In vitro regeneration of tossa jute through callus culture

ABSTRACT

This research work has been done on the creation of desired variants through somaclonal variation by producing callus tissue from the in vitro regeneration of jute (Corchrous olitorius L. Var O-9897). The work was carried out in 2024 at the tissue culture lab of the Cytogenetics Department, Bangladesh Jute Research Institute. Sterile seeds were grown in semisolid agar media without using growth regulators. After 5 to 6 days healthy and sterile plantlets were found (germination above 95%). Cotyledonary shoot tip was used as an explant for in vitro germinated seedlings. After two weeks of cotyledonary shoot tip culture,friable and small size (2.2-4.2 mm) callus growth was found in a medium containing (BAP 2.5 + IAA 0.5), (BAP 0.2 + IAA 1.0); (NAA 0.75+BAP 3.5 + IAA 0.75)and only BAP 2.0with 3% sugar, 1% agar and pH was adjusted at 5.8. Cultures were placed in a growth room with 26 ± 20C under 3000 lumens of fluorescent tubes with 16h photoperiod. Fresh callus was subculture on different concentration and combination of hormone treatments (11 types) for shoot regeneration. MS medium without hormone (control) and with hormone BAP 2.5 + IAA 0.5 and BAP 2.0 gave shoot initiation successfully.

Key words: Tossa jute, callus, hormone, shoot tip and somaclonal variation

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A study on yield levels of wheat as affected by flobond under different irrigation regimes

ABSTRACT

A pot experiment was conducted at the Net house of Department of Agronomy, Bangladesh Agricultural University, Mymensingh to study the effects of rate of flobond and level of irrigation on yield dimensions of wheat cv. BARI GAM-19 (Sourov). The experiment comprised of two factors (a) rate of flobond viz., 0, 0.5, 1.0, 2.0, 4.0 and 8.0 g pot-1 and (b) three level of irrigation viz., control, one irrigation at 18 DAS, two irrigation at 18 and 55 DAS, three irrigation at 18, 55 and 80 DAS. The experiment was laid out in a completely randomized design with three replications. The study explored that the grain yield of wheat (21.38 g pot-1/3.06 t ha-1) was found highest with 2 g flobond pot-1 (332 kg ha-1). Biological yield (8.41 t ha-1) and straw yield (38.14 g pot-1/5.45 t ha-1) were highest with 4 g flobond pot-1 (664 kg ha ha-1). On the other hand, all types of yield and harvest index were lowest with no flobond. Again considering irrigation levels,  the grain yield (23.88 g pot-1/3.41 t ha-1), biological yield (8.26 t ha-1) and harvest index (41.40%) were highest with two irrigations treatment. Only straw yield (34.15 g pot-1/4.88 t ha-1) was highest under three irrigations. All types of yield and harvest index were lowest with no irrigation. Considering interaction effects, the straw yield was higher (5.75 t ha-1) with 4 g flobond pot-1 (664 kg ha-1) with two irrigations and the lowest one (21.50 g pot-1/4.47 t ha-1) was found in no flobond and no irrigation. Harvest index (43.85%) was higher with 2 g flobond pot-1 (332 kg ha-1) with two irrigations. All most all types of yield and other yield characters were lowest in no flobond and no irrigation.

Key words: Wheat yield, flobond, irrigation regimes.

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Rice improvement through marker-assisted selection for salinity tolerance: a review

ABSTRACT

Marker Assisted Selection (MAS) has recently advanced, resulting in the creation of more effective selection paraphernalia to replace the phenotype-based conventional selection. For MAS, some genes associated with unique traits with molecular markers have been discovered. In the last decade, molecular marker technologies have advanced rapidly, allowing for the development of linkage maps, marker-assisted breeding (MAB), and molecular dissection of complex agronomical traits. The MAB method involves transferring a single allele at a target locus from a donor variety or line to a recipient variety or line against donor introgressions around the genome when selecting. At each generation using a molecular marker allows for progenies genetic dissection, speeding up the selection process, resulting in greater genetic benefit per unit of time. Nowadays, MABC (Marker Assisted Backcross Breeding) is being used widely in plant breeding programs to develop new varieties/lines, especially in rice. This paper reviews recent literature on some examples of salt-tolerant rice variety/line development using the MAS technique in rice-growing countries within the shortest timeframe.

Key words: Conventional breeding, gene, marker-assisted selection, rice, salinity.

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Effect of chemical water retainer and irrigation on the growth and yield of wheat

ABSTRACT

A modem wheat variety BARI GAM-19 (Sourov) was grown with six rates of flobond, a chemical water retainer, viz., 0.0, 0.5, 1.0, 2.0, 4.0 and 8.0 g pot-1 under three levels of irrigation viz., control, one irrigation at 18 DAS (days after sowing), two irrigations at 18 DAS and 55 DAS, three irrigations at 18 DAS, 55 DAS and 80 DAS at the net house of the Department of Agronomy, Bangladesh Agricultural University, Mymensingh. Rate of flobond and irrigation level and their interaction exerted significant influence on yield, yield contributing and other crop characters. It was observed that the highest grain yield (3.06 t ha-1) was obtained with 2 g flobond pot-1 (332 kg ha-1). It was the outcome of the highest effective tillers plant-1 and highest number of grains spike-1. Grain yield showed an increasing trend up to 2 g flobond pot-1 (332 kg ha-1) and thereafter, it may identical.  Considering, irrigation frequencies the highest grain yield (3.41 t ha-1) was obtained with two irrigations. Interaction of rate of flobond as chemical water retainer and level of irrigation had significant effect on yield, yield contributing and other crop characters except plant height, spike length, 1000-grain weight. However, the highest grain yield (3.58 t ha-1) was obtained with two irrigations coupled with 2 g flobond pot-1 (332 kg ha-1) as chemical water retainer and the lowest one (1.37 t ha-1) was obtained in no flobond and no irrigation.

Key words: Flobond, irrigation, wheat, yield.

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Amitav Ghosh’s Ecocritical canvas: a literary exploration of environmental consciousness

This paper delves into the realm of ecocriticism in the literary works of acclaimed Indian author Amitav Ghosh. Recognized for his ability to weave intricate narratives that intertwine history, culture, and the environment, Ghosh’s novels present a rich tapestry of human experiences set against the backdrop of ecological challenges.The paper explores how Ghosh employs ecocritical perspectives to articulate the intricate connections between humans and the environment, offering nuanced reflections on the impacts of globalization, climate change, and human activities on the natural world. By analyzing The Hungry Tide, the Ibis Trilogy and The Great Derangement, this paper aims to illuminate Ghosh’s contribution to the environmental discourse within the context of contemporary literature.

Key words: Ecocriticism, environment, literature

Prof. Sattar recognized with Sher-e-Bangla golden award in education

Prof. Dr. M.A. Sattar, College of Agricultural Sciences (CAS), International University of Business Agriculture and Technology (IUBAT), Uttara, Dhaka received the Sher-e-Bangla Golden Award in Education on May 26, 2023 at Dhaka that was awarded by Sher-E-Bangla A.K. Fazlul Hoque Research Council, Dhaka. His brief academic career is outlined here covering 50 years of teaching services at four universities in Bangladesh.

Prof. Dr. M.A. Sattar is a renowned International agriculture, soil, pesticide and environmental scientist; researcher, inventor, educator, poet, writer, journalist and philosopher served 42 years at BAU, Mymensingh as Head, Dean-Agriculture and Syndicate Member and 5 years at BSMRSTU, Gopalganj as Chairman, Dean-Life Science and Regent Board Member where actively contributed to more than 50 major univ. committee as chairman, president and/or member, 7 months at Fareast Inter. Univ., Dhaka and from January 2023 to IUBAT, Dhaka.

His academic degrees covered BScAg (Hons), MSc(Ag), LicPhil, DPhil, DSc., ScD and Postdoc, i.e. have 4-PhD equiv. degrees as first Bangladeshi scientist; handled wide research in Finland (JKL University, 1976-84); Visha Bharati University, India; Punjab University, Pak.; Kiel University and Duisburg University, Germany; has more  than 2,000 publications like International Journal-40, National Journal-250, Conference proced.-50, conf. Abstr.-190, newspaper-650 (1989-92), books-245, Bangabandhu’s live and philosophy-5, Text books-20, supervision of PhD-15, MSc(Ag)/MS-125, Models-250, awareness slogan-500; if book-chapters are separated then comes/covers 10,000 more articles/chapter from 245 books; presented articles 100+ confs., member-25 sci. soc., visited 80 cities of 30 countries, organized 6-national environ. confs., delivered 65-environ. awareness lectures as chief/special guests, received 30 national/International awards like as Bangladesh Academy of Science Gold Medal in 1988 (1st Agriculturist & environment scientist), and Gold Medal for Bangladesh etc.; developed first Environ. Science Society in Bangladesh in 1992 and also developed first Environ. Journal (Bangladesh Journal of Environmental Science) in 1994 (published 43 vols) as Editor-in-Chief.

He has lot of field and lab research on basic, applied, fundamental and survey contributions of 75-80 major patent/areas on agriculture, soil science, environment science, pesticide science, climate changes, biodiversity, food safety and security, population dynamics, rural and urban environments, arsenic and 12-22 heavy metals (50 publications); improved, developed and established analysis methods of MCPA, MCPA+ metabolites phenoxyherbicides, organochlorine and organophosphorus pesticides, chlorinated catechol, cresol and phenol; invented 2-hazardous metabolites of MCPA; residues of pesticides. Books and newspaper articles covered 18-25 areas. He is pioneer on Education and Research in Bangladesh in Environmental science (1972-2023); Pesticide science (1976-2023); Soil pollution (1972-2023); Arsenic and heavy metals in soils and crops (1996-2023); Food safety guideline against pesticides (1976-2023) and Heavy metals (1996-2023) and schematic models in science (1976-2023), literature (1976-2023), and Bangabandhu’s Life (2015-2023). His wife (Rtd.) Prof. Dr. Afroza BA(Hons), M.A., LicPhil, PhD, Postdoc. pioneer on Disaster Management Education and Research in Bangladesh (1976-1984, Helsinki Univ., Finland). First woman Principal at Bangladesh Cadet College Services; son Dr. Sanyat Sattar BA (Hons), MA, PhD, Postdoc., Prof., JU, and daughter Dr. Klaara, MBBS, FCPS, BCS Consultant, Physician, Govt. of Bangladesh.