as 6.1% with a floating hill of 7.36%. Plant heights were 15.72 cm and 86.19 cm at the day of transplanting and at the day of harvesting, with tiller per hill of 18 nos. The average panicle length of plants was found as 23.6 cm where traditionally transplanted rice has panicles of 21.2 cm average. The yields of mechanically transplanted rice in unpuddled soil condition was 5.21 ton/ha and the yield of mechanical transplanted rice in unpuddled soil was found to be 27.07% higher than traditionally transplanted rice. The BCR and IRR of mechanical transplanting in unpuddled soil was found 1.57 and 55% considering 10% discount factor. The payback period, after which the transplanter will overcome its costs, was found 1.68 years. Financial analysis reveals that mechanical transplanting with this field capacity will be beneficial if the transplanter is used to transplant 19.77 ha annually. Progressive Agriculture 30 (4): 405-413, 2019

scholarly journals Effect of Storage Condition on Seed Quality of Some Dhaincha (Sesbania spp.) Accessions

2016 ◽  
Vol 14 (1) ◽  
pp. 83-91
Author(s):  
M Towhidul Karim ◽  
Fazlul Haque ◽  
A K M Golam Sarwar ◽  
M Ayub Ali
Keyword(s):  
Room Temperature ◽  
Seed Quality ◽  
Storage Condition ◽  
Storage Conditions ◽  
Pathology Laboratory ◽  
Seed Pathology ◽  
Vigour Index ◽  
Long Time ◽  
Fusarium Sp

An experiment was conducted at the Seed Pathology Laboratory, Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh, to understand the effect of storage conditions on seed quality of different accessions of dhaincha (Sesbania spp.). Seeds of twenty accessions were collected and stored in a refrigerator (4°C) and laboratory at normal room temperature (25-30°C). Sprouting (%), germination (%), vigour index and the incidence of seed-borne pathogens were recorded following ISTA procedures. Germination and emergence were higher when seeds were stored in the refrigerator than those in room temperature. The vigour index was also high when the seeds were stored in a refrigerator. Fungi belonging to genera Aspergillus, Fusarium, Rhizopus, and Penicillium were associated with seeds of the different accessions of dhaincha. Seed borne infection of Fusarium sp. was highest (14%) in G-13 when seeds were stored at room temperature. It was evident from the results that the quality of the seeds of dhaincha accessions was retained for a long time when they were stored at low (around 4°C) temperature.The Agriculturists 2016; 14(1) 83-91

scholarly journals Effect of Planting Density on the Performance of Hybrid Rice (Oryza sativa L.) under Waterlogged Condition

2014 ◽  
Vol 11 (2) ◽  
pp. 109-113 ◽  
Author(s):  
MS Islam ◽  
MM Rashid ◽  
MK Mondal ◽  
SC Nath ◽  
MR Karim
Keyword(s):  
Hybrid Rice ◽  
Agricultural Research ◽  
Oryza Sativa L ◽  
Block Design ◽  
Rice Variety ◽  
Planting Density ◽  
Wet Season ◽  
Waterlogged Condition ◽  
Agricultural Research And Development ◽  
Development Center

The experiment was conducted to find out the effect of planting density on the performance of hybrid rice variety Aloran under water logged condition at the BRAC Agricultural Research and Development Center in Gazipur, Bangladesh during the dry (DS) and wet season (WS) of 2009. Different planting densities were maintained using different spacings and number of seedlings per hill. These include 25 cm × 20 cm, 25 cm × 10 cm, 20 cm × 10 cm, 20 cm × 15 cm with single seedling per hill and 20 cm × 15 cm with two seedlings per hill and 20 cm × 15 cm with three seedlings per hill. The experiment was laid out in a randomized complete block design with 3 replications. Density of 20 cm × 10 cm with 1 seedling hill-1 i.e. 50 hills m-2 produced the highest grain yield of 7.5 t ha-1 and 4.6 t ha-1 in DS and WS respectively, which was significantly higher than the yield with recommended density (20 cm × 15 cm with 1 seedling per hill). This yield was increased due to higher number of panicles m-2. Increasing the seedling numbers hill-1 with the recommended planting density did not improve the yield of hybrid rice. This result suggests that higher planting density rather than increased number of seedling hill-1 is necessary for getting higher yield of hybrid rice in continuous water logged condition. DOI: http://dx.doi.org/10.3329/agric.v11i2.17497 The Agriculturists 2013; 11(2) 109-113

scholarly journals Floral traits and flowering behaviors of Malaysian rice cytoplasmic male sterile and maintainer lines and its relationship with out-crossing performance

2021 ◽  
pp. 180-186
Author(s):  
Shahida Hashim ◽  
Phebe Ding ◽  
Mohd Firdaus Ismail ◽  
Asfaliza Ramli
Keyword(s):  
Seed Production ◽  
Hybrid Rice ◽  
Agricultural Research ◽  
Floral Traits ◽  
Rice Seed ◽  
Male Sterile ◽  
Floral Trait ◽  
Cytoplasmic Male Sterile ◽  
Cross Pollination ◽  
Parental Lines

Rice is a strictly self-pollinating crop. However, in hybrid rice seed production, an effective male sterility system is used to produce hybrid seed in bulk. In hybrid rice system, the pollen grains of cytoplasmic male sterile (CMS) are sterile and the female organ of the CMS depends on the fertile pollen released by the maintainer or restorer lines via out-crossing or cross-pollination in order to produce seed. Floral trait and flowering behavior of CMS and its corresponding maintainer or restorer lines are essential factors in hybrid rice seed production because they influenced the out-crossing or cross-pollination between parental lines. Two local CMSs and their corresponding maintainer lines were developed through breeding program in Malaysian Agricultural Research and Development Institute (MARDI) namely 0025A/0025B and 0047A/0047B. This study was carried out on floral traits and flowering behavior of these two hybrid line. Present studies have shown that there were variations between the CMS and its maintainer lines whether on floral trait or flowering behavior for both hybrid rice combinations. The results showed that stigma characters for both 0025A and 0047 were superior than their respective maintainers. Therefore, it is expected that the out-crossing rate would be high. Seeding date intervals need to be done on 0025A/0025B during nursery stage because the on-set of flowering between parental lines was significantly different. Panicle of both CMS was also classified as just exserted and partially-exserted and application of exogenous hormones such as gibberellic acid was useful to improve panicle elongation and consequently increase the seed set and yield. Correlation study indicates that the stigma area of both 0025A and 0047A has significant positive correlation with out-crossing rate.

scholarly journals Willingness to Accept dan Willingness to Pay Petani dan Konsumen terhadap Padi Hibrida di Sentra Produksi Jawa Timur

2016 ◽  
Vol 35 (1) ◽  
pp. 53 ◽  
Author(s):  
Made Oka Adnyana ◽  
Putu Wardana
Keyword(s):  
Willingness To Pay ◽  
Hybrid Rice ◽  
Contingent Valuation Method ◽  
Rice Variety ◽  
Willingness To Accept ◽  
Rice Seed ◽  
Milled Rice ◽  
Rice Farmers ◽  
Valuation Method ◽  
Hybrid Variety

Research on hybrid rice in Indonesia was initiated in 1983, in collaboration with the International Rice Research Institute. Since 2000 private sector had indicated their interest in hybrid rice seed business. Planted area of hybrid rice in Indonesia was still relatively small of about 658 thousand hectares or about 5.0 percent of the total rice planted area of 13.2 million hectares in 2013. This study was aimed to analyze farmers’ responses and preferences to the development of hybrid rice in East Java, one of the rice production center in Indonesia. Contingent valuation method (CVM) to analyze farmers’ Willingness to Accept (WTA) and Willingness to Pay (WTP) with respect to various factors was then exercised to evaluate constraints and prospect of the future of hybrid rice development in Indonesia. The outputs of this study showed that farmers’ preferences to hybrid rice based on its taste was positive, especially to the newly introduced hybrid rice variety “Hipa Jatim”, when compared with the previous hybrid varieties, such as Maro and Rokan. WTA and WTP also showed significant farmers’ interests to the hybrid variety, due to higher yield and its better taste, similar to that of popular inbred rice. Farmers’ WTAs of hybrid rice was significantly influenced by the productivity, response to pests and deseases, and the total cost of production, while consummers’ WTPs of hybrid rice was significantly influened by the quality of milled rice.

scholarly journals Performance of hybrid rice grown from separated tillers

2019 ◽  
Vol 17 (4) ◽  
pp. 507-513
Author(s):  
FN Kamarum Munira ◽  
Md. Parvez Anwar ◽  
Sabina Yeasmin ◽  
Md. Harun Or Rashid ◽  
Mst Farzana Rahman ◽  
...  
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Hybrid Rice ◽  
Rice Variety ◽  
Field Laboratory ◽  
Split Plot ◽  
Rice Seeds ◽  
Four Levels ◽  
Plot Design

The experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during July to November 2016 to investigate the performance of separated tillers of hybrid rice variety Dhani Gold. The experiment comprised three times of tiller transplantation viz. 3, 4 and 5 week aged tiller seedlings and four levels of number of tiller seedlings transplanted hill-1 viz. 2, 3, 4 and 5 tiller seedlings hill-1 laid out in a split plot design with 3 replications. The highest plant height was obtained when 3-week aged tiller seedlings were transplanted at the rate of 3 tiller seedlings hill-1. The highest number of total tillers hill-1 and number of effective tillers hill-1 were found when 3-week aged tiller seedlings were transplanted with 5 tiller seedlings hill-1. The highest grains panicle-1 was obtained when 4-week aged tiller seedlings were transplanted with 5 tiller seedlings hill-1. The highest grain yield was found when 3-week aged tiller seedlings were transplanted with 5 tiller seedlings hill-1. The lowest grain yield was found when 5-week aged tiller seedlings were transplanted with 2 tiller seedlings hill-1 in hybrid rice variety Dhani Gold. Based on the findings of the present study it may be concluded that 3-week old tiller seedlings of Dhani Gold should be transplanted at the rate of 4 or 5 tiller seedlings hill-1 for higher yield. Thus present study confirms the potentiality of growing hybrid rice from separated tillers in case of unavailability of seedlings or to minimize the seed cost of high value hybrid rice seeds. J Bangladesh Agril Univ 17(4): 507–513, 2019

scholarly journals Detection of QTLs for Outcrossing-Related Traits in CSSL Population Derived from Primitive Japonica Accession Ludao in the Genetic Background of O. sativa spp. Japonica Restorer C-bao Using RSTEP-LRT Method

Agronomy ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 28
Author(s):  
Lal Bux ◽  
Dalu Li ◽  
Muhammad Faheem ◽  
Nour Ali ◽  
Muzafar Hussain Sirohi ◽  
...  
Keyword(s):  
Seed Production ◽  
Hybrid Rice ◽  
Oryza Sativa L ◽  
Flag Leaf ◽  
Leaf Angle ◽  
Ratio Test ◽  
Phenotypic Variance ◽  
Rice Seed ◽  
Hybrid Seed Production ◽  
Cms Line

The outcrossing traits in rice (Oryza sativa L.) affect the yield of hybrid seed production. Using a cytoplasmic male sterile (CMS) line with good outcrossing traits, such as short flag leaf length (FLL), narrow flag leaf width (FLW), wide flag leaf angle (FLA), and elongated panicle neck length (PNL), for hybrid rice seed production, it is possible to avoid the procedure of cutting flag leaves and make the supplementary pollination feasible by machine. In this study, a japonica restorer C-bao as the receptor parent and a primitive japonica accession Ludao as the donor parent were used to construct a chromosome segment substitution line (CSSL) population. The CSSL population was used to detect quantitative trait loci (QTLs) for the four outcrossing traits using a likelihood ratio test based on the stepwise regression (RSTEP-LRT) method. The CSSL population constructed consisted of 163 lines covering 90.7% of the donor genome. Among the seven QTLs detected in the CSSL population, four QTLs were detected in both years. qFLL-4 explained 6.70% of the two-year-averaged phenotypic variance, and the alleles from Ludao decreased FLL 5.1 cm. qFLA-1.1 and qFLA-1.2 explained 7.85% and 21.29% of the 2-year-averaged phenotypic variance respectively, and the alleles from Ludao increased FLA 17.38° and 31.50°. qPNL-8 explained 8.87% of the 2-year-averaged phenotypic variance, and the alleles from Ludao increased PNL 4.44 cm. These favorable alleles identified could be used to improve the outcrossing traits of parents for hybrid rice seed production in rice.

scholarly journals Evaluation of Some Indigenous Plant Extracts for Suppressing Bipolaris sorokiniana in Wheat Seed

2010 ◽  
pp. 96-104
Author(s):  
Rokshana Panna ◽  
FM Aminuzzaman ◽  
MR Islam ◽  
MHM Borhannuddin Bhuyan
Keyword(s):  
Seed Germination ◽  
Plant Extracts ◽  
Leaf Extract ◽  
Bipolaris Sorokiniana ◽  
Leaf Extracts ◽  
Pathology Laboratory ◽  
Black Cumin ◽  
Seed Pathology ◽  
Indigenous Plant ◽  
Black Cumin Seed

Studies were conducted in the Seed Pathology Laboratory, Department of Plant Pathology, Sher-e-Bangla Agricultural University to evaluate some indigenous plant extracts on the incidence of Bipolaris sorokiniana of wheat and seed germination. Seed treated with plant extracts reduced the incidence of Bipolaris sorokiniana. The lowest incidence was counted (12.33%) in seeds treated with Burmuda grass extracts (1:2W/V). While the highest seed germination (99.60%) was recorded in seeds treated with this grass extract followed by 99.33% germination in seeds treated with Neem leaf extract (1:2W/V), 98.00% with nut sedge grass rhizome extract (1:2 W/V), 87.67% with Allamanda leaf extract (1:2W/V). Comparatively the lowest incidence of Bipolaris sorokiniana (14.00%) was observed in seeds treated with Neem leaf extracts (1:2W/V) followed by 14.50% in seeds treated with Nut sedge grass rhizome extracts (1:2W/V), Black cumin seed extracts (15.20%) and Allamanda leaf extract (24.00%).

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