Volume 02 Issue 09-2022 5 American Journal Of Biomedical Science & Pharmaceutical Innovation (ISSN – 2771-2753) VOLUME 02 ISSUE 09 Pages: 05-09 SJIF IMPACT FACTOR (2021: 5. 705) (2022: 5. 705) OCLC – 1121105677 METADATA IF – 5.896 Publisher: Oscar Publishing Services Servi ABSTRACT During the years of independence in our republic, based on the creation of a number of new varieties of medium and fine fibers with a complex of valuable economic characteristics of cotton, concrete results are achieved in the creation and introduction into production of sustainable medium and fine fiber varieties of cotton, genetically enriched to the impact of various extreme factors of cotton growing. KEYWORDS Marvarid, Namangan, Iolatan, G. hirsutum L. x G. barbadense L., Niyat, Hurma, Rakhmad, Darkham, G. mustelinum x “Beshkhahramon”, Heterosis. Research Article INHERITANCE OF FLOWERING PERIOD IN STANDARD AND INTERSPECIFIC F1 HYBRIDS OF G. HIRSUTUM L. AND G. BARBADENSE L Submission Date: September 10, 2022, Accepted Date: September 20, 2022, Published Date: September 30, 2022 Crossref doi: https://doi.org/10.37547/ajbspi/Volume02Issue09-02 G.A. Dusmatova Researcher Andijan State University, Uzbekistan G.A. Kimsanova Researcher Andijan State University, Uzbekistan G.O. Ergasheva Researcher Andijan State University, Uzbekistan M.A. Abduvakhapova, Researcher Andijan State University, Uzbekistan G. Dusmatova Researcher Andijan State University, Uzbekistan Journal Website: https://theusajournals. com/index.php/ajbspi Copyright: Original content from this work may be used under the terms of the creative commons attributes 4.0 licence. https://doi.org/10.37547/ajbspi/Volume02Issue09-02 https://scholar.google.co.in/scholar?q= https://www.mendeley.com/search/?page=1&query= https://theusajournals.com/index.php/ajbspi https://theusajournals.com/ https://doi.org/10.37547/ajbspi/Volume02Issue09-02 https://doi.org/10.37547/ajbspi/Volume02Issue09-02 https://theusajournals.com/index.php/ajbspi https://theusajournals.com/index.php/ajbspi https://theusajournals.com/index.php/ajbspi https://theusajournals.com/index.php/ajbspi Volume 02 Issue 09-2022 6 American Journal Of Biomedical Science & Pharmaceutical Innovation (ISSN – 2771-2753) VOLUME 02 ISSUE 09 Pages: 05-09 SJIF IMPACT FACTOR (2021: 5. 705) (2022: 5. 705) OCLC – 1121105677 METADATA IF – 5.896 Publisher: Oscar Publishing Services Servi INTRODUCTION In our conditions, early ripening determines the amount of harvest, the quality of cotton and fiber. In particular, after flowering, especially during the flowering period, the growth and development of cotton accelerates. According to the literature, the duration of the growing season in F1 plants crossbred G. barbadense L. varieties with G. darwini Watt was found to be inherited in dominant, super-dominant and intermediate states [1]. Boboev S.G'., Namazov Sh.E., Kholmurodova G.R., in their research on improving early ripening in hybrids involving several wild and cultivated types of cotton, mentioned that the involvement of early maturing varieties as fathers gives good results [2]. When studied by G.A.Dusmatova, I.T.Kakhorov, the level of heredity of the coat hair color indicators of interspecies (G. hirsutum L. x G. barbadense L.) and hybrid seeds obtained by cross-breeding is different, in most cases, reciprocal differentiation was determined, and the degree of heritability was shown to be related to the origin and genotype of their parental forms and the direct interaction of non-allelic genes [3]. In research, when ecologically distant forms of a species are interbred, their traits are inherited according to the same law as in ordinary hybridization. In this case, there is more opportunity to choose, and the varieties formed in very different conditions are expected to have some valuable traits (such as disease resistance, high fiber quality, large pods) that are not characteristic of local varieties [4]. The Main Findings and Results According to scientists’ research, the plant height of the Marvarid cotton variety in the optimal water regime is 100.7 cm, the number of bolls in one plant is 37.2 pieces, the biological maturity is 124.3 days, the weight of cotton in one boll is 3.5 g, the September cotton yield is 59.0 g/plant, the fiber length is 38.5 mm, 1000 the weight of the seed is 115.0 g, and 94.7 cm in water shortage, respectively; 36.5 units; 121.9 days; 3.2 g.; 60.6 g/plant; It was 37.7 mm and 110.1 g. The fiber of the variety belongs to the I-type, and its micronaire is 3.8-4.0. The variety is resistant to drought, pests (spider mite, bollworm, autumn nightworm) and is distinguished by rapid opening of bolls. In addition to the southern regions of our republic, it is also recommended for planting in regions with a water shortage and a temperate climate [5]. Kadyrov Sh.Yu. and others to study the correct selection of parental pairs when 7 varieties (Niyat, Hurma, Rakhmad, Darkham, AN-519, Davr, Khorezm- 127) and 2 ridges (L-86, L-14) were crossed with incomplete diallel , it was observed that plants with high ripening speed, pod opening speed and high productivity were obtained from hybrid populations [6]. A.A. Mamaroziev and others show that early ripening and fiber yielding traits of cotton are inherited in dominant and intermediate cases [7], Rafieva F.U. and Rizaeva S.M. when they analyzed the inheritance of the sign of requirement for day length in interspecies G. mustelinum x “Beshkhahramon” hybrid combinations, F1 hybrids showed a wide range of variation in flowering, flowering and fruiting under long day conditions, and in F2 hybrids under long day conditions [8]. Scientists have identified 10 promising G.barbadense L. species CCB-5, CCB-11, CCB-17, CCB-26, CCB-27, CCB-28, CCB-29, CCB-30, CCB-33 and CCB-36 those who evaluated their genotypes positively according to speed. Among them, 3 genotypes CCB-5, CCB-29 and CCB-36 were found to ripen faster in terms of the lower location of the first crop branch, the shorter period until the first flower and the first bud opening [9]. https://doi.org/10.37547/ajbspi/Volume02Issue09-02 https://scholar.google.co.in/scholar?q= https://www.mendeley.com/search/?page=1&query= https://theusajournals.com/index.php/ajbspi Volume 02 Issue 09-2022 7 American Journal Of Biomedical Science & Pharmaceutical Innovation (ISSN – 2771-2753) VOLUME 02 ISSUE 09 Pages: 05-09 SJIF IMPACT FACTOR (2021: 5. 705) (2022: 5. 705) OCLC – 1121105677 METADATA IF – 5.896 Publisher: Oscar Publishing Services Servi The time from planting to flowering of parental forms and F1 hybrids in our experiments was earlier Marvarid (69.9 days), Namangan-77, L-20 (71.2 days), 75007-11 (72.4 days), Iolatan-14 (73.6 days), in the UzFA-703 variety it was -75.4 days (Table 1). F1 Marvarid x Namangan-77 (65.4 days), Iolatan-14 x L- 20 (67.4 days), Iolatan-14 x UzFA-703 (67.3 days), Iolatan-14 x 75007-11 (68.8 days), L-20 x Iolatan-14 (68.4 days), Marvarid x UzFA-703 (68.0 days), Marvarid x 75007-11 (68.6 days) the first flower opened the earliest in hybrids, UzFA-703 x Marvarid and UzFA-703 x Namangan -77 (73.0 days) and in hybrids, it was found that it was opened for the longest time. The average duration of the opening of the first flower Iolatan-14 x Marvarid (69.1 days), Marvarid x Iolatan-14 (70.3 days), Iolatan x Namangan-77 (70.6 days), Namangan-77 x Iolatan-14 (70.2 days), UzFA-703 x Iolatan-14 (71.3 days), 75007-11 x Iolatan-14 (69.6 days), Namangan-77 x Marvarid (69.4 days), 75007-11 x Marvarid (69.7 days), Marvarid x L-20 (69.9 days) , L-20 x Marvarid (69.4 days), Namangan-77 x UzFA-703 (71.9 days), Namangan-77 x 75007-11 (69.3 days), 75007-11 x Namangan-77 (71.3 days), Namangan-77 x L-20 (69.2 days), L-20 x Namangan-77 (70.4 days), UzFA-703 x 75007-11 (72.2 days), 75007-11 x UzFA-703 (70.9 days), UzFA-703 x L -20 (71.1 days), L-20 x UzFA-703 (72.6 days), 75007-11 x L-20 (70.8 days), L-20 x 75007-11 (71.5 days) (Table 1). Table 1 Inheritance of the planting-flowering time marker in F1 plants of parental forms ♀ ♂ Iolatan - 14 Marvarid Namangan - 77 75007-11 UzFA -703 L-20 Iolatan -14 73,5±0,6 69,0±0,6 70,6±0,8 68,8±0,6 67,3±0,5 67,4±0,5 Ϭ 4.5 4.0 5.5 4.2 3.6 3.4 hp -1.3 -2.3 -7.0 -8.0 -4.1 Heterosis, % 93.9 96.0 93.5 89.2 91.6 Marvarid 70,3±0,8 69,9±0,6 65,4±0,5 68,6±0,9 68,0±0,5 69,9±0,6 Ϭ 5.7 4.2 3.3 6.5 3.3 4.2 hp -0.7 -5.5 -1.9 -1.6 -0.8 Heterosis, % 95.5 90.9 94.8 90.2 98.2 Namangan -77 70,2±0,8 69,4±0,8 71,9±0,8 69,3±0,5 71,9±1,0 69,2±0,3 Ϭ 5.8 5.6 5.3 3.3 7.0 2.5 hp -2.7 -1.5 -9.3 -0.8 -5.7 Heterosis, % 95.4 96.5 95.7 95.4 96.2 75007-11 69,6±0,7 69,7±0,9 71,3±0,9 72,3±0,9 70,9±0,9 70,8±1,0 Ϭ 4.7 6.3 6.3 6.1 5.9 6.8 https://doi.org/10.37547/ajbspi/Volume02Issue09-02 https://scholar.google.co.in/scholar?q= https://www.mendeley.com/search/?page=1&query= https://theusajournals.com/index.php/ajbspi Volume 02 Issue 09-2022 8 American Journal Of Biomedical Science & Pharmaceutical Innovation (ISSN – 2771-2753) VOLUME 02 ISSUE 09 Pages: 05-09 SJIF IMPACT FACTOR (2021: 5. 705) (2022: 5. 705) OCLC – 1121105677 METADATA IF – 5.896 Publisher: Oscar Publishing Services Servi hp -5.6 -1.0 -2.6 -1.9 -1.3 Heterosis, % 94.6 96.3 98.5 94.1 97.9 ЎзФА-703 71,3±0,8 73,0±0,6 73,0±1,0 72,1±0,6 75,4±0,7 71,1±0,5 Ϭ 5.8 4.4 7.1 4.4 4.7 3.7 hp -3.5 0.1 -0.3 -1.1 -1.0 Heterosis, % 94.5 96.8 96.8 95.7 94.3 Л-20 68,4±0,5 69,4±0,8 70,3±0,4 71,5±1,1 72,6±0,6 71,2±0,8 Ϭ 3.3 5.6 3.2 7.2 3.9 5.5 hp -3.3 -1.5 -2.7 -0.5 -0.3 Heterosis, % 93.0 97.4 97.8 98.8 96.3 Note: 1. The average indicator of the sign in F1 plants, day; 2. Standard deviation – Ϭ; 3. Dominance rate index (hp) 4. Heterosis % Inheritance of the period from planting to the first flower opening depending on the parent forms incomplete positive dominance in the UzFA-703 x Marvarid hybrid (hp=0.14), UzFA-703 x Namangan-77 and L-20 x UzFA-703 (hp=-0.3), Marvarid x Iolatan-14 (hp=-0.7), Namangan-77 x UzFA-703 (hp=-0.8), L- 20 x 75007-11 (hp=-0.5), incomplete negative dominance in Marvarid x L-20 (hp=-0.8) hybrids, negative complete dominance in 75007-11 x Marvarid and UzFA-703 x L-20 hybrids (hp=-1.0 ), Namangan-77 x 75007-11 (hp=-9.3), Iolatan-14 x UzFA-703 (hp=-8.0), Iolatan-14 x Marvarid (hp=-1.3), Iolatan-14 x Namangan-77 (hp=-2.3), Namangan-77 x Iolatan-14 (hp=-2.7), UzFA-703 x Iolatan-14 (hp= -3.5), Iolatan-14 x 75007-11 (hp= -7.0), 75007-11 x Iolatan-14 (hp= -5.6), Iolatan-14 x L-20 (hp= - 4.1), L-20 x Iolatan-14 (hp= -3.3), Marvarid x Namangan- 77 (hp=-5.5), Namangan-77 x Marvarid (hp=-1.5), Marvarid x UzFA-703 (hp= -1.6), Marvarid x 75007- 11 (hp=-1.9), L-20 x Pearl (hp= -1.5), 75007-11 x Namangan- 77 (hp=-2.6), Namangan-77 x L-20 (hp=-5.7), L- 20 x Namangan-77 (hp=-2.7), UzFA-703 x 75007-11 (hp=-1.1), 75007-11 x UzFA-703 (hp=-1.9), 75007-11 x L-20 (hp= -1.3) and in hybrids, it was inherited in a state of negative extreme dominance. CONCLUSION In short, it has been established that the inheritance of the time from sowing to flowering occurs in cases of negative extreme dominance and negative incomplete dominance, and the first flower opens in shorter periods in hybrids compared to parental forms. In particular, the flowers of interspecific hybrids Iolatan- 14 x UzFA-703 and Iolatan-14 x L-20 (67.4 days) opened the earliest. The flowering period of UzFA-703 variety was the longest, i.e. 75.4 days on average, when this variety was taken as a maternal form in interspecies hybrids, and in stand hybrids, the flowering period was longer. REFERENCES 1. Amanov B.Kh., Ernazarova Z.A., Rizaeva S.M. 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