Author(s):

Khirud Panging, Debojit Sarma, Rumjum Goswami Phukon and Shantanu Das

Abstract: The present investigation was conducted to evaluate 12 indigenous Joha rice genotypes for different yield characters under inorganic and organic cultures. The materials were characterized during sali season of 2015-16 at the Instruction-cum-Research (ICR), Assam Agricultural University (AAU), Jorhat using Randomized Block Design (RBD) with three replications. Analysis of variance revealed the existence of significant differences among the genotypes for all the traits under both inorganic and organic cultures. Among all the characters, panicle weight, grains/panicle, 1000-grain weight, grain yield/plant, straw yield/plant and harvest index exhibited moderate to high estimates of the genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV) were recorded under organic and inorganic culture. Also, high estimates of heritability were recorded for days to first flowering, days to 50% flowering, plant height, grains/panicle, 1000-grain weight, and harvest index. High heritability coupled with high genetic advance was observed only for 1000-grain weight under both the cultures. The correlation analysis revealed that under both the condition the grain yield/plant had a significant positive association with biological yield and harvest index at both genotypic and phenotypic level respectively. Thus, all these information could be effectively used to formulate a breeding programme for improvement of their adaptation under organic farming.

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