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Assam Agricultural University, Jorhat

Assam Agricultural University is the first institution of its kind in the whole of North-Eastern Region of India. The main goal of this institution is to produce globally competitive human resources in farm sectorand to carry out research in both conventional and frontier areas for production optimization as well as to disseminate the generated technologies as public good for benefitting the food growers/produces and traders involved in the sector while emphasizing on sustainability, equity and overall food security at household level. Genesis of AAU - The embryo of the agricultural research in the state of Assam was formed as early as 1897 with the establishment of the Upper Shillong Experimental Farm (now in Meghalaya) just after about a decade of creation of the agricultural department in 1882. However, the seeds of agricultural research in today’s Assam were sown in the dawn of the twentieth century with the establishment of two Rice Experimental Stations, one at Karimganj in Barak valley in 1913 and the other at Titabor in Brahmaputra valley in 1923. Subsequent to these research stations, a number of research stations were established to conduct research on important crops, more specifically, jute, pulses, oilseeds etc. The Assam Agricultural University was established on April 1, 1969 under The Assam Agricultural University Act, 1968’ with the mandate of imparting farm education, conduct research in agriculture and allied sciences and to effectively disseminate technologies so generated. Before establishment of the University, there were altogether 17 research schemes/projects in the state under the Department of Agriculture. By July 1973, all the research projects and 10 experimental farms were transferred by the Government of Assam to the AAU which already inherited the College of Agriculture and its farm at Barbheta, Jorhat and College of Veterinary Sciences at Khanapara, Guwahati. Subsequently, College of Community Science at Jorhat (1969), College of Fisheries at Raha (1988), Biswanath College of Agriculture at Biswanath Chariali (1988) and Lakhimpur College of Veterinary Science at Joyhing, North Lakhimpur (1988) were established. Presently, the University has three more colleges under its jurisdiction, viz., Sarat Chandra Singha College of Agriculture, Chapar, College of Horticulture, Nalbari & College of Sericulture, Titabar. Similarly, few more regional research stations at Shillongani, Diphu, Gossaigaon, Lakhimpur; and commodity research stations at Kahikuchi, Buralikson, Tinsukia, Kharua, Burnihat and Mandira were added to generate location and crop specific agricultural production packages.

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20211
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Subject: Agricultural Biotechnology × Author: Roy, Nabarun × End date: 2021 × Start date: 2021 × Type: Thesis ×
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    ThesisItemOpen Access
    Mapping of drought tolerant QTLS in upland Rice variety Banglami
    (2021) Roy, Nabarun; Modi, Mahendra Kumar
    The study entitled ‘Mapping of drought tolerant QTLs in upland rice variety Banglami’ was taken up to identify the drought tolerant QTLs in Banglami, a local medium duration upland low yielding landrace of Assam which is drought tolerant. For this a mapping population was developed by crossing Banglami with Ranjit, an elite long duration high yielding photosensitive and drought susceptible variety of Assam. QTL mapping was done in this population with the use of SSR markers by Verma et al. (2017a) and Sharma et al. (2017) and several QTLs were mapped. But with the demand of latest technology which needs QTLs within narrow confidence intervals so that they can be used precisely in any breeding programme without much problem of linkage drag, the present work done became demanding as Genotyping by sequencing (GBS) technology was used to find out SNP markers which will now flank the mapped QTLs. For this, the mapping population was evaluated for 2 consecutive seasons for several yield and agronomic traits under both reproductive stage drought stress and control condition. The phenotypic data collected was associated with genotypic data to form a high density/saturated linkage map. 4646 polymorphic informative SNPs were assigned to 12 linkage groups (LGs) covering a total of 1306.424 cM of the rice genome at an average marker distance of 0.32 cM. A total of 65 QTLs were mapped which explained a PVE of 1.95- 13.80% with LOD scores ranging from 2.5- 31.6, out of which 30 QTLs were mapped from stress data, whereas 35 QTLs were mapped from non stress data. Out of these only 5 QTLs were major QTLs and 2 QTLs were found to be stable across environments. 3 QTLs were mapped for the trait grain yield per plant (GYP). 10 QTL clusters were identified among which cluster no. 10 on chromosome no. 12 had a congregation of 8 QTLs together within a region of 29 cM and can be considered as a QTL hotspot. Six genes within the QTL regions were found to be differentially expressed under stress condition. The genes were Calcium-transporting ATPase 9, Phosphoinositide binding protein, Histone demethylase JARID1C, Nuclear-pore anchor and OsWAK3 - OsWAK receptor-like cytoplasmic kinase and Cytochrome P450. Overall results from the present study sets a good achievement within the science of molecular breeding and can give a strong scientific background for the future researchers, the outcomes of which can help them to develop drought tolerant rice varieties.