http://nopr.niscpr.res.in/handle/123456789/61734 Sat, 10 Oct 2026 15:53:19 GMT 2026-10-10T15:53:19Z https://http://nopr.niscpr.res.in:443/retrieve/188100/IJTK Cover.png http://nopr.niscpr.res.in/handle/123456789/61734 http://nopr.niscpr.res.in/handle/123456789/61768 Title: Morphological characterisation of rice accessions of semi deep water ecology Authors: Hussain, Safiqul; Behera, Partha Pratim; Choudhury, M R; Sarma, R N Abstract: The present investigation was carried out to evaluate the magnitude and nature of genetic variability of 569 rice germplasm accessions with semi deep water ecology, commonly known as asra, at the Regional Agricultural Research Station (RARS), Karimganj, Assam Agricultural University, Assam (India). These accessions were recognised as having flood tolerant characteristics. The first five principal components explained approximately 76.71% of the total variation. Principal component analysis revealed that traits such as number of panicles per hill, spikelet fertility, days to 50% flowering, number of chaffs per panicle, and plant height were the principal discriminatory quantitative traits. It is recommended that the genetic variation prevailing in the assessed asra rice germplasm accessions can be efficiently utilised for the enhancement of the genetic gain. The divergent extreme phenotypes in the accession can also be utilised to develop the mapping population for the identification of quantitative trait loci for flood tolerance. The rice accessions were grouped into three different clusters for both quantitative and qualitative traits. The hybridization among the selected germplasm of different clusters is expected to produce the maximum number of transgressive segregants. This will lead to area expansion with higher productivity of this crop in predominantly flood prone areas. Page(s): 7-16 Sat, 01 Apr 2023 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/61768 2023-04-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/61766 Title: Rice landraces of Tamil Nadu –a review Authors: Amudha, K; Geetha, S; Manimekalai, M; Ganesamurthy, K Abstract: India being a floristically diverse and genetically rich nation is endowed with huge rice germplasm collections. As per the vedic evidences, in olden days about 400 landraces of paddy had been in cultivation in Tamil Nadu which is an agrarian state of India. But due to the introduction of high yielding cultivars these landraces went out of cultivation leading to genetic erosion. However, a few hundreds of landraces are in cultivation in small pockets in Tamil Nadu. So it is our bound duty to conserve the available landraces, sort out the duplications and maintain the identity of the cultivars by the way of precise morphological, biochemical and molecular characterization for the valuable traits possessed by these landraces. According to ancient Tamil literature, some of these landraces are resistant to biotic and abiotic stresses while some others are known for their nutritional and therapeutic values in rice. Landraces of Tamil Nadu origin were extensively studied for their tolerance against abiotic stresses whereas the clinical validation of several of the landraces with nutritional and medicinal value is gaining importance in view of the growing interest of the consumers for a health conscious diet. In this context, traditional knowledge about the indigenous cultivars will help to explore the scientific basis of the nutraceutical values of the traditional cultivars by the plant breeders for sustaining food as well as the nutritional security and for overcoming the future challenges Page(s): 17-29 Sat, 01 Apr 2023 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/61766 2023-04-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/61764 Title: Ethnopedological knowledge of upland Karbi Community: A case study from Dima Hasao District of Assam, North-Eastern Himalaya, India Authors: Borah, Nepolion; Ladon, Padma; Garkoti, Satish Chandra Abstract: This paper describes the ethnopedological knowledge of indigenous upland Karbi farmers inhabiting a hilly area of Assam, India. Semi-directive interviews, focused group discussion and joint field visit methods were used for eliciting information on soil from key knowledge holders identified through chain referrals. Soil was classified into eight folk types based on fertility which were determined via its physical properties viz., colour, texture, water retention capacity and compactness. This classification helped them in land-use and crop-selection related decisions and some other uses. Plant species viz., Albizia spp., Imperata cylindrica, Lantana camara and Schima wallichii indicating soil fertility were valued for identification of most suitable jhum sites. To minimize soil erosion, indigenous techniques like inverted ‗U‘ shaped channels, maintaining standing trees and cut stumps, and placing horizontal wooden logs across shifting agricultural fields on steep slopes were employed. The laboratory analysis of physico-chemical parameters viz., bulk density, colour, texture, water holding capacity, pH, soil organic carbon and total nitrogen support the ethnopedological knowledge of the farmers. Study may help in preservation and protection of local knowledge on soil which is eroding fast under the influence of modernity. Page(s): 30-39 Sat, 01 Apr 2023 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/61764 2023-04-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/61763 Title: Indigenous technical knowledge of Assam for pests management – Exploit potential in organic agriculture Authors: Borkakati, R N; Barman, Sinki; Saikia, D K Abstract: One neighborhood investigation was conducted amongst 500 farmers of Nagaon, Golaghat, Jorhat and Dibrugarh districts of Central Brahmaputra valley Zone and Upper Brahmaputra valley Zone of Assam. Only 21.8% of farmers completely practiced the indigenous technology knowhow (ITK) for pest management, though 48.4% were aware about ITKs, whereas 41.8% famers apply synthetic chemical driven approaches. A total of 30 different types of ITKs had been collected which weresorted out crop wise and placed in different groups based on their use i.e. rice (20), pulses (1), tuber crops (3), vegetables (2) and fruits (4). It is speculated that a comprehensive study on different ITKs of Assam and their appropriate validation could be the valuable components for organic farming technology. Page(s): 40-49 Sat, 01 Apr 2023 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/61763 2023-04-01T00:00:00Z