The Journal of Research ANGRAU

CORRELATION AND PATH ANALYSIS FOR YIELD AND ITS COMPONENTS
Path coefficient analysis was used to
compute direct and indirect effects of six characters
on grain yield. The characters number of productive
tillers per plant, panicle length and number of grains
per panicle with positive direct effects on yield could
be considered as major yield contributing characters
in rice. These findings were in agreement with the
reports made by Karad and Pol (2008) for number of
productive tillers per plant and panicle length and
Satish Chandra et al. (2009) for number of grains per
panicle.
On the contrary negative direct effects were
existed by days to 50 per cent flowering, plant height
and 1000 grain weight. Gupta et al. (1998) also
recorded similar kind of negative direct effect of these
traits on yield.
The characters, panicle length, number of
grains per panicle showed positive indirect effect
through number of productive tillers per plant on grain
yield. Similar results were obtained by Gupta et al.
(1998). The panicle length exhibited positive indirect
effect through number of productive tillers per plant
and number of grains per panicle. Number of
productive tillers per plant, 1000 grain weight and
panicle length showed positive indirect effect on grain
yield through number of grains per panicle. These
results were in accordance with the results obtained
by Madhavilatha (2002).
The characters days to 50 per cent flowering,
plant height and 1000 grain weight were not only
having negative direct effect on grain yield but also
had negative association with the yield contributing
characters. This was in consonance with the results
of Gupta et al. (1998).
Path analysis revealed the importance of the
characters, number of productive tillers per plant,
panicle length and number of grains per panicle in
influencing the grain yield. Hence, selection should
be practiced for these characters in order to isolate
superior plant types for improvement of grain yield.
Table 1.Estimation of correlation coefficients between yield and yield attributing characters
Character
Days to
50 %
flowering
Plant
Height
(cm)
Number of
productive
tillers per
plant
Panicle
Length
(cm)
Number of
grains per
panicle
1000 Grain
Weight (g)
Grain
Yield/
Plant (g)
Days to 50% P 1.0000 0.0622 0.0434 0.0992 0.2648** -0.2933** -0.0001
Flowering G 1.0000 0.0727 0.0109 0.0987 0.2590** -0.3024** -0.0181
Plant Height P 1.0000 0.3113** 0.2865** 0.1525 0.1620* 0.3197**
(cm) G 1.0000 0.5046** 0.2958 ** 0.1606* 0.1845* 0.3964**
Number of P 1.0000 0.1010 0.2048** -0.0175 0.8501**
productive
tillers/plant
G 1.0000 0.1508 0.2512** 0.0233 1.0014**
Panicle P 1.0000 0.2383** 0.3725** 0.1047
Length (cm) G 1.0000 0.2546** 0.4021** 0.1599*
Number of P 1.0000 -0.3270** 0.2483**
grains/panicle G 1.0000 -0.3425** 0.2711**
1000 Grain
Weight
(g)plant
P 1.0000 -0.0329
G 1.0000 -0.0157
* Significant at 5% level ** Significant at 1% level