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Development Heterotic Groups Based Combining Ability Inter specific Hybrids Performance Yield Fiber Quality Traits
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significant and other were negative significant
differences, shown the highest values by the testers
DH 49-1 (0.34) and DH 18-31 (0.25). Among the lines,
three showed significant differences of
gca
effects and
the line DB 534 had significant positive of
gca
effect
(0.16).
1.1.8 Seed index (g)
Nine tester parents exhibited significant
gca
effects,
four testers had significant
gca
in positive direction
and highest was recorded in DH 13-7 (1.18). Among
the lines, DB 534 showed positive significant
gca
effect (0.27).
1.1.9 Ginning outturn (%)
Six hirsutum tester parents displayed significant
gca
effects, of which three testers exhibited significant
positive
gca
effects and highest value was recorded by
DH 98-27 (2.87). Among the barbadense lines, DB
532 (-0.61) exhibited significant negative
gca
effect.
1.1.10 Lint index (g)
Seven hirsutum testers showed significant
gca
effects,
of which four testers had positive
gca
effects and the
tester DH 13-7 (0.84) recorded highest value of
gca
effect. There are no significant differences among all
barbadense lines and DB 534 (0.14) exhibited highest
value of
gca
effect.
1.2 Comparison of hybrids based on heterotic box
with checks and other crosses
The mean performance of 49 best HB interspecific
hybrids and three commercial checks (
Bt
check MRC
6918 and non
Bt
checks RAHB 87 and DCH 32) are
briefly presented in Table 4.
1.2.1 Seed cotton yield (kg ha
-1
)
Among 52 hybrids, seed cotton yield values ranged
from 2277.81 [ZCH 8 x DB 533] to 1232.69 [DH
11-20 x DB 534]. Fourteen hybrids had high
performance with respect to seed cotton yield as
compared to RAHB 87 (2087.13), two hybrids
exhibited higher seed cotton yield than MRC 6918
(2070.00) and twenty three hybrids had higher values
of seed cotton yield than DCH 32 (1767.23).
1.2.2 Plant height (cm)
Plant height values ranged from 301.00 [DH 102-23 x
DB 534] to 178.00 [DH 18-31 x DB 532] and the
results showed that ten hybrids recorded higher plant
height than DCH 32 (256.67), thirty hybrids recorded
high performance with respect to plant height as
compared to RAHB 87 (210.67) and seven hybrids
had higher plant height than MRC 6918 (199.00).
1.2.3 Number of monopodia per plant
Among 52 hybrids evaluated, number of monopodia
per plant values ranged from 4.00 [DH 43-44 x DB
532] to 0.67 [DH 18-31 x DB 533] and twenty six
hybrids recorded higher number of monopodia per
plant than RAHB 87 (2.00), eight hybrids recorded
high performance with respect to number of
monopodia per plant as compared to DCH 32 (1.33)
and two hybrids DH 57-95 x DB 533 and DH 10-2 x
DB 531 exhibited equal performance of number of
monopodia per plant to the
Bt
check MRC 6918
(1.00).
1.2.4 Number of sympodia per plant
Among all the hybrids evaluated, number of sympodia
per plant values ranged from 39.33 [DH 40-29 x DB
532] to 23.00 [DH 18-31 x DB 532] and the results
showed that three hybrids recorded high performance
with respect to number of sympodia per plant as
compared to DCH 32 (34.67), twelve hybrids recorded
higher number of sympodia per plant than RAHB 87
(31.33) and seventeen hybrids had higher number of
sympodia per plant than MRC 6918 (28.67).
1.2.5 Number of bolls per plant
Number of bolls per plant values ranged from 47.33
[DH 22-76 x DB 534] to 21.00 [DH 102-23 x DB
534], seventeen hybrids exhibited high performance
with respect to number of bolls per plant as compared
to RAHB 87 (33.00), one hybrid DH 18-31 x DB 534
recorded equal value of performance to the
Bt
check
MRC 6918 (32.67) and ten hybrids had higher number
of bolls per plant than DCH 32 (30.67).
1.2.6 Mean boll weight (g)
Mean boll weight values of 52 best HB hybrids ranged
from 5.20 [DH 39-84 x DB 531, DH 11-8 x DB 532,
DH 53-2 x DB 534, DH 84-7 x DB 533 and DH 8-7 x
DB 532] to 3.50 [DH 11-8 x DB 531, 177-24 x DB
531, DH 11-8 x DB 534 and DH 91-1 x DB 531] and
Cotton Genomics and Genetics