SUCHITRA BALMIKI*, SEUJI BORA NEOG AND NAGENDRA SARMA BARUA
Department of Plant Breeding and Genetics
AICRP on Forage Crops
Department of Plant Breeding and Genetics
Assam Agricultural University, Jorhat, Assam-785013
*(e-mail : suchitrabalmiki66@gmail.com)
(Received : 12 September 2021; Accepted : 28 September 2021)
SUMMARY
The current experiment was conducted in the Instructional-Cum-Research Farm, Assam Agricultural University, Jorhat, Assam during Rabi 2018 to study the genetic variability and yield performance of fourteen rice bean genotypes grown in Randomized Block Design with two replications. The observations were recorded for twenty-six quantitative characters viz., plant height, primary branches per plant, secondary branches per plant, stem diameter, stem length, seed yield per plot, leaf length, leaf breadth, leaf area, leaf-stem ratio, 100 seed weight, pod length, pod breadth, seed length, seed breadth, seeds per pod, specific gravity of seeds, days to 50% flowering, days to maturity, green forage yield per plant, dry matter yield per plant, productive racemes per plant, pods per raceme, crude protein %, crude fibre % and ash %. The analysis of variance revealed that there was significant difference among all the genotypes for all the characters. The estimates of genotypic coefficient of variation and phenotypic coefficient of variation were observed to be high for stem length, leaf-stem ratio, productive racemes per plant and seed yield per plant. High heritability coupled with high genetic advance as per cent of mean was observed for stem length, leaf area, 100 seed weight, pod length, seed breadth, leaf-stem ratio, productive racemes per plant and seed yield per plant indicating the preponderant influence of additive gene effects.
Key words:Rice bean, genetic variability, genotypic coefficient of variation, phenotypic coefficient of variation, heritability