Agriculture Reference
In-Depth Information
B. Covariance
components
among
the
different characters of mulberry
Covariance
component
Fresh weight
of leaf (
Yield/plant (
Y
)
Shoot length (
X
1 )
X
2 )
Leaf area (
X
3 )
2108.02
Shoot length ( X
1 )
Genotypic
σ g ij
2115.78
Phenotypic
σ p ij
1346.68
Fresh weight
of leaf (
1681.85
σ g ij
Genotypic
X
2 )
1344.68
1667.36
Phenotypic
σ p ij
609.77
Leaf area ( X
3 )
1069.49
1451.58
Genotypic
σ g ij
608.64
1070.89
1452.16
Phenotypic
σ p ij
984.42
Leaf
weight/m 2 (
1405.20
2757.10
927.09
σ g ij
Genotypic
X
4 )
982.31
1392.70
2757.84
928.16
Phenotypic
σ p ij
C. Average performance with respect
to
different characters
in ten genotypes of
mulberry
Leaf weight/m 2
Genotype
Leaf yield/plant
Total shoot length
Fresh wt of 100 leaves
Unit leaf area
1
158.67
347.07
94.37
56.80
149.27
2
192.43
638.30
190.14
106.58
162.90
3
195.62
457.95
86.42
61.44
131.46
4
211.23
364.48
226.96
106.39
361.28
5
202.29
557.77
170.02
96.44
161.12
6
205.42
432.66
216.51
109.41
175.59
7
217.63
695.60
159.28
92.73
158.73
8
170.28
258.89
161.25
93.94
154.63
9
117.58
382.73
49.12
35.36
116.15
10
176.00
432.82
108.15
72.46
136.57
Mean
184.71
456.83
146.22
83.15
170.77
Phenotypic Coefficient of Variation (PCV)
Phenotypic coefficient of variation of any
character
Genotypic Coefficient of Variation (GCV)
Genotypic coefficient of variation is given by
GCV
(a)
(b)
¼ σ p
¼ σ g
2
g
is given by PCV
x
100,
x
100, where
σ
is the genotypic
2
p
where
σ
is the estimated phenotypic vari-
variance and
x
is the arithmetic mean of the
character (
X
) under consideration. Thus, the
ance and
x
is the arithmetic mean of the
GCV for
leaf
yield
per
plant
is
character (
X
) under consideration. Thus, the
903 : 95
p
184 : 71
¼ σ g
PCV for
leaf
yield
per
plant
is
GCV
28;
similarly the genotypic coefficient of varia-
tion for other characters also worked out.
x
100
¼
100
¼
16
:
916 : 09
p
184
¼ σ p
PCV
39;
similarly the phenotypic coefficient of varia-
tion for other characters also worked out
and is presented in the table of genetic
parameters.
x
100
¼
71
100
¼
16
:
:
(c)
Broad Sense Heritability
Heritability in broad sense is given as
h
2
g
σ
2
¼
, where the estimate of genotypic var-
σ
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