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Physio-Biochemical and Genetic Exploration for Submergence Tolerance in Rice (<i>Oryza sativa</i>L.) Landraces with Special References to <i>Sub</i>1 Loci

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American Journal of Plant Sciences 2015年第12期6卷 1893-1904页

作者： Sayani Goswami Reha Labar anupam paul Malay Kumar Adak Narottam Dey Department of Biotechnology Visva-Bharati Santiniketan India Agricultural Training Centre Fulia India Department of Botany Plant Physiology and Plant Molecular Biology Research Unit University of Kalyani Kalyani India

In the present study a group of four indigenous and less popular rice genotypes (Meghi, Panibhasha, Jabra and Sholey) reported by growers as submergence tolerant lines from flood prone areas of south Bengal were explored through study of nodal anatomy, physio-biochemical screening under submergence and genotyping with submergence tolerance linked rice microsatellite loci (RM loci). To identify the different allelic forms of different Sub1 compnents (Sub1A, Sub1B and Sub1C) among the studied lines, the genomic DNA of individual genotypes was amplified with three ethylene response factor like genes from Sub1 loci, located on rice chromosome 9. From the different physio-biochemical experiments performed in this investigation, it has been shown that Meghi and Jabra are the two probable potent genotypes which share common properties of both submergence tolerant and deep water nature whereas rest two genotypes (Sholey and Panibhasha) behave like typical deep water rice. The submergence tolerance property of Meghi was also confirmed from submergence tolerance linked SSR based genotyping by sharing with FR13A for some common alleles as reflected in fingerprint derived dendrogram. The rest of the genotypes shared a number of alleles and were included in a separate cluster. The common behaviour of Meghi and FR13A under submergence was also confirmed from genetic study of Sub1 loci through sharing of some common alleles for three Sub1 components (Sub1A, Sub1B and Sub1C loci). One SSR loci (RM 285) was identified as a potent molecular marker for submergence tolerance breeding programme involving these two selected rice lines (Meghi and Jabra) as donor plant through marker assisted selection.

关键词： Rice Submergence Tolerance Rice Microsatellite Sub1 Loci Marker Assisted Breeding

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Spatio-temporal behaviours of tropical cyclones over the bay of Bengal Basin in last five decades

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Tropical Cyclone Research and Review 2022年第1期11卷 1-15页

作者： Manas Mondal anupam Biswas Subrata Haldar Somnath Mandal Subhasis Bhattacharya Suman paul Dept.of Geography Sidho Kanho Birsha UniversityPuruliaW.B India Dept.of Economics Sidho Kanho Birsha UniversityPuruliaW.B India

Present research is an endeavour to scrutinise the spatio-temporal climatic characteristics of tropical cyclones(TCs)bustle in the Bay of Bengal basin,found in RSMC-IMD data all through 1971–2020.A large number of TCs,i.e.121 with a decadal average of 35.2 TCs has been examined for the last 50 years where depression(D)and deep depression(DD)have not been taken into account as these are less violent in *** the study periods,inter-annual and inter-decadal variation in cyclogenesis,landfall,length,speed,track shape and sinuosity,energy metrics and damage profile have been *** study is clearly showing TCs took the northward track during the pre-monsoon season and made their landfall across the coasts of Bangladesh and Myanmar,while post-monsoon TCs made their landfall directly on the coasts of Orissa and West *** the post-monsoon phase,VF,ACE and PDI are significantly higher than in the monsoon season in the case of TCs and higher in the pre-monsoon season than in the monsoon season in the case of TCs comparing the energy metrics in different *** activity is comparatively pronounced during La Niña and El Niño regimes respectively and the genesis position in the BoB is moves to the east(west)of 87°*** the cold regime,the number of extreme TC above the VSCS category,increased *** is believed that the research findings will help stakeholders of the nation to take accurate strides to combat such violent events with persistent intensification.

关键词： Tropical cyclones RSMC-IMD Cyclogenesis Energy metrics La Niña and El Niño

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Global, 30-m resolution continuous fields of tree cover: Landsat-based rescaling of MODIS vegetation continuous fields with lidar-based estimates of error

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International Journal of Digital Earth 2013年第5期6卷 427-448页

作者： Joseph O.Sexton Xiao-Peng Song Min Feng Praveen Noojipady anupam Anand Chengquan Huang Do-Hyung Kim Kathrine M.Collins Saurabh Channan Charlene DiMiceli John R.Townshend Global Land Cover Facility Department of Geographical SciencesUniversity of MarylandCollege ParkMDUSA Department of Geographical Sciences University of MarylandCollege ParkMDUSA

We developed a global,30-m resolution dataset of percent tree cover by rescaling the 250-m MOderate-resolution Imaging Spectroradiometer(MODIS)Vegetation Continuous Fields(VCF)Tree Cover layer using circa-2000 and 2005 Landsat images,incorporating the MODIS Cropland Layer to improve accuracy in agricultural *** Landsat-based estimates maintained consistency with the MODIS VCF in both epochs(RMSE=8.6%in 2000 and 11.9%in 2005),but showed improved accuracy in agricultural areas and increased discrimination of small forest *** lidar measurements,the Landsat-based estimates exhibited accuracy slightly less than that of the MODIS VCF(RMSE=16.8%for MODIS-based vs.17.4%for Landsat-based estimates),but RMSE of Landsat estimates was 3.3 percentage points lower than that of the MODIS data in an agricultural *** Landsat data retained the saturation artifact of the MODIS VCF at greater than or equal to 80%tree cover but showed greater potential for removal of errors through calibration to lidar,with post-calibration RMSE of 9.4%compared to 13.5%in MODIS *** for free download at the Global Land Cover Facility(GLCF)website(***),the 30-m resolution GLCF tree cover dataset is the highest-resolution multi=temporal depiction of Earth’s tree cover available to the Earth science community.

关键词： tree cover continuous fields Landsat MODIS lidar

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