Cotton Genomics and Genetics 2015, Vol.6, No.4, 1-7
2
textile industrialists give preference to fibre related
traits i.e., fibre strength, fibre length and fibre fineness.
Iqbal et al
.
(2006) emphasized that the seed cotton
yield is positively correlated with number of boll
weight, number of monopodial branches and number
of bolls, whereas, negatively correlated with GOT.
Rasheed et al
.
(2009) concluded that yield is positively
correlated with number of bolls, boll weight and GOT,
whereas, negatively correlated with fibre strength and
plant height. There are many factors that effect on
seed cotton yield such as number of bolls, plant height,
number of fruiting branches, ginning out turn
percentage, boll weight and seed index (Salahuddin et
al.,
2010). It also reflects the response of one trait with
its counterpart, although, correlation of agronomic
characters will definitely help to enhance yield in
cotton and characterization in order to screen the
promising lines. Aim of this study is to find out the
extant of association, heritability, direct and indirect
effects of polygenic traits on genotypes.
Results and Discussion
The means of ten polygenic traits, correlation, path
coefficients and heritability is illustrated in Table 1~
Table 4, respectively. The data is subjected to the
analysis of variance (ANOVA) prescribed by Steel and
Torrie
1987. All the genotypes/crosses have significant
differences among them. The mean values are shown
in Table I along with their units in which they measured.
Correlation Analysis
Seed cotton yield had positive correlation with 100
seed weight, plant height, number of sympodial
branches, fibre length and fibre strength. Whereas,
seed cotton yield showed strong negative correlation
with number of monopodial branches, ginning-out-turn
and fibre fineness. Iqbal et al. (2006) proved the same
results. The results of Karademir et al. (2010) were
contrary to the present research. Joshi et al. (2006)
found negative correlation between seed cotton yield
and GOT whereas positive correlation with plant height.
Number of monopodial branches illustrated strongly
negative association with weight of 100 seeds, plant
height, fibre length and seed cotton yield. Whereas,
monopodial branches were moderate negative associated
with fibre strength and number of sympodial branches.
Monopodial branches had positive correlation with GOT
and fibre fineness. Ginning- out-turn and monopodial
branches had significant negative association with
yield per plant. Study conducted by Tariq et al
.
(1992)
reported the same results. Ahuja et al
.
(2006) reported
negative correlation of number of monopodial branches
to plant height, fibre strength and fibre length. Kazerani
et al
.
(2012) and Hatamee and Latifi (2004) reported
negative association of plant height and number of
monopodial branches.
Ginning-out-turn percentage had strong negative
association with seed cotton yield, weigh of 100 seeds,
plant height, fibre length and fibre strength. Whereas,
GOT had positive association with monopodial branches,
sympodial branches and fibre fineness. So in case of
selection process we have to be very careful to focus
toward both fibre yield and fibre fineness.
Weight of 100 seeds had positive correlation with seed
cotton yield and plant height whereas strongly
negative association with monopodial branches, GOT,
number of bolls and fibre fineness. Weight of 100 seed
showed moderately negative association with sympodial
branches and non-significance association with fibre
strength and fibre length. Karademir et al. (2009)
found negative association of weight of 100 seeds and
GOT, and further enunciated that 100 seed weight had
no any effect on yield and fibre traits.
Plant height is the one of the most promising traits
which contributes in yield. Plant height had strong
positive correlation with seed cotton yield, weight of
100 seeds, sympodial branches and fibre length,
whereas, negative correlation with monopodial branches,
GOT, fiber fineness and fibre strength. From these
results, we can conclude that if we want good fibre
quality than we must go for short heighted varieties.
Taohua & Haipeng (2006) and Khan et al. (2009)
reported that plant height positively correlated with
yield and number of bolls. Murthy (1999) reported the
same results and noted that plant height contributed
70% in seed cotton yield. Camlho et al
.
(1994)
reported negative association of plant height and fibre
strength. Number of bolls proved to have strong
positive association with seed cotton yield, fibre
strength and sympodial branches. Karademir et al.
(2009) authenticated that number of bolls had positive
association with sympodial branches and weight of
seed cotton. Bibi et al
.
(2011) reported negative
association of number of bolls and sympodail branches.
