20
Volume 04 Issue 03-2022
The American Journal of Agriculture and Biomedical Engineering
(ISSN
–
2689-1018)
VOLUME
04
I
SSUE
03
Pages:
20-24
SJIF
I
MPACT
FACTOR
(2020:
5.
34
)
(2021:
5.
554
)
(2022:
6.
291
)
OCLC
–
1121105746
METADATA
IF
–
7.125
Publisher:
The USA Journals
ABSTRACT
The wide range of variation of agronomic valuable traits of cotton makes it possible to form families that differ in the
type of plant branching and the complex of agronomic valuable traits. The experiment studied the variability of
agronomic valuable traits in families with the limiting and non-limiting type of branching having the same origin. A
slight change in the indicators of the main agronomic valuable traits, depending on the growing conditions,
characterizes the high adaptive ability of this L-33 line. The most significant influence of the correlation coefficients
was observed based on the raw cotton weight of one boll, the fiber output and the weight of 1000 seeds.
Research Article
COMPARATIVE ASSESSMENT OF AGRONOMIC VALUABLE TRAITS OF
FAMILIES OF LINE L-33 DEPENDING ON THE TYPE OF BRANCHING
AND GROWING CONDITIONS
Submission Date:
February 28, 2022,
Accepted Date:
March 19, 2022,
Published Date:
March 31, 2022 |
Crossref doi:
https://doi.org/10.37547/tajabe/Volume04Issue03-03
Usmanov S.A.
Senior Researcher, Сandidate Of Agricultural Sciences, Research Institute Of Seed Production And
Agrotechnology Of Cotton Breeding, Tashkent, Uzbekistan
Khudarganov K.O.
Doctor Of Agricultural Sciences, Tashkent State Agrarian University, Tashkent, Uzbekistan
Abdullayeva M. M.
Master Degree, Researcher, Plant Genetic Resources Research Institute, Tashkent, Uzbekistan
Raupov S. A.
Master Degree, Tashkent State Agrarian University, Tashkent, Uzbekistan
Mirzayev A. A.
Master Degree, Tashkent State Agrarian University, Tashkent, Uzbekistan
Journal
Website:
https://theamericanjou
rnals.com/index.php/ta
jabe
Copyright:
Original
content from this work
may be used under the
terms of the creative
commons
attributes
4.0 licence.
21
Volume 04 Issue 03-2022
The American Journal of Agriculture and Biomedical Engineering
(ISSN
–
2689-1018)
VOLUME
04
I
SSUE
03
Pages:
20-24
SJIF
I
MPACT
FACTOR
(2020:
5.
34
)
(2021:
5.
554
)
(2022:
6.
291
)
OCLC
–
1121105746
METADATA
IF
–
7.125
Publisher:
The USA Journals
KEYWORDS
Uzbekistan, cotton, lines, a raw cotton weight of one boll, fiber output, fiber length, growing conditions.
INTRODUCTION
Cotton is a valuable agricultural crop, and the
introduction of the most productive varieties into
production is relevant. Cotton breeding for resistance
to adverse environmental factors requires the
availability of an appropriate source material, its
environmental
testing
and
a
comprehensive
assessment of the breeding material. From success in
increasing the resistance of varieties to adverse
environmental factors, first of all, depends on the
growth of the size and quality of the crop in adverse,
and, moreover, extreme conditions. The productivity
of cotton is determined by a combination of a number
of indicators, of which the mass of raw cotton in one
box and their number, such as the number of grains,
fiber yield, etc., have the greatest influence. According
to many authors [1–4], plant productivity has a close
correlation with the weight of the cob and the mass of
grain from the cob, to a lesser extent depends on the
height of the plant and the yield of grain. One of the
most common methods for assessing the productivity
of maize hybrids and lines is the identification of
genotypes by quantitative (indirect) traits [4].
Thus, rice varietal diversity is subdivided according to
geographical origin and morphological characteristics
into agroecotypes adapted to certain soil and climatic
conditions of cultivation [2]. Each ecotype is
distinguished by hereditary traits; when plants are
transferred to other conditions, it can retain or change
its hereditary features for several generations, while its
morphotype is preserved [3]. In order to reduce the
ecological dependence of varieties, it is necessary to
conduct targeted breeding for general adaptability to
unregulated environmental factors [5]. It is possible to
increase the efficiency of the breeding process by
having a genetically stable source material with
improved morphological features [6].
The purpose of the research is to evaluate the
manifestation of economically valuable traits of
families of the L-33 line with different types of
branching and to determine the degree of correlation
between the main economically valuable traits in
cotton plants.
MATERIALS AND METHODS
Experimental studies were carried out at breeding
nurseries in conditions of deep groundwater (8-10m)
Tashkent region and in the Syrdarya region in saline
soils with close groundwater (1.5-2m). Line L-33 is
divided into families with zero and 1 type of branching.
In the Tashkent region, they were sown according to
the scheme 60x30-1, and in the Syrdarya region,
according to the scheme 90x15-1. In the Tashkent
region, 4 irrigations were carried out, and in the
Syrdarya region, 1 irrigation.
Statistical processing of the obtained digital material
was carried out according to Dospekhov, [7] using the
Microsoft Excel software package.
22
Volume 04 Issue 03-2022
The American Journal of Agriculture and Biomedical Engineering
(ISSN
–
2689-1018)
VOLUME
04
I
SSUE
03
Pages:
20-24
SJIF
I
MPACT
FACTOR
(2020:
5.
34
)
(2021:
5.
554
)
(2022:
6.
291
)
OCLC
–
1121105746
METADATA
IF
–
7.125
Publisher:
The USA Journals
RESEARCH RESULTS
When growing cotton, various sowing schemes are
used, and plants with the limiting type of branching are
used in two-line and thickened crops. In this regard, the
study of the adaptive abilities of cotton families has a
certain practical significance. In table. 1 shows the
characteristics of families of line L-33 with different
types of branching in the conditions of Tashkent and
Syrdarya regions.
Table 1
Characteristics of families of line L-33 with different types of branching in the conditions of Tashkent and
Syrdarya regions.
Economically valuable features
Tashkent region
Syrdarya region
С-33/0
С-33/1
С-33/0
С-33/1
Weight of raw cotton of one
box, g
7,5+0,32
6,8+0,09
6,7+0,06
7,3+0,11
Limit of variability
6,2-10,1
5,1-10,6
5,0-8,7
5,1-9,9
Homeostatic
48
52
68
52
Fiber yield, %
40,1+0,61
41,3+0,02
39,6+0,19
39,7+0,23
Limit of variability
37,0-43,5
38,7-43,5
34,9-45,2
34,3-44,9
Homeostatic
724
1229
821
733
Weight of 1000 pieces of seeds,
g
123+2,45
117+1,02
120++1,04
122+1,29
Limit of variability
101-140
96-145
97-142
97-161
Homeostatic
1707
1457
1350
1240
Fiber index, g
8,25+0,26
8,23+0,08
7,82+0,08
7,98+0,08
Limit of variability
6,73-10,07
6,77-10,28
6,38-10,2
6,13-10,56
Homeostatic
72
91
76
84
Fiber length, mm
35,5+0,51
35,3+0,11
35,4+0,16
35,1+0,17
Limit of variability
34,2-38,9
33,9-37,5
32,2-39,2
32,0-38,9
Homeostatic
953
1338
772
780
From the given data, it can be seen that a larger box
was observed in C-33/0 in the conditions of the
Tashkent region, in the conditions of the Syrdarya
region in C-33/1. The limit of variability of this trait did
not have significant differences depending on the type
of branching and the place of cultivation. Similar
results were obtained in terms of homeostatic mass of
raw cotton in one box. The fiber yield indicators and
the limit of variability of this trait in the studied families
also did not have significant differences depending on
the type of branching and the place of
cultivation. The highest rate of homeostatic fiber
output was observed in the C-33/1 family in the
conditions of the Tashkent region. Similar results were
obtained for the trait of the mass of 1000 seeds. Here,
the highest homeostatic index was observed in the C-
33/0 family in the conditions of the Tashkent region.
There were no significant differences in fiber index.
23
Volume 04 Issue 03-2022
The American Journal of Agriculture and Biomedical Engineering
(ISSN
–
2689-1018)
VOLUME
04
I
SSUE
03
Pages:
20-24
SJIF
I
MPACT
FACTOR
(2020:
5.
34
)
(2021:
5.
554
)
(2022:
6.
291
)
OCLC
–
1121105746
METADATA
IF
–
7.125
Publisher:
The USA Journals
The same picture is observed in terms of fiber length.
This indicates a high adaptive capacity of families,
although the studied traits are subject to strong
variability depending on growing conditions. From the
above data, it can be seen that the highest rates of
homeostasis were observed in the C-33/1 family both in
the conditions of It is customary to determine the
indicators of economically valuable traits for a reliable
assessment by the correlation coefficient, which will
make it possible to establish the tightness of the linear
relationship between plant traits and determine the
quantitative parameters of the future breeding
material. The correlation coefficients between the type
of branching and the main economically valuable traits
are shown in Figure 1. According to the histogram data,
it can be seen that the most significant influence of the
correlation coefficients was observed on the traits of
raw cotton weight of one box, fiber yield and weight of
1000 seeds in the conditions of the Tashkent region.
The sign of the mass of raw cotton in one box is
associated with many elements and depends primarily
on the number and mass of seeds, fiber yield.
(Picture 1. Correlation dependence between the type of branching and the main economically
valuable features.)
Note: 1. type of branching - the mass of raw cotton in
one box; 2. type of branching - fiber output; 3.
branching type - weight of 1000 seeds; 4. type of
branching - fiber index; 5. type of branching - fiber
length;
As a result, there is a moderate correlation between
the type of branching and the mass of raw cotton in
one box, and in the conditions of the Tashkent region,
this dependence has a negative value. The correlation
between the type of branching - fiber yield and the
weight of 1000 seeds in the conditions of the Tashkent
region was positive in the first case, and negative in the
second. The remaining correlations were not
significant.
CONCLUSIONS
The obtained research results show a high adaptive
ability of families, although the studied traits are
subject to strong variability depending on growing
conditions. The highest rates of homeostasis were
observed in the C-33/1 family both in the conditions of
Tashkent and in the conditions of the Syrdarya region.
24
Volume 04 Issue 03-2022
The American Journal of Agriculture and Biomedical Engineering
(ISSN
–
2689-1018)
VOLUME
04
I
SSUE
03
Pages:
20-24
SJIF
I
MPACT
FACTOR
(2020:
5.
34
)
(2021:
5.
554
)
(2022:
6.
291
)
OCLC
–
1121105746
METADATA
IF
–
7.125
Publisher:
The USA Journals
A slight change in the indicators of the main economic
traits, depending on the growing conditions,
characterizes the high adaptive ability of this L-33 line.
And the preservation of indicators in families with
different types of branching allows using these families
to create varieties adapted to different sowing
patterns.
The most significant influence of the correlation
coefficients was observed on the basis of the weight of
raw cotton of one box, the yield of fiber and the weight
of 1000 seeds. Most of the correlations were not
significant
According to the results of the research, it was found
that this analysis of the relationship of quantitative
traits made it possible to identify patterns that can be
used in further work with families of the L-33 line. In
particular, to an average degree and in most cases, a
weak correlation between the type of branching and
the main economically valuable traits makes it possible
to create varieties based on families of L-33 lines with
different types of branching and high adaptive ability.
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