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Science and Education in Karakalpakstan. 2023 №2/1 ISSN 2181-9203



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Science and Education in Karakalpakstan. 2023 №2/1 ISSN 2181-9203 

Table 
Cotton weight per boll in parental plants and its variation in F
2
 generations, 
and average weight analysis 
№ 
Varieties and hybrid 
combinations 
Number 
of plants 
Grades, g (in percent) 
M±m 
σ 
limit 
V,

h
2
3.5
-4.0
4.1
-4.5
4.6
-5.0
5.1
-5.5
5.6
-6.0
6.,
-6.5
6.6
-7.0
7.1
-7.5
7.6
-8.0
8.1
-8.5

AN-Boyovut-2 
30 


23.

36.

30.0 
10.





5.5±0.1

0.53 
4.2-6.2 
9.5


F
2
AN-Boyovut-2xS-6524 
120 

7.5 
25.

32.

17.5 
7.5 2.5 
7.5 


5.4±0.1

0.75 
4.5-7.3 
13.

0.43 

F
2
S-6524xAN-Boyovut-2 
120 

10.

15.

12.

27.5 
15.

15.



5.0 
5.8±0.1

0.95 
4.3-8.1 
16.

0.67 

S-6524 
30 

16.

40.

26.

16.7 





5.1±0.0

0.47 
4.2-6.0 
9.2


Farmer 
30 


16.

46.

20.0 
16.





5.5±0.0

0.45 
4.8-6.4 
8.2


F
2
Namangan-
77xDehkanbob 
120 
2.5 
10.

30.

27.

20.0 
10.





5.3±0.0

0.58 
4.0-6.5 
11.

0.08 

F
2
DehkanbobxNamangan-
77 
120 

2.5 7.5 
17.

17.5 
27.

22.

2.5 

2.5 
6.1±0.1

0.80 
4.4-8.1 
13.

0.51 

Namangan-77 
30 

10.

26.7 23.3 
20 
20 



- 5.4±0.12 0.63 
4.3-6.5 9.71 

F
2
Namangan-77xAN-130 
120 

5.0 15.0 17.5 15.0 27.5 17.5 
2.5 

- 5.9±0.12 0.76 
4.5-7.4 12.9 
0.30 
10 
F
2
AN-130xNamangan-77 
120 



12.5 10.0 15.0 17.5 30.0 
10.0 5.0 6.8±0.13 0.83 
5.2-8.4 12.3 
0.49 
11 
AN-130 
30 



10.0 26.6 46.7 10.0 
6.7 


6.1±0.12 0.64 5.3-7.3 9.42 


Science and Education in Karakalpakstan. 2023 №2/1 ISSN 2181-9203 
10 
The coefficient of variation of the sign was equal to 11.1%, and the variability of the sign 
was shown to be moderate. A shift to the left in the variation series of plants by 2 classes was noted, 
and it was observed that the coefficient of inheritance of the trait was h
2
=0.08, which indicates that 
the plants in this combination were mainly inherited under the influence of the external 
environment. 
In the reciprocal hybrid combination, the weight of cotton in one bag is 4.4 g. from 8.1 g. up 
to 8 classes, and plant location classes 4.1-8.5 gg. settled in between. The highest percentage of 
plants is 6.1-6.5 g. class (27.5%), and the average indicator for this sign is 6.1 g. formed The 
coefficient of variation of the sign was equal to 13.1%, and the variability of the sign was shown to 
be moderate. Plant variation series 3 classes shift to the right and plant weight 7.6-8.0 g. we can see 
that it is not observed in class . The coefficient of inheritance of the character was equal to h
2
=0.51, 
which means that 51% of the character of the cotton weight in one boll was inherited by the 
genotype of the hybrid form, 49% by the influence of the external environment. 
6.1-6.5 g of AN-130 cotton variety according to this sign. the indicator class contained the 
largest percentage of plants (46.7%) and was the modal class. In the Namangan-77 x AN-130 
hybrid combination, the weight of cotton in one bag is 4.5-7.4 g. is equal to, divided into 7 classes, 
4.1-7.5 g. placed in class intervals and the average indicator is 5.9 g. formed Plants are mostly 6.1-
6.5 g. was registered in the class and took 27.5%. The coefficient of variation of the sign was equal 
to 12.9%, and it was observed that the sign of the weight of cotton per bag changed to a moderate 
extent. As the variation line of the plants shifted to the right, the coefficient of transmission of the 
trait from generation to generation was h
2
=0.30, which indicates that 30% of the cotton weight in 
one boll of the trait was inherited by the genotype of the hybrid form, and 70% by the influence of 
the external environment. 
In the reciprocal hybrid combination, the minimum and maximum indicators of plants are 
5.2-8.4 g. is equal to, in 7 classes, i.e. 5.1-8.5 g. placed in the classes between them. The largest 
percentage of studied plants is 7.1-7.5 g. 30.0%, and the average value is 6.8 g. was equal to The 
coefficient of variation of the sign was equal to 12.3%, and the variability of the sign was shown to 
be moderate. As the variation series of plants shifted to the right, the coefficient of transmission 
from generation to generation was equal to h
2
=0.49. It was observed that 49% of the studied cotton 
weight in one boll was inherited by the genotype of the hybrid form, 51% by the influence of the 
external environment. 
In F
2
plants, the trait transmission coefficient (h
2
) was low in Namangan-77 x Dehkanbob 
combination, while it was moderate in other combinations. The AN-130 x Namangan-77 hybrid 
combination showed a higher result of the trait transmission coefficient (h
2
) in reciprocal hybrid F
2
plants of G. hirsutum L. than other hybrid combinations. 

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