Thumbnail Image

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.

Browse

20191
Reset filters
Subject: Plant Breeding × Author: Shivam, Kasturi × End date: 2019 × Start date: 2019 × Thesis Type: M.Sc ×
Reset filters

Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    ThesisItemOpen Access
    STUDY ON EFFECT OF MUTATION ON RANJIT SUB-1 FOR YIELD AND YIELD ATTRIBUTING CHARACTERS
    (AAU, Jorhat, 2019-07) Shivam, Kasturi; Chetia, Sanjay Kumar
    Rice (Oryza sativa) has been grown in Assam from time immemorial and it is the single most important crop in the state and its adjoining areas, because of its enormous variability, adaptability and preference in the state. Sali or winter rice is the dominant crop of the state covering 18.7 lakh hectares and contributing 73% of the total rice production. Out of 18.7 lakh hectares of Sali areas 12.7 lakh hectares come under flood free shallow lowland. Shallow lowland is as good as irrigated areas and high yielding varieties like Ranjit, Bahadur, Mahsuri, Gitesh etc. are grown. Amongst the HYVs, Ranjit was the most popular variety but farmers finding it difficult to go for Rabi crops after the harvesting of Ranjit due to its longer duration. One of the reasons for the low farmer‟s income is lower cropping intensity. Farmers of Assam prefer to grow longer duration rice variety during kharif season for which it is difficult to increase cropping intensity. Therefore, it is essential to develop the shorter duration version of popular rice variety Ranjit. The seed of Ranjit Sub-1 was treated with three doses 170Gy, 210Gy and 240Gy of gamma ray during May, 2017. The M1 generation of each doses along with the checks (Luit, Shraboni and Ranjit Sub-1) grown during Sali, 2017. The experiment was conducted by Augmented Design. The data of Days to 50% flowering, Plant height, EBT, Fertile spikelet etc. was recorded. Sterility percentage increases with increases in irradiation. Highest sterility percentage was recorded in 240Gy Gamma ray. Further from the recorded data of 500 plants of each dose, it was found there is significant effect of mutation in all the three doses for all the characters except in tiller numbers. Three desirable early mutants were selected during Sali, 2017. The M2 progeny was raised during Sali, 2018. The segregation for Days to 50% flowering and Maturity duration was studied and it was found to fit well in 9:3:3:1 ratio. The effect of mutagens on Sub-1 QTL was also studied. We have confirmed the presence of Sub-1 QTL in treated seeds with the help of SSR marker (Sub1BC2). Ranjit Sub-1 and Ranjit were considered as positive and negative check respectively. During gel analysis we have observed both positive and negative type among progenies and hence we concluded that there was effect of Sub-1 QTL.