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Research Detail

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S. Jui
Department of Genetics and Plant Breeding, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh.

M. Hossain
Bangladesh Agricultural Development Corporation (BADC), Dinajpur, Bangladesh.

D. Devnath
Department of Genetics and Plant Breeding, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh.

B. K. Biswas
Department of Genetics and Plant Breeding, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh.

P. Upretee
Department of Genetics and Plant Breeding, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh.

Field experiments were carried out at Dinajpur, Nilphamari and Faridpur from July 2017 to March 2018 to evaluate the performance of native landraces of rice viz., Chinigura, Kataribhog, Radhunipagol, Badshabhog, Kalozira, Uknimadhu, Dudshar, Salna, Shitabhog and Zirashail to assess G x E interaction against five quantitative characters, plant height (cm),  productive tillers/hill, 1000-grain weight (g), grain yield/m2 and days to maturity, and three qualitative characters, proline (%) as µmol/g fresh weight, the aroma from green leaves and cooked rice. The field experiment was conducted in Randomized Complete Block Design with three replications. The highest grain yield (390.25 g/m2) was obtained from Radhunipagol at Dinajpur. Next to Radhunipagol, Kataribhog produced a higher grain yield (350.00 g/m2) which was significantly higher than that of Nilphamari and Faridpur but Radhunipagol was suited both for Dinajpur and Nilphamari. The cultivar, Kalozira was adapted to three locations as reflected by its regression coefficient very close to unity (b=0.92) and deviation from the coefficient estimated very near to zero (s2d=0.16). Maximum proline was estimated (18.7 µmol/g fresh weight) from Chinigura cultivated at Dinajpur. The proline (%) estimated average from Kalozira at three locations and the range varied from 14.00 -15.90 µmol/g fresh weight. Dinajpur appeared as the best and Faridpur as an unfavorable location for local aromatic rice cultivars. Since aroma was assessed through the sensory method the maximum aroma was assessed from Chinigura under Dinajpur but its content gradually decreased at Nilphamari and Faridpur. The aroma assessed from cooked rice ranged from 7.05-8.90 over three locations but the maximum aroma was assessed under Dinajpur. Chinigura, Radhunipagol and Kataribhog found suitable for Dinajpur, and Kalozira and Badshabhog might suggest cultivating over the locations of Bangladesh.

  Aroma assessment; Grain yield; Primitive cultivars; Proline content.
  Plant Breeding Research Farm, Hajee Mohammad Danesh Science and Technology University (HSTU), Dinajpur
  00-07-2017
  00-03-2018
  Variety and Species
  Rice

To determine the stability and response to varying environments based on agro- morphological and quality characters like proline and aroma contents in primitive cultivars of rice.

The experiment was conducted from July 2017 to March 2018 in three locations viz., Plant Breeding Research Farm, Hajee Mohammad Danesh Science and Technology University (HSTU), Dinajpur, Seed Multiplication Farm, Nilfamari and Seed Multiplication Farm, Faridpur. The farms are under BADC (Bangladesh Agricultural Development Corporation). Ten native landraces of rice such as Chinigura, Kataribhog,  Radhunipagol,  Badshabhog, Kalozira, Uknimadhu, Dudshar, Salna, Shitabhog, and Zirashail were integrated into the study. The seedlings were raised at three locations and 25 days old seedlings were transplanted with the spacing of 20 cm x 20 cm. Recommended doses of fertilizers such as cowdung (5 t/ha), 100 kg/ha urea, 25 kg/ha TSP, and 45 kg/ha MOP were applied. The experimental design was a randomized complete block design with three replications. The individual plot size was 2 m x 3 m. Ten plants were randomly selected at maturity and five quantitative characters viz., plant height (cm), productive tillers/ hill, days to maturity, 1000- grain weight and grain yield/m2 were recorded. To estimate proline from each landrace, fresh green leaves (0.5 g/sample) were collected location and plot basis and carried in 70% ethanol to the Genetics and Plant Breeding Laboratory, HSTU, Dinajpur. The leaves were grounded to powder and then homogenized with 10 ml of 3% (w/v) sulpho salicylic acid and passed through a Whatman 2 filter paper. A reagent, 2 ml ninhydrin, and 2 ml glacial acetic acid were added to the 2 ml filtrated extract. The mixture was incubated at 100°C in a water bath for one hour. The reaction mixture was placed on ice and excreted with 4 ml toluene. Absorption of chromospheres was read at 250 nm using Perkin’s lambda 900 uv/vis spectrophotometer. Toluene was used as blank. The proline concentration was calculated using L-proline corresponding to aroma content as suggested by [16]. The proline content on fresh-weight-basis as µ moles per g tissue = µg proline/ml x ml toluene/115.5 × 5/g sample Aroma characteristics of the fine rice cultivars were measured by tasting individual plant leaves and cooked rice. Following the method used by [17] one gram of the first green leaf blades at the heading, stage was cut into small pieces and put into Petri dishes with 5 mL of 1.7% KOH solution at room temperature. Similarly, 200 g of milled grain was taken and cooked over a mini rice cooker. For both treatments, after 30 minutes, the dishes were opened and immediately smelled by an individual member of a six-member panel and aroma content was assessed through a 1-9 scale [18]. The stability of yield performance for each cultivar was calculated by regressing the mean grain yield of individual genotypes on the environmental index and calculating the deviations from regressing of the mean yield against individual cultivar on an environmental index as suggested by [12]. Regression coefficient (bi) was considered as an indication of the stability of the cultivars while the deviation of from regression coefficient (s2di) as the response of the cultivars over the three locations. The data obtained for different characters were recorded first on an MS excel sheet. Afterward, the data were analyzed using the software package R of version 3.4.2 and Statistical Tools for Agricultural Research (STAR) Version: 2.0.1.

 

  Asian Research Journal of Agriculture - 13(1): 10-20, 2020
  DOI: 10.9734/ARJA/2020/v13i130093
Funding Source:
1.   Budget:  
  

The farmers of Bangladesh are cultivating traditional fine rice cultivars of low yielding and the potential of the landraces are mostly location specific, therefore, there is an urgent need to identify the suitable cultivars at least with above-average yield and aroma content obtained over the locations, which would fulfill the demand of the farmers for want of superior fine rice cultivars. The growing season of these cultivars is almost rainfed, so farmers merely apply supplementary irrigation into crop fields. If a cultivar showed considerable yield with a high aroma would be more beneficial to the farmers because of the high market price as compared to coarse rice. In light of the above scenario, it may be resolved that aromatic rice cultivars were low yield potential and high aroma content was observed at the Dinajpur region whereas, these characters couldn’t be improved only through changing the locations. The cultivars, Chinigura, Kataribhog, and Radhunipagol were most adaptable to Dinajpur conditions; Kalozira with average aroma content may be recommended to cultivate across the three locations however, Badshabhog suitable for cultivation in both Dinajpur and Nilphamari conditions. Therefore, the cultivars Chinigura, Kataribhog, Radhunipagol, Kalozira and Badshabhog might forward for cultivation at specific locations of Bangladesh.

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