Variability and Correlation Between Yield, Yield Components and Morphological Characters in some Rice (Oryza sativa L.) Genotypes

Abstract

The study was conducted at the Sudan University of Science and Technology; College of Agricultural Studies, Shambat farm during the period from August/2009 to February 2010. The aim is to study variability and correlation between yield, yield components and morphological characters in some rice genotypes. The experiment was laid out in a randomized complete block design (RCBD) with three replications. Fifteen characters were measured including yield, yield components and morphological characters. Phenotypic ( 2 δ ph ) and δ 2 genotypic ( g ) variances, phenotypic (PCV) % and genotypic (GCV) %, coefficients of variation were estimated. Phenotypic and genotypic correlation between different characters was determined. The results showed that there were highly significant differences(p≤0.01) for yield kg / ha, plant height (cm), number of tillers per plant, weight of 100 grain (g), number of grains per panicle, grain length (mm), number of leaves per panicle, number of filled grains per panicle, days to 50% flowering, harvest index (%) and days to 50% maturity. Also the results showed significant differences (p≥0.05) for panicle length (cm), and non significant differences for percentage of unfilled grains per panicle (%). The highest values of phenotypic and genotypic variance were recorded by yield kg /ha. Also grain yield was attained the highest values of phenotypic and genotypic coefficients of variation. VIII Positive phenotypic correlation was observed between grain yield and number of filled grains per panicle, harvest index, panicle length, number of leaves per plant, number of grains per panicle, days to 50% maturity and stem diameter. Also positive genotypic correlation was detected between grain yield and number of filled grains per panicle, harvest index, panicle length, leaf area, number of leaves per plant, number of grains per panicle, days to 50% flowering and days to 50% maturity.