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.
