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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: Dutta, Lonishree × End date: 2019 × Start date: 2019 × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    EVALUATION OF RICE VARIETIES FOR YIELD AND ANCILLARY TRAITS UNDER ORGANIC CULTIVATION
    (AAU, Jorhat, 2019-07) Dutta, Lonishree; Sharma, Kishore Kumar
    An experiment was laid under both organic and inorganic conditions with ten rice varieties grown under organic situation for more than ten years. The rice varieties collected from farmer’s field were grown with an objective to observe traits suitable for varietal development under organic situation. The analysis of variance for nine quantitative characters, nine grain characters and eight biochemical characters indicated existence of variation of the characters among the varieties. The pooled analysis indicated high G x E interaction for most of the characters under investigation indicating necessity for selection of the characters separately for both organic and inorganic situations. In pooled analysis of variance, it was also found high G x E interaction for Fe (Iron) and Zn (Zinc), which indicated that for these two important micro-nutrients selection, will be effective under organic situation. The correlation coefficient for quantitative character like grain yield is positively correlated to ear bearing tiller (EBT) and Harvest Index (HI) for both organic and inorganic condition, whereas grain yield is negatively correlated to plant height for both the growing situation. It is also observed that Flag Leaf Area (FLA) is positively correlated to grain yield for inorganic condition only. Grain character like Head Rice Recovery (HRR), an important character with respect to marketability of organic produce in the international market and consumer preference, is found to be negatively correlated to Hulling Percentage (HP). In Path Analysis for both organic and inorganic cultivation, it is observed that the highest direct effect is contributed by EBT. High GCV (Genotypic coefficient of variation) and heritability were observed in most of the characters which indicated preponderance of genes in expression of characters. In most of the characters like plant height, EBT etc., GA (Genetic Advance) and Heritability were found to be high indicating additive gene action and effective action of simple selection procedure in improvement of characters under organic situation. Hence, it is concluded from the experiment that variability exist for characters in the indigenous varieties for organic situation and breeding program has to be taken separately for organic situation through selection.