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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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Subject: Plant Breeding × Author: Das, Manikankana × End date: 2019 × Start date: 2017 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    GENETIC DIVERSITY AND CHARACTER ASSOCIATION IN BENGAL ASSAM ASSOCIATION MAPPING PANEL (BAAP) OF RICE
    (2018) Das, Manikankana; Sarma, R. N.
    The present study was conducted with 265 rice genotypes collected from different region of Assam (India), Bangladesh and other countries with an objective to estimate nature and extent of genetic variability in BAAP population for some agronomically important traits and to study the interrelationship among yield attributing traits. Morphological data recorded on 14 traits were analysed for analysis of variance, mean performance, phenotypic and genotypic coefficient of variation, heritability, genetic advance, genetic divergence based on Mahalanobis’s (D2) tocher’s method and Euclidean2 ward’s method statistic, correlation analysis, path analysis. Analysis of variance revealed significant variation among genotypes for all of the characters. The maximum mean performance for yield and yield attributing characters was exhibited by BRRI dhan 45::G1, BRRI dhan 50::G1, Pura Nukna, Bowalia, Tainung 67 and PachodI 427. The GCV, PCV, heritability and genetic advance estimates were observed to be high for yield per plant followed by tiller number per plant and 100 seed weight. Based on D2 and Euclidean2 values, the genotypes were grouped into 17 clusters. The clustering pattern suggested that genotypes of the different origin were distributed into different clusters, indicating the absence of parallelism between clustering and geographic distributions. In Tocher’s method the maximum intra-cluster distance was observed in cluster 14 and the maximum inter-cluster distances was between cluster 15 and cluster eight. In Ward’s method the maximum intra cluster distance was observed in cluster 17 and the maximum inter cluster distance was between cluster 17 and cluster two. In Tocher’s method the highest cluster mean value for the plant height in cluster 15. In Ward’s method the plant height was maximum in cluster 17. The tiller number per plant recorded significally positive correletion with yield per plant and negative correlation with flag leaf breadth, grain breadth, dehusked grain breadth, cooked grain breadth at phenotypic level. In path coefficient the dehusked grain length had highest positive direct effects and also highest positive indirect effects on grain yield. So these traits may be used as selection criteria for the improvement of seed yield of rice. The contribution of plant height was highest towards genetic divergence followed by yield per plant.