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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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  • ThesisItemOpen Access
    GENETIC VARIABILITY, CHARACTER ASSOCIATION AND DIVERSITY ANALYSIS FOR YIELD AND QUALITY TRAITS IN RICE CULTIVARS FROM MANIPUR AND ASSAM
    (AAU, Jorhat, 2021) Devi, Ningombam Sonia; Zaman, Shazmira
    Rice, being a staple food of India, is crucial to enhance its productivity and quality. There are region-wise variations in ethnic preferences of rice. Hence, the study of these variations for quality traits present in different cultivated groups of rice from the region will help in the value addition of the crop. The present experiment was carried out to evaluate 41 rice cultivars from Manipur and Assam to access the genetic variability, correlation, path analysis and genetic divergence for yield and quality traits. The study was conducted in a Randomized Block Design with three replications. The analysis of variance on 24 yield, yield components and quality traits showed the presence of variability in the experimental material for all the characters. A high range of GCV and PCV were observed for the total number of grains per panicle, the number of filled grains per panicle, grain yield per plant, biological yield and harvest index. High heritability coupled with high genetic advance as per cent of mean was observed for most of the characters under study indicating greater transmissibility of these characters and selection can be done effectively based on these characters. Grain yield exhibited positive and significant association with days to 50 per cent flowering, days to maturity, panicle number per plant, the total number of grains per panicle, number of filled grains per panicle, 100-grain weight, spikelet fertility, biological yield, harvest index, panicle harvest index, grain breadth, kernel length, kernel breadth, kernel length after cooking and kernel breadth after cooking. Hence, these characters can be considered to set the selection criteria for increasing grain yield. Path-coefficient analysis revealed that kernel breadth after cooking exhibited the highest positive direct effect on grain yield. Based on Mahalanobis D2 statistics, the genotypes could be grouped into 12 clusters out of which cluster IV had the maximum number of genotypes followed by cluster V. Among all the characters studied, grain length exhibited maximum contribution towards divergence. Cluster X and XII showed the maximum inter-cluster distance and the maximum intra cluster distance was exhibited by cluster XII. Hybridization among the genotypes of these two clusters is presumed to produce better heterotic combinations.