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doi:10.22092/ijcr.2020.121212

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	چکیده های انگلیسی
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مقاله 8، دوره 7، شماره 2 - شماره پیاپی 14، پاییز و زمستان 1398 اصل مقاله (74.4 K)
شناسه دیجیتال (DOI): 10.22092/ijcr.2020.121212
چکیده
***Iranian Journal of Cotton Researches* *Vol. 7, No. 2, 2020* *www.j**cri.ir* *Feeding effects of chitosan on third and fifth instars of the Cotton bollworm, Helicoverpaarmigera* (Lep.;Noctuidae) S. Kamari Haji Shooreh¹, M. Yazdanian²and M.H. Sarailoo²* ¹Former M.Sc. Student of Agricultural Entomology, Department of Plant Protection, Faculty of Plant Production, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran ²Assistant and Associate Prof. respectively, Department of Plant Protection, Faculty of Plant Production, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran Received: 2019/3/10 Accepted: 2020/1/9 Abstract In this research, digestive effects of different dose rates of two chitosans mixed with an artificial diet were investigated. Experiments were carried out under laboratory conditions (27+- 2 °C, 70+-5% R.H., and 16L:8D) at six dose rates of 0.0, 2.5, 4.0, 6.0, 8.0 and 10.0 gkg^-1 of diet on 3^rd and 5^th instars of the cotton bollworm. Larval mortality, and antigrowth and antifeedant effects were studied. All feeding experiments was conducted during two days because in both 3^rd and 5^th stadia lasted two days. According to the results, no mortality was observed in 3^rd and 5^th instars even by feeding from dose rate of 10.0 g kg^-1 of both chitosans. In contrast to expected results, feeding of 3^rd and 5^th instars of the cotton bollworm from high dose rates of 6.0, 8.0 and 10.0 g kg^-1 of both chitosans stimulated the growth and feeding of some larvae in each replication and inhibited the growth and feeding of other larvae in the related replication. In general, both chitosans inhibited the growth and stimulated the feeding of 3^rd instars, whereas stimulated both the growth and feeding of 5^th instars. Results of this study showed that for better understanding the effects of chitosan and its derivatives on mortality, growth and feeding of larval insects, much more investigations should be carried out on different taxonomic groups of insect pests as well as on their digestive enzymes. *Keywords: Cotton bollworm, Helicoverpaarmigera, Chitosan, Growth, Feeding **Iranian Journal of Cotton Researches* *Vol. 7, No. 2, 2020* *www.j**cri.ir* Evaluation of salt tolerance indices in cotton genotypes using GGE biplot method *M.Fathi Sadabadi^1 and S.J. Mirghasemi² ¹Assistant Prof. Cotton Research Institute of Iran, Agricultural Research, Education and Extension Organization (AREEO), Gorgan, Iran ²Researcher of Cotton Research Institute of Iran, Agricultural Research, Education and Extension Organization (AREEO), Gorgan, Iran Received: 2019/3/5 Accepted: 2019/11/2 Abstract In order to evaluate and compare of the new cotton genotypes and hybrids that were selected through numerous experiments in term of qualitative and quantitative traits, this project was conducted as a randomized complete block design with three replications in two areas of Hashemabad (no stress) and Anbaralum (salinity stress) during two years of 2013-2014. Thirty-eight genotypes were compared with two commercial cultivars of Golestan and Sepid (as control) were evaluated. The measured traits were included cotton yield (1^st, 2^nd and total harvest), yield components (boll weight, boll number, length and number of sympodial branches), plant height and earlinesspercentage). The results of variance analysis showed that there were significant differences between the genotypes in the years and locations of experimental for the majority of studied traits at a level of 5% or 1%. The highest yield under non-stress condition was was related to Er26, Tj82, Tj135 and DB24 genotypes but the ranking of treatments was different under stress conditions so that Tj174, Er34 and Tj135 genotypes had the highest yield under stress conditions, Genotypes of Er26, Er29 and Tj82 were superior to other genotypes in terms of tolerance index but according to stress sensitivity index (SSI), genotypes of Er29, Tj185 and Er26 were more sensitive. In the graph plotted by the GGE biplot software, the two components justified 94% of the variations. Finally, Tj135, Er38 and Tj82 were selected and introduced as the best and most tolerant genotypes for salinity tolerance. Keywords: Cotton, Genotype, Index, Tolerance to Salinity *Iranian Journal of Cotton Researches* *Vol. 7, No. 2, 2020* *www.j**cri.ir* Effect of planter type and seed variety on seedling emergence uniformity and seed cotton yield in Fars province *M. Roozbeh^1 and L. Jokar² ¹Assistant Prof. Agricultural Engineering Research Department,Fars Agricultural and NaturalResources Research and Education Center, AREEO, Shiraz, Iran ²Expert of StatisticDepartment,Fars Agricultural and Natural Resources Research and Education Center, AREEO, Shiraz, Iran Received: 2019/6/24 Accepted: 2019/11/2 Abstract Acceptable establishment of cotton seedlings is very important in achieving high yields. A field experiment was conducted to evaluate the effect of planter type and seed variety on emergence uniformity and establishment of cotton seedling. This experiment was conducted assplit-plot in a randomized complete block designwith three replications at Darab Agricultural Research Station. The seed varieties were included T2 (V1), Karisma (V2), Lidiya (3), Edisa (V4) and B440 (V5) as the main plots and four cotton planter type as the subplotsalso were included: grain drill with knife opener and conical press wheel (P1), cultivation combination with cultivator (seed drill) with single disk opener and bar covering device (P2), row crop planter with runner opener and rubber smooth-crown press wheel (P3) and direct drill with double disk opener and double rubber band press wheel (P4). The results showed that variety and planter type had a significant effect on sowing depth, germination rate, inter-plant distance, boll number and seed cotton yield. The P2 treatment compared to P1, P3, and P4, caused sowing depth increasing by 39.5%, and germination ratedecreasingby 52.1%. The highes andlowest number of boll were observed inr V3 × P3 and V4 × P2 interactions, respectively. The finding revealed that seed cotton yield was affected by different planters asP3>P4>P1>P2. The results of factor analysis indicated that sowing depth, inter-plant distance, and boll number were known as the most prominent indicesof sowing and cottonmorphological. Keywords: Cotton, Germination rate, Variety, Cotton Planter, Sowing depth *Iranian Journal of Cotton Researches* *Vol. 7, No. 2, 2020* *www.j**cri.ir* Study of the effect Cryopreservation on seed germination of Varamin and Sajedi cultivarsby vitrification method M. Kakaei^* Assistant Prof., Department of Agriculture, Payame Noor University, Hamedan Province, Asadabad Centre Received: 2019/6/24 Accepted: 2019/11/2 Abstract Germplasm is one of the most valuable resources in the field of science and agriculture, which is very important. The main objective of this study was to study the effect of ultrasound conservation invitro on the growth parameters of cotton seeds. Technique of liquid nitrogen storage is one of the methods for preserving seed and other plant tissues in which plant materials can be stored indefinitely and without loss of germination. This experiment was carried out using a completely randomized design with three replications as a factorial on cotton seeds (traits of germination percentage, root length and shoot length). The first factor was genotype with two levels (Varamin and Sajedi) and the second factor was the dewatering time of five levels (20, 40, 60, 80 and 100 minutes) and third factor was considered as type of soluble dewatering in two levels of (PVS2 and PVS3) and control. The results of a variance nalysis showed that the effect of cultivar, treatment time and type of solution on germination percentage, root length and shoot length were significant at 1% probability level (P<0.01). Interaction effect of cultivar treatment time was significant for root length and germination percentage (P<0.01). The effect of cultivar× type of solution on all traits was significant . The treatment time×type of solution significantly affected only shoot length, and the triple effect of genotype treatment time* solution type was only significant in terms of germination percentage (P<0.01). The results of this study can be used to protect cotton seeds germplasm. *Keywords: Cotton, Germination, Dewatering time, Frost, Liquid nitrogen **Iranian Journal of Cotton Researches* *Vol. 7, No. 2, 2020* *www.j**cri.ir* Field evaluation of different levels of nitrogen and growth promoting bacteria on yield and yield components of cotton in delayed cultivation *A. Gharanjiki^1 and A. Fallah Nosratabad² ¹Assistant Prof., Cotton Research Institute of Iran, Agricultural Research,Education and Extension Organization (AREEO), Gorgan, Iran ²Associate Prof., Soil and Water Research Institute, Agricultural Research,Education and Extension Organization (AREEO), Karaj, Iran Received: 2019/10/22 Accepted: 2020/2/22 Abstract** Nitrogen (N) is the most important element limiting crop production in cotton cultivation. As N deficiency in plant decreases the seedcotton yield, excessive N availability will negatively affect crop production,. Therefore, N fertilizer management is very important in cotton farming. Azotobacter and Azospirillum bacteria have been given much attention in agriculture due to non-symbiotic N fixation and improve plant growth and crop production. In order to investigate the effect of N and Azotobacter and Azospirillum bacteria on yield and yield components of delayed cultivation of cotton cv.Golestan, a field experiment was conducted with four levels of N fertilizer (0, 30, 60 and 90 kg ha^-1of urea ourceand four treatments of cotton seed inoculation with the two PGPR bacteria (no inoculation, Azotobacter, Azospirillumand equal combination of Azotobacterand Azospirillum bacteria). On bases of results, the effect of N fertilizer was significant on yield and yield components of cotton. Also, althoughseed inoculation with bacteria increased leaf N concentration, yield and other yield components of cotton did not show significant response to bacterial inoculation.The interaction effect between nitrogen and seed inoculation with bacteria was also not significant. According to this experiment's finding, in soil conditions of test site, for double-cropping cotton cv.Golestan, with expected yield less than 2 tons per hectare,nitrogen fertilizer of 75 kg ha^-1 is recommended. *Keywords: Azospirillum,Azotobacter, Golestan cotton cultivar **Iranian Journal of Cotton Researches* *Vol. 7, No. 2, 2020* *www.j**cri.ir* *Evaluation of distinctness, uniformity and stability of some Cotton (Gossypiumhirsutum* L.and G. barbadense) cultivars and genotypes morphological characteristics A. Hamidi^1, M.R. Vafai Tabar², E. baniani³and F. Khazae⁴* ¹Associate Prof.,Seed and Plant Certification and Registration Institute, Agriculture Research, Education and ExtensionOrganization(AREEO), Karaj, Iran ^2&3Associate and Assistant Prof. respectively,Cotton Research Department, Tehran Agricultural and Natural Resources Research andEducation Center, Agriculture Research, Education and Extension Organization(AREEO), Varamin, Iran ⁴Expert of Seed and Plant Certification and Registration Institute, Agriculture Research, Education and ExtensionOrganization(AREEO), Karaj, Iran Received: 2017/4/4 Accepted: 2020/1/11 Abstract In order to evaluate the qualitative morphological characteristics of 36 cotton cultivars and genotypes , 22 qualitative morphological characteristics was studied in Tehran Agriculture and Natural Resources Research Center at Varamin and Seed and Certificate Research Instituteat Karajduring 2012 to 2013 years.. Results showed that11 qualitative morphological characteristicsweredistinct.On the base of petal color, cultivars and genotypes divided into two groups of distinct yellow and creampetal . All yellow petal cultivars, long staple cottons and all cultivars and genotypes of cream petal were Upland cottons. Among the yellow petal cultivars, including Dr. Omoumi, Giza and Termez 14, the cultivar of Termez 14 was distinguished from the other two cultivars due to alignment of position of stigma relative to anthers,. Cream petal cultivars based on leaf shapewere also divided into two groups ofpalmate and lanceolate.Lanceolate cultivars and genotypes of 3 cultivars were, Sepid, Okra Leaf-Red and Super okra among which they distinguished boll longitudinal shape and seed color of fuzz. Palmate leaf shape cultivars and genotypes group which were evaluatedfor 31 cultivars and genotypes, were divided into 3 main groups based on boll longitudinal shape. The number of 20 cultivars and genotypes of this group were cultivars and genotypes with ovateboll longitudinal shape which also based on 7 qualitative morphological characteristicsincluding boll pitting of surface, bract dentations at green maturity, position of stigma relative to anthers, leaf lower side density of pubescence, plant shape at green maturity, seed fuzz density and plant type of flowering were distinguished from each other. *Keywords: Morphological qualitative characteristics, Cotton, Cultivar registration andDistinctness, Uniformity and Stability (DUS) test **Iranian Journal of Cotton Researches* *Vol. 7, No. 2, 2020* *www.j**cri.ir* Evaluation of Cotton Yield under Irrigation by treated domestic Wastewater *Y. Choopan^1, A. Khashei-Siuki² and A. Shahidi² ¹PhD student, Department of Water Engineering, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran ²Associate Professor: Department of Water Science and Engineering, Birjand University, Iran Received: 2018/10/17 Accepted: 2020/2/22 Abstract** In order to study the effect of treated domestic wastewater of Torbat-Heydarieh on cotton yield of Varamin cultivar (Gossypiumhirsutum L.), a field experiment was conducted as a randomized complete block design with five irrigation water treatments and 3 replications. Treatments included T₁ (well water as control treatment), T₂ (treated wastewater), T₃ (50% well water and 50% treated wastewater), T₄ (alternate irrigation of well water and treated wastewater), and T₅ ((66% treated wastewater and 33% well water combination) (used by regional farmers)). The results showed that the effect of irrigation water treatments on total yield in the first and second years was significant (P<0.01). The highest and lowest total yield in first year was related to T₃and control treatments at the rate of 3908 and 2342 kg ha^-1, respectively. Also, the highest and lowest total yield in the second year was observed in T₃and control treatments at the rate of 4173 and 3107 kg ha^-1, respectively. Totally, the results showed that the research treatments in the second year had a higher yield compared to the first year, so that the treatment of T₃with maximum total yield in the first and second years had the highest water use efficiency of 0.62 and 0.66 kg m^-3, respectively. *Keywords*: Cotton yield, Wastewater, Water use efficiency, Varamincultivar
عنوان مقاله [English]
English Abstracts
چکیده [English]
***Iranian Journal of Cotton Researches* *Vol. 7, No. 2, 2020* *www.j**cri.ir* *Feeding effects of chitosan on third and fifth instars of the Cotton bollworm, Helicoverpaarmigera* (Lep.;Noctuidae) S. Kamari Haji Shooreh¹, M. Yazdanian²and M.H. Sarailoo²* ¹Former M.Sc. Student of Agricultural Entomology, Department of Plant Protection, Faculty of Plant Production, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran ²Assistant and Associate Prof. respectively, Department of Plant Protection, Faculty of Plant Production, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran Received: 2019/3/10 Accepted: 2020/1/9 Abstract In this research, digestive effects of different dose rates of two chitosans mixed with an artificial diet were investigated. Experiments were carried out under laboratory conditions (27+- 2 °C, 70+-5% R.H., and 16L:8D) at six dose rates of 0.0, 2.5, 4.0, 6.0, 8.0 and 10.0 gkg^-1 of diet on 3^rd and 5^th instars of the cotton bollworm. Larval mortality, and antigrowth and antifeedant effects were studied. All feeding experiments was conducted during two days because in both 3^rd and 5^th stadia lasted two days. According to the results, no mortality was observed in 3^rd and 5^th instars even by feeding from dose rate of 10.0 g kg^-1 of both chitosans. In contrast to expected results, feeding of 3^rd and 5^th instars of the cotton bollworm from high dose rates of 6.0, 8.0 and 10.0 g kg^-1 of both chitosans stimulated the growth and feeding of some larvae in each replication and inhibited the growth and feeding of other larvae in the related replication. In general, both chitosans inhibited the growth and stimulated the feeding of 3^rd instars, whereas stimulated both the growth and feeding of 5^th instars. Results of this study showed that for better understanding the effects of chitosan and its derivatives on mortality, growth and feeding of larval insects, much more investigations should be carried out on different taxonomic groups of insect pests as well as on their digestive enzymes. *Keywords: Cotton bollworm, Helicoverpaarmigera, Chitosan, Growth, Feeding **Iranian Journal of Cotton Researches* *Vol. 7, No. 2, 2020* *www.j**cri.ir* Evaluation of salt tolerance indices in cotton genotypes using GGE biplot method *M.Fathi Sadabadi^1 and S.J. Mirghasemi² ¹Assistant Prof. Cotton Research Institute of Iran, Agricultural Research, Education and Extension Organization (AREEO), Gorgan, Iran ²Researcher of Cotton Research Institute of Iran, Agricultural Research, Education and Extension Organization (AREEO), Gorgan, Iran Received: 2019/3/5 Accepted: 2019/11/2 Abstract In order to evaluate and compare of the new cotton genotypes and hybrids that were selected through numerous experiments in term of qualitative and quantitative traits, this project was conducted as a randomized complete block design with three replications in two areas of Hashemabad (no stress) and Anbaralum (salinity stress) during two years of 2013-2014. Thirty-eight genotypes were compared with two commercial cultivars of Golestan and Sepid (as control) were evaluated. The measured traits were included cotton yield (1^st, 2^nd and total harvest), yield components (boll weight, boll number, length and number of sympodial branches), plant height and earlinesspercentage). The results of variance analysis showed that there were significant differences between the genotypes in the years and locations of experimental for the majority of studied traits at a level of 5% or 1%. The highest yield under non-stress condition was was related to Er26, Tj82, Tj135 and DB24 genotypes but the ranking of treatments was different under stress conditions so that Tj174, Er34 and Tj135 genotypes had the highest yield under stress conditions, Genotypes of Er26, Er29 and Tj82 were superior to other genotypes in terms of tolerance index but according to stress sensitivity index (SSI), genotypes of Er29, Tj185 and Er26 were more sensitive. In the graph plotted by the GGE biplot software, the two components justified 94% of the variations. Finally, Tj135, Er38 and Tj82 were selected and introduced as the best and most tolerant genotypes for salinity tolerance. Keywords: Cotton, Genotype, Index, Tolerance to Salinity *Iranian Journal of Cotton Researches* *Vol. 7, No. 2, 2020* *www.j**cri.ir* Effect of planter type and seed variety on seedling emergence uniformity and seed cotton yield in Fars province *M. Roozbeh^1 and L. Jokar² ¹Assistant Prof. Agricultural Engineering Research Department,Fars Agricultural and NaturalResources Research and Education Center, AREEO, Shiraz, Iran ²Expert of StatisticDepartment,Fars Agricultural and Natural Resources Research and Education Center, AREEO, Shiraz, Iran Received: 2019/6/24 Accepted: 2019/11/2 Abstract Acceptable establishment of cotton seedlings is very important in achieving high yields. A field experiment was conducted to evaluate the effect of planter type and seed variety on emergence uniformity and establishment of cotton seedling. This experiment was conducted assplit-plot in a randomized complete block designwith three replications at Darab Agricultural Research Station. The seed varieties were included T2 (V1), Karisma (V2), Lidiya (3), Edisa (V4) and B440 (V5) as the main plots and four cotton planter type as the subplotsalso were included: grain drill with knife opener and conical press wheel (P1), cultivation combination with cultivator (seed drill) with single disk opener and bar covering device (P2), row crop planter with runner opener and rubber smooth-crown press wheel (P3) and direct drill with double disk opener and double rubber band press wheel (P4). The results showed that variety and planter type had a significant effect on sowing depth, germination rate, inter-plant distance, boll number and seed cotton yield. The P2 treatment compared to P1, P3, and P4, caused sowing depth increasing by 39.5%, and germination ratedecreasingby 52.1%. The highes andlowest number of boll were observed inr V3 × P3 and V4 × P2 interactions, respectively. The finding revealed that seed cotton yield was affected by different planters asP3>P4>P1>P2. The results of factor analysis indicated that sowing depth, inter-plant distance, and boll number were known as the most prominent indicesof sowing and cottonmorphological. Keywords: Cotton, Germination rate, Variety, Cotton Planter, Sowing depth *Iranian Journal of Cotton Researches* *Vol. 7, No. 2, 2020* *www.j**cri.ir* Study of the effect Cryopreservation on seed germination of Varamin and Sajedi cultivarsby vitrification method M. Kakaei^* Assistant Prof., Department of Agriculture, Payame Noor University, Hamedan Province, Asadabad Centre Received: 2019/6/24 Accepted: 2019/11/2 Abstract Germplasm is one of the most valuable resources in the field of science and agriculture, which is very important. The main objective of this study was to study the effect of ultrasound conservation invitro on the growth parameters of cotton seeds. Technique of liquid nitrogen storage is one of the methods for preserving seed and other plant tissues in which plant materials can be stored indefinitely and without loss of germination. This experiment was carried out using a completely randomized design with three replications as a factorial on cotton seeds (traits of germination percentage, root length and shoot length). The first factor was genotype with two levels (Varamin and Sajedi) and the second factor was the dewatering time of five levels (20, 40, 60, 80 and 100 minutes) and third factor was considered as type of soluble dewatering in two levels of (PVS2 and PVS3) and control. The results of a variance nalysis showed that the effect of cultivar, treatment time and type of solution on germination percentage, root length and shoot length were significant at 1% probability level (P<0.01). Interaction effect of cultivar treatment time was significant for root length and germination percentage (P<0.01). The effect of cultivar× type of solution on all traits was significant . The treatment time×type of solution significantly affected only shoot length, and the triple effect of genotype treatment time* solution type was only significant in terms of germination percentage (P<0.01). The results of this study can be used to protect cotton seeds germplasm. *Keywords: Cotton, Germination, Dewatering time, Frost, Liquid nitrogen **Iranian Journal of Cotton Researches* *Vol. 7, No. 2, 2020* *www.j**cri.ir* Field evaluation of different levels of nitrogen and growth promoting bacteria on yield and yield components of cotton in delayed cultivation *A. Gharanjiki^1 and A. Fallah Nosratabad² ¹Assistant Prof., Cotton Research Institute of Iran, Agricultural Research,Education and Extension Organization (AREEO), Gorgan, Iran ²Associate Prof., Soil and Water Research Institute, Agricultural Research,Education and Extension Organization (AREEO), Karaj, Iran Received: 2019/10/22 Accepted: 2020/2/22 Abstract** Nitrogen (N) is the most important element limiting crop production in cotton cultivation. As N deficiency in plant decreases the seedcotton yield, excessive N availability will negatively affect crop production,. Therefore, N fertilizer management is very important in cotton farming. Azotobacter and Azospirillum bacteria have been given much attention in agriculture due to non-symbiotic N fixation and improve plant growth and crop production. In order to investigate the effect of N and Azotobacter and Azospirillum bacteria on yield and yield components of delayed cultivation of cotton cv.Golestan, a field experiment was conducted with four levels of N fertilizer (0, 30, 60 and 90 kg ha^-1of urea ourceand four treatments of cotton seed inoculation with the two PGPR bacteria (no inoculation, Azotobacter, Azospirillumand equal combination of Azotobacterand Azospirillum bacteria). On bases of results, the effect of N fertilizer was significant on yield and yield components of cotton. Also, althoughseed inoculation with bacteria increased leaf N concentration, yield and other yield components of cotton did not show significant response to bacterial inoculation.The interaction effect between nitrogen and seed inoculation with bacteria was also not significant. According to this experiment's finding, in soil conditions of test site, for double-cropping cotton cv.Golestan, with expected yield less than 2 tons per hectare,nitrogen fertilizer of 75 kg ha^-1 is recommended. *Keywords: Azospirillum,Azotobacter, Golestan cotton cultivar **Iranian Journal of Cotton Researches* *Vol. 7, No. 2, 2020* *www.j**cri.ir* *Evaluation of distinctness, uniformity and stability of some Cotton (Gossypiumhirsutum* L.and G. barbadense) cultivars and genotypes morphological characteristics A. Hamidi^1, M.R. Vafai Tabar², E. baniani³and F. Khazae⁴* ¹Associate Prof.,Seed and Plant Certification and Registration Institute, Agriculture Research, Education and ExtensionOrganization(AREEO), Karaj, Iran ^2&3Associate and Assistant Prof. respectively,Cotton Research Department, Tehran Agricultural and Natural Resources Research andEducation Center, Agriculture Research, Education and Extension Organization(AREEO), Varamin, Iran ⁴Expert of Seed and Plant Certification and Registration Institute, Agriculture Research, Education and ExtensionOrganization(AREEO), Karaj, Iran Received: 2017/4/4 Accepted: 2020/1/11 Abstract In order to evaluate the qualitative morphological characteristics of 36 cotton cultivars and genotypes , 22 qualitative morphological characteristics was studied in Tehran Agriculture and Natural Resources Research Center at Varamin and Seed and Certificate Research Instituteat Karajduring 2012 to 2013 years.. Results showed that11 qualitative morphological characteristicsweredistinct.On the base of petal color, cultivars and genotypes divided into two groups of distinct yellow and creampetal . All yellow petal cultivars, long staple cottons and all cultivars and genotypes of cream petal were Upland cottons. Among the yellow petal cultivars, including Dr. Omoumi, Giza and Termez 14, the cultivar of Termez 14 was distinguished from the other two cultivars due to alignment of position of stigma relative to anthers,. Cream petal cultivars based on leaf shapewere also divided into two groups ofpalmate and lanceolate.Lanceolate cultivars and genotypes of 3 cultivars were, Sepid, Okra Leaf-Red and Super okra among which they distinguished boll longitudinal shape and seed color of fuzz. Palmate leaf shape cultivars and genotypes group which were evaluatedfor 31 cultivars and genotypes, were divided into 3 main groups based on boll longitudinal shape. The number of 20 cultivars and genotypes of this group were cultivars and genotypes with ovateboll longitudinal shape which also based on 7 qualitative morphological characteristicsincluding boll pitting of surface, bract dentations at green maturity, position of stigma relative to anthers, leaf lower side density of pubescence, plant shape at green maturity, seed fuzz density and plant type of flowering were distinguished from each other. *Keywords: Morphological qualitative characteristics, Cotton, Cultivar registration andDistinctness, Uniformity and Stability (DUS) test **Iranian Journal of Cotton Researches* *Vol. 7, No. 2, 2020* *www.j**cri.ir* Evaluation of Cotton Yield under Irrigation by treated domestic Wastewater *Y. Choopan^1, A. Khashei-Siuki² and A. Shahidi² ¹PhD student, Department of Water Engineering, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran ²Associate Professor: Department of Water Science and Engineering, Birjand University, Iran Received: 2018/10/17 Accepted: 2020/2/22 Abstract** In order to study the effect of treated domestic wastewater of Torbat-Heydarieh on cotton yield of Varamin cultivar (Gossypiumhirsutum L.), a field experiment was conducted as a randomized complete block design with five irrigation water treatments and 3 replications. Treatments included T₁ (well water as control treatment), T₂ (treated wastewater), T₃ (50% well water and 50% treated wastewater), T₄ (alternate irrigation of well water and treated wastewater), and T₅ ((66% treated wastewater and 33% well water combination) (used by regional farmers)). The results showed that the effect of irrigation water treatments on total yield in the first and second years was significant (P<0.01). The highest and lowest total yield in first year was related to T₃and control treatments at the rate of 3908 and 2342 kg ha^-1, respectively. Also, the highest and lowest total yield in the second year was observed in T₃and control treatments at the rate of 4173 and 3107 kg ha^-1, respectively. Totally, the results showed that the research treatments in the second year had a higher yield compared to the first year, so that the treatment of T₃with maximum total yield in the first and second years had the highest water use efficiency of 0.62 and 0.66 kg m^-3, respectively. *Keywords*: Cotton yield, Wastewater, Water use efficiency, Varamincultivar


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