The Journal of Research ANGRAU

Research Notes
J.Res. ANGRAU 41(1) 132-134, 2013
CORRELATION AND PATH ANALYSIS FOR YIELD AND ITS
COMPONENTS IN RICE (Oryza Sativa L.)
C.MANIKYA MINNIE, T.DAYAKAR REDDY and CH.SURENDER RAJU
Department of Genetics and Plant Breeding, College of Agriculture,
Acharya N.G.Ranga Agricultural University, Rajendranagar, Hyderabad-500030
Date of Receipt : 07.02.2012 Date of Acceptance : 07.01.2013
Path analysis measures the direct and
indirect effects of independent variables on dependent
variables. Knowledge of cause and effect relationship
makes selection more effective. In the present
investigation an attempt was made to find out the
effects of component traits on grain yield of rice.
The experimental material comprising of 81
genotypes (including 3 checks) obtained from
different sources was cultivated during kharif, 2008
at Rice section farm, Agriculture Research Institute,
Rajendranagar, Hyderabad. All the genotypes were
sown separately in the nursery on raised beds. Thirty
days old seedlings of each genotype were
transplanted in five rows of 6 m length by adopting a
spacing of 15 cm between plants and 15cm between
rows in a Randomized Block Design replicated twice.
Recommended agronomic practices and plant
protection measures for raising a healthy crop were
taken up during experiment. Five plants of each
genotype in each replication selected randomly from
central rows were used to record data. The mean
values were considered for statistical analysis.
Genotypic correlations in general were high
as compared to their phenotypic correlations
indicating strong inherent association between the
characters which might be due to masking or
modifying effects of environment.
The correlation analysis indicated that grain
yield was significantly associated with number of
productive tillers per plant, plant height, number of
grains per panicle and panicle length. Similar kind of
association was reported by Satish Chandra et al.
(2009) for number of productive tillers per plant,
number of grains per panicle and panicle length and
Madhavi Latha (2002) for plant height.
The data indicated that days to 50 percent
flowering and 1000 gram weight had no association
with grain yield.
The characters that showed positive and
significant association with grain yield could be
considered as criteria for selection for yield
improvement as these were mutually and directly
associated with grain yield.
Days to 50 per cent flowering had significant
positive association with number of grains per
panicle. Similar result was reported by Madhavi Latha
(2002).
Plant height registered positive and
significant association with number of productive
tillers per plant, panicle length, 1000 grain weight and
number of grains per panicle, indicating that the
increase in panicle length and number of grains per
panicle and 1000 grain weight can be possible with
an increase in plant height. Similar results were also
obtained by Janardhan et al. (2001) for number of
productive tillers per plant, panicle length and number
of grains per panicle and Yogameenakshi et al. (2004)
for 1000 grain weight.
Number of productive tillers per plant was
positively and significantly correlated with number of
grains per panicle and panicle length. These results
are in consonance with the earlier findings of
Janardhanam et al. (2001). It showed positive
correlation with 1000 grain weight.
Panicle length had high significant positive
association with 1000 grain weight and number of
grains per panicle. Similar results were also obtained
by Yogameenakshi et al. (2004).
email: minnie_chitturi@yahoo.co.in
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