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 VOLUME Vol.05 Issue07 2025 

PAGE NO. 37-40 

DOI 10.37547/ajahi/Volume05Issue07-07 

 
 
 
 

Evaluation of Technological Quality Indicators of Rice 

Samples Under the Conditions of Karakalpakstan 
 

 Kamalov Miyirbek Murat ogli 

Head of the Rice Selection and Seed Production Laboratory, Grain and Rice Scientific Production Association, Uzbekistan 

 

Adilbaeva Aysuliw Amanbay qizi 

Student of the Karakalpakstan Institute of Agriculture and Agrotechnologies, Uzbekistan 

 

Kazakbaeva Iroda Saparbaevna 

Student of the Karakalpakstan Institute of Agriculture and Agrotechnologies, Uzbekistan 

 

Ibraymova Ayzada Kewlimjay qizi 

Master's student at Berdakh Karakalpak State University, Uzbekistan 

 

 

 

Received: 24 May 2025; Accepted: 20 June 2025; Published: 22 July 2025 

 

Abstract: This study analyzed the technological quality indicators—such as head rice yield, broken grain ratio, and 
translucency—of rice variety samples adapted to the agroecological conditions of the Republic of Karakalpakstan. 
Based on the research results, rice samples with complex valuable agronomic traits such as D-8 otb D-133 K-99, 
D-281, D-18 Urazbay, and D-249, D-106 otb Damir (8) oct were identified. These samples demonstrated high 
technological quality and are recommended as starting materials for breeding programs.   

 

Keywords: Rice, variety, selection, grain, technological indicator. 

 

Introduction: Rice is one of the world’s major staple 
food crops, and with the growing global population, the 
demand for rice is increasing annually. In Uzbekistan, 
the rice industry plays a crucial role in ensuring national 
food security. In particular, rice cultivation in the 
Republic of Karakalpakstan is carried out under harsh 
agroclimatic conditions, making the development of 
highly productive and technologically suitable rice 
varieties adapted to the region’s environment a 
pressing issue. 

The region's specific climatic conditions—including 
saline soils with heavy texture, water scarcity, spring 
frosts, and a short growing season—negatively affect 
rice development. Therefore, creating early-maturing, 
stress-tolerant varieties that meet the requirements 
for technological processing is of significant 
importance. 

Karakalpakstan's geography and climate differ greatly 
from other regions of Uzbekistan. Located in the lower 
reaches of the Amu Darya, fields often contain various 
types of alluvial soils with differing salinity levels. The 
climate is hot and dry in summer, but spring 
temperatures remain cool until the second decade of 
May. Early frosts in the third decade of September limit 
the rice growing season due to insufficient biological 
active temperatures. 

The rice varieties currently cultivated in Karakalpakstan 
often do not fully meet the technological and industrial 
processing requirements, which necessitates 
comprehensive research into developing improved 
varieties. Soil salinity is the main factor behind the 
reduction in rice productivity and quality. Creating salt-
tolerant varieties is therefore a critical priority. 

 

https://doi.org/10.37547/ajahi/Volume05Issue07-07
https://doi.org/10.37547/ajahi/Volume05Issue07-07
https://doi.org/10.37547/ajahi/Volume05Issue07-07
https://doi.org/10.37547/ajahi/Volume05Issue07-07
https://orcid.org/0009-0002-8294-5405
https://orcid.org/0009-0002-8294-5405


American Journal Of Agriculture And Horticulture Innovations 38 https://theusajournals.com/index.php/ajahi 

American Journal Of Agriculture And Horticulture Innovations (ISSN: 2771-2559) 
 

 

Depending on these factors, it is necessary to develop 
early- and ultra-early-maturing rice varieties with high 
technological characteristics suitable for global 
markets. Under extreme environmental stress, the role 
of resistant varieties becomes especially important in 
increasing rice productivity. 

In addressing these challenges, the selection of 
appropriate hybrid combinations and varieties adapted 
to the soil and climatic conditions is crucial for 
improving rice yield and quality. Studying international 
and working collections under stress conditions to 
identify promising genotypes is one of the key 
solutions. Varieties selected from global collections can 
be used as donors for creating new, high-yielding, 
stress-resistant lines. 

Abiotic stresses such as drought, extreme 
temperatures, heavy metals, and salinity significantly 
impact the biochemical processes and development of 
crops, leading to reduced productivity and threatening 
food security. Among these stresses, salinity is the most 
widespread and detrimental factor, limiting plant 
growth, soil health, and crop yields [3]. 

Given the severe soil and climatic conditions of 
Karakalpakstan, developing resilient rice varieties is 
crucial to achieving stable productivity [1]. The region 
suffers from chronic water shortages, making irrigation 
a major challenge for farmers [2]. Therefore, scientific 
research focused on identifying rice varieties that are 
productive, salt-tolerant, disease- and pest-resistant, 
and commercially viable under these conditions is 
essential. 

METHODS 

The study was conducted at the Grain and Rice 
Scientific Production Association. Quantitative and 
qualitative evaluations of rice samples were carried out 
using methods based on the standards of the 
International Rice Research Institute (IRRI). 

Rice grains were polished using a Micromputer 
RicePolisher SKZ 111 B-4 model device. 

• Grain shape (L/W ratio) was determined. 

• External grain traits were assessed visually 
without instruments. 

• Each fraction was weighed with 0.01 g 
precision on an electronic scale and expressed in 
percentage: 

Percentage (%) = (Fraction mass / 100 g) × 100 

The following main indicators were calculated: 

• Total rice yield (%) = Whole + Broken + 
Fragments 

• Bran yield (%) = Bran mass / 100 × 100 

• Broken rice (%) = Broken mass / 100 × 100 

• Whole rice (%) = Whole rice mass / 100 × 100 

RESULTS AND DISCUSSION 

When studying the early-ripening characteristics of the 
studied variety samples compared to the widely 
distributed Gulistan (standard) variety in our republic, 
comparative analysis was conducted based on 
technological quality indicators compared to the 
"Gulistan" standard (Table 1). 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 



American Journal Of Agriculture And Horticulture Innovations 39 https://theusajournals.com/index.php/ajahi 

American Journal Of Agriculture And Horticulture Innovations (ISSN: 2771-2559) 
 

 

Table 1 Classification of technological quality indicators of samples selected from breeding nurseries 

 



American Journal Of Agriculture And Horticulture Innovations 40 https://theusajournals.com/index.php/ajahi 

American Journal Of Agriculture And Horticulture Innovations (ISSN: 2771-2559) 
 

 

According to experimental results, technological 
quality indicators were evaluated for 10 rice samples 
selected from breeding nurseries (Table 1). Based on 
seed structure, samples were divided into "large" and 
"d/z" (dense grain) groups. The translucency level 
ranged from 92-97%, indicating high-quality grain 
formation in these samples. 

Total rice yield varied from 68.3 g to 78.0 g, averaging 
73.18 g. This indicator corresponds to the medium-high 
rice yield category according to international 
standards. The highest rice yield of 78.0 g was recorded 
by sample D-76 D-19 D-173 otb 1(10)(2). 

Whole rice yield varied from 57.0 g to 70.4 g, averaging 
63.15 g. The highest whole rice yield was determined in 
samples D-8 otb D-133 K-99 (70.4 g) and D-281 D-18 
Urazbay (69.3 g). This indicates their resistance to 
breakage and high technological profitability during 
processing. 

Fragment yield varied from 3.4 g to 21.0 g, averaging 
10.56 g. The lowest fragment yield was in sample D-249 
D-106 otb Damir (8)oct (3.4 g), indicating mature and 
unbreakable grain characteristics. 

Additionally, total and whole rice yield percentages 
were shown, with the highest values around 

78.0% (total rice) and 70.4% (whole rice), which fully 
comply with international quality standards (according 
to IRRI: ≥70% whole rice yield is required for high-
quality varieties). 

CONCLUSION 

From the conducted research, it can be concluded that 
the selected rice varieties and samples with high 
indicators for whole grain yield, fragment content, and 
translucency were presented to breeding scientists for 
creating new types of varieties and samples. 

REFERENCES 

Abillayev U, Abdullayev B.U, Yesemuratova G.Q, 
Yesemuratov A. Peculiarities of salt-resistant rice 
cultivation in conditions of water scarcity and late 
arrival in Karakalpakstan. Prospects for cultivating 
cereal, legume, oil, and feed crops with high yield and 
quality resistant to global climate change. International 
scientific-practical conference. May 13, 2022, p. 149 

Sattarov M, Ergashev M. Evaluation of some drought-
tolerant rice varieties to resilient the impact of 
insufficient irrigation water in Shimbay, Karakalpak 
Republic. Collection of articles from the international 
scientific-practical conference "Modern methods of 
growing rice and legume crops and prospects for using 
resource-saving technologies." 2023, p. 38 

Tavakkoli E, Fatehi F, Koventri S, Rengasami P, 
McDonald GK. Additional effects of Na+ and Clions on 

barley growth under salinity stress. J. Exp. Bot., 
2011;62(6):2189-2203  


