Genetic Variability and Association Analysis in Different Rice Genotypes in Mid-Hill of Western Nepal

S Gyawali*, A Poudel and S Poudel

Department of Agronomy and Plant Breeding, Institute of Agriculture and Animal Science, Tribhuwan University, Lamjung Campus, Lamjung, Nepal

*Corresponding Author: S Gyawali, Department of Agronomy and Plant Breeding, Institute of Agriculture and Animal Science, Tribhuwan University, Lamjung Campus, Lamjung, Nepal.

Received: July 31, 2018; Published: August 16, 2018

Citation: S Gyawali., et al. ““Genetic Variability and Association Analysis in Different Rice Genotypes in Mid-Hill of Western Nepal". Acta Scientific Agriculture 2.9 (2018).

Abstract

  An experiment has been carried out in Sundar bazar Municipality of Lamjung district using 7 rice genotypes with a local check variety (Biji) to get information on genetic variability of different traits and interrelationship of yield and yield attributing characters. The experiment conducted in a Randomized Complete Block Design with 3 replications. Among the studied genotypes, days to booting, days to heading, days to anthesis, plant height, effective tillers per m² , thousand grain weight, straw yield, harvest index was found significantly varied. The genotype NR11130-B-B-B-8-3 was the earliest in flowering whereas, Local-Check Biji was late flowering type. The highest plant height was recorded in the variety NR11289-B-16-3 but the variety LPNBR-1628 was the shortest in plant height. LPNBR 1628 produced the highest 1000 grains weight on the other hand the variety Khumal-4, produced the lowest 1000 grains weight. The highest yield per m² was produced by the LPNBR 1628, whereas the lowest yield per m² was produced by the variety NR11130-B-B-B-8-3. Genotypic correlation coefficients were lower than the corresponding phenotypic correlation coefficients of all the traits. The highest GCV (30.675) was found in case of Grain yield. Heritability was quite high for all the characters except panicle length (0.02), flag leaf area (0.14). The highest heritability was found against the character of anthesis days (0.97), Genetic advance was found highest for effective tillers per m² (33.80). Grain yield per plant showed significant and positive correlation with spikelet fertility indicating the importance of filled grain per panicle for yield improvement in this population.

Keywords: Correlation; GCV; Heritability; PCV; Rice

Copyright: © 2018 S Gyawali., et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.