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A Comprehensive Study of SARS-CoV-2: From 2019-nCoV to COVID-19 Outbreak
( Abdul Waris ),( Muhammad Ali ),( Atta Ullah Khan ),( Asmat Ali ),( Abdul Baset ) 한국미생물 · 생명공학회 2020 한국미생물·생명공학회지 Vol.48 No.3
The coronavirus disease 2019 (COVID-19) is a highly contagious pneumonia that has spread throughout the world. It is caused by a novel, single stranded RNA virus called severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Genetic analysis revealed that, phylogenetically, the SARS-CoV-2 is related to severe acute respiratory syndrome-like viruses seen in bats. Because of this, bats are considered as a possible primary reservoir. The World Health Organization has declared the COVID-19 outbreak as a pandemic. As of May 27, 2020, more than 5,406,282 confirmed cases, and 343,562 confirmed deaths have been reported worldwide. Currently, there are no approved vaccines or antiviral drugs available against COVID-19. Newly developed vaccines are in the first stage of clinical trials, and it may take a few months to a few years for their commercialization. At present, remdesivir and chloroquine are the promising drugs for treating COVID-19 patients. In this review, we summarize the diversity, genetic variations, primary reservoirs, epidemiology, clinical manifestations, pathogenesis, diagnosis, treatment strategies, and future prospects with respect to controlling the spread of COVID-19.
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Hasanul Abedin,Abdullah -Al Mamun,Abdul Baset Mia,Abdul Karim 한국작물학회 2019 Journal of crop science and biotechnology Vol.22 No.4
Flash flood causes a serious damage to rice crops in northern and eastern parts of Bangladesh almost every year. This study was designed to identify useful agronomic parameters for evaluation of submergence tolerance and to evaluate genotypes by multiple agronomic parameters for submergence tolerance at different growth stages. Twenty-one aman rice genotypes were tested against three submergence treatments viz. (i) no submergence or control, (ii) submerge at 10 days after transplanting (DAT), and (iii) submerge at 30 DAT. The experiment was laid out in a split plot design with three replications. The plants were completely submerged in the tanks for 14 days. Dry matter production, growth, yield, and yield components of rice were significantly reduced due to interaction effect of genotypes × submergence. Submergence at the early stage of growth (10 DAT) was more detrimental to plant growth than what happened at later stages (30 DAT). Wide genotypic differences in relative submergence tolerance based on grain and tiller numbers were identified. Grains and tiller numbers contributed most of the variation to seed yield among parameters investigated. When genotypes were ranked for submergence tolerance based on the means of multiple parameters, dramatic changes of submergence tolerance at early and later stages were observed in four genotypes; BRRI dhan33, Lalchikon, Achin and Sadamota were identified with a favorable combination of submergence tolerance. Cluster group ranking of genotypes based on multiple agronomic characters can be applied in submergence tolerance breeding to evaluate submergence tolerance and may have great advantage over conventional methods.
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