Gafurjon Gulomov, Bekhzod Sirojidinov

In this article, a comprehensive analysis of introgressive hybrid forms of cotton is more important than a separate analysis of quantitative traits for creating lines and varieties with a complex of valuable economic traits, and many scientific studies have been carried out on the application. Information on the methods of factorial and cluster analysis of local varieties and lines. It has been established that the level of dominance of the cotton weight in terms of the weight of one box, the length of the fibre, the yield of the fibre, and the weight of 1000 seeds is inherited in positive and negative intermediate, dominant and extremely dominant states. In order to maintain the state of positive heterosis achieved in these ranges, it is necessary to continue the work of genetic breeding research in the next generations. During the studies, cluster analysis of valuable farm marks of 10 parent forms, F₁ and F₂ of hybrid plants (cotton weight in one boll, 1000 pieces of seed weight, fiber output and fiber length), which were initially studied for cluster analysis, quantitative marks were used. The indicators of valuable economic marks of these ridges were determined and statistically analyzed in laboratory and field conditions.

Doschanova Manzura Babajanovna, Matyakubov Zafar Sharipovich, Ro`zmetov Rasulbek Sobirovich, Abdullaev Ikram Iskandarovich, Atajanova Shirin Masharipovna

This article shows the species composition of organisms and insects living in the nests of Anacanthotermes termites and their role in the life of termites and their number control. The importance of some vertebrates has been shown. Studies on the interaction and behavior of classes in termite nests belonging to the genus Anacanthotermes were carried out in termite nests in natural and laboratory conditions based on Korb's methods. In our conducted studies, 30 species of invertebrate arthropods belonging to 5 families and 16 genera were recorded living in termite nests as parasites, predators or disease spreaders.

Jumanov Г. T., Abdukarimov A. O., Ablakulova N. A., Khojiboboeva S. H., Kushiev H. H.

In this research work, genomic DNA from samples of 10 varieties of soft wheat was extracted by the STAB method. Quantitative and qualitative indicators of the isolated DNA were determined by spectrophotometric (Nootropic) and visual (gel electrophoresis) methods. PCR amplification was carried out on the basis of 10 pairs of SSR markers (Simple sequence repeat), in which isolated DNA samples were associated with wheat salt resistance genes. PCR products were analyzed by gel electrophoresis. The information structure of polymorphism(PIC) and heterozygosity(he) of the selected SSR markers were determined in the piccalc program. Based on the genetic polymorphism data obtained on the basis of SSR markers, a phylogenetic family tree of varieties was compiled using the UPGMA methodology with the help of Mega X program.

Т. О. Otenov, I. А. Grokhovatskiy, A. J. Ospanov, D. F. Arzibaev, X. Kutlimuratova, Sh. K. Dauletbaeva

The article presents a study of the biological and ecological features of introduced woody plants, their adaptability to anthropogenic desertification in the south of the Aral Sea region. Due to the consequences of anthropogenic impact of the Aral Sea region, there is an increase in the processes of soil salinization, an increase in the mineralization of groundwater and vegetation degradation. Thus, the shortening of the life of exotics is affected by the close occurrence of the groundwater level, which in most cases are highly saline. The closer the saline groundwater level is to the soil surface; the less exotics live.

Achilova Nazifa Rahmonqulovna

This article provides interesting and historical information on creativity in the formation of pedagogical competencies of future biology teachers, independent learning, as well as the organization of non-traditional biology lessons and increasing students' interest in teaching biology, the stages of improving the methodology of using modern teaching methods, its structure, content, and introduction into educational practice, the formation of skills are studied. It also provides information on the level of knowledge and skills of beginner teachers of biology in designing lesson plans based on interactive technologies.

Satipov G. M., Sapayeva G. A., Chinikulov B. Kh., Alloberganova Z. B.

In the article, the relative ability of five rye cultivars to measure different morpho-physiological parameters of drought tolerance, i.e. seed germination percentage, root length, shoot length and tolerance index were studied.

Sultonova K., Kushiev H. H.

In recent years, possibilities have been achieved based on the widespread use of in vitro methods in the preservation and development of biodiversity. The specificity of the morphogen response to the effects of growth regulators of the studied samples of Lagochilus inebriance in in vitro condition was determined using mineral nutrient media with different composition. The optimal medium was selected for the micropropagation of the studied L.inebriance samples; The addition of 0.1 μM BAP to the nutrient medium according to recipe B5 was noted to be effective; BDS medium containing 5.0 µM BAP and 2.0 µM NAA was used for samples of L. inebriance growing in laboratory conditions, and 0.4 µM BAP, 3.2 µM NAA for samples growing in greenhouse conditions and B5 nutrient medium supplemented with 2.3 μM IAA was noted to be the most effective. In the proliferative phase, the most effective cytokinin was BAP compared to TDZ and Kinetin.

Intizor Avazmetova, Abduvayeit Pazilov

In April 2022, in the northwestern part of Uzbekistan, one of the authors (I. Avazmetova) gathered 27 species of mollusks belonging to the Сochlicopa genus. In comparison with other territories, the malacofauna of this territory is generally not studied. The peculiarity of the conchological and the structure of the reproductive tract of this species forced it to be described as a new species for science (urgenchika sp.nov). there is no information on the malacofauna of the northwestern part of Uzbekistan until now.

Akhmedova Mokhira Shavkatovna, Doschanov Jalolbek Saparboyevich

This article presents the species composition and phenology of dragonflies distributed in the Khorezm oasis. When analyzing the results of the observations made in 2020-2021, four phenological groups were noted: spring-summer species, summer species, summer and autumn species, all-season-specific species (spring, summer, autumn). Accordingly, all-season-specific species (10 species) were numerically superior to others.

Utkirjon T. Jumanov, Khabibjon Kh. Kushiev, Abdulaziz O. Abdukarimov

This article describes the procedure for using digital technologies in the selection of salinization-resistant genotypes of winter wheat. 268 genotypes of soft wheat (Triticum aestivum L.) were obtained as experimental objects. The experiment was carried out on a pilot plot of a lightly salted field. The SSPS-17 program was used for statistical analysis of the primary data of the studied genotypes. With the help of this program, coefficients of variation, correlation and determination were calculated for 10 traits of genotypes. Factor analysis was used in the selection of salinization-resistant genotypes of winter wheat. At the same time, it is noted that productivity and the number of thorns strongly associated with it and the mass of thorns are one of the main criteria for the selection of genotypes resistant to salinization. In the case of gross selection of salt-resistant genotypes, it was recommended to pay attention to productivity, and in the case of individual selection, to the length of the spike and its weight. Using factor analysis, more than 20 mutant genotypes were selected and recommended as the primary source for selection. A digital database was formed on the genotypes of each studied winter wheat.