Author(s):

Sujan Acharjee, Dr. Nihar Ranjan Chakraborty and Dr. Sankar Prashad Das

Abstract: In the present study, 60 (Sixty) nos. of rice land races were collected from the upland province of Tripura through an extensive exploration programme. Subsequently experiment was carried out in ICAR Research Complex for North Eastern Hilly Region, Tripura Centre, Lembucherra, West Tripura to determine the agro-morphic characterisation of the collected landraces and also to assess their variability based on 14 (fourteen) qualitative and 12 (twelve) quantitative descriptors. The experiment was conducted in two subsequent Kharif seasons during the year 2015 and 2016 using Randomised Complete Block Design (RCBD) with two replications. Qualitative and quantitative characters under the study showed considerable polymorphism among the landraces. Environmental influence was meager on expression of characters as evidenced by narrow gap between genotypic coefficient of variability (GCV) and phenotypic coefficient of variability (PCV) for most of the quantitative traits. High magnitude of GCV, PCV as well as heritability coupled with moderate to high genetic advance were found for grain yield per plant (gm.), nos. of filled grain per panicle, nos. of spikelet per panicle and 100 seed weight (gm.), which implies effectiveness of those traits for selection of superior genotype. Cluster analysis based on Mahalonobis D² values grouped the land races into 6 nos. of groups. Significant magnitude of intracluster and intercluster distances within and between the groups ascertained ample scope for utilisation of the landraces in recombinant and heterosis breeding programme. Landraces namely Garo Malati, Chikanswari Kabar, Turkey, Galong proved themselves as most promising parents for future breeding programme.

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