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Xinjiang Agricultural Sciences    2024, 61 (8): 0-0.   Abstract （59）      PDF （44862KB）（1150）       Knowledge map    Related Articles | Metrics | Comments（0）

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Effects of agronomic characters and photosynthetic parameters of glyphosate on sea island cotton QIN Guoli, WANG Weiran, WANG Meng, YANG Jing, HUANG Xinglei, LIU Zhiqing, ZHU Jiahui, Alifu Aierxi, KONG Jie, CHEN Guodong Xinjiang Agricultural Sciences    2023, 60 (12): 2861-2868.   DOI: 10.6048/j.issn.1001-4330.2023.12.001 Abstract （457）   HTML （36）    PDF （1491KB）（178）       Knowledge map    【Objective】To study the effects of agronomical character and leaf photosynthetic parameters by different concentrations of glyphosate on glyphosate island cotton in the hope of providing chemical skills for weeding.【Methods】Using glyphosate-resistant Xinchangmian 5 as the research object and spraying four concentrations of glyphosate1.25%, 2.5%, 5.0%, 10.0% at 10 leaf stage, respectively, then plant height, stem diameter, leaf stage and photosynthetic indexes were measured.【Results】Compared with the control, plant height, stem diameter, leaf stage, chlorophyll content, net photosynthetic rate (Pn), stomatal conductance (Gs), transpiration rate (Tr), maximum photochemical efficiency of PSⅡ(Fv/Fm) and potential activity of PSⅡ(Fv/Fo) with treated by four concentrations of glyphosate were all decreased in sea island cotton. The glyphosate with higher concentrations, the more dramatic decline. However, the intercellular CO2 concentration (Ci) showed an increasing trend. The treatment by 1.25% and 2.5% had no difference with control after 14 days of spraying, and the agronomic traits returned to the normal level after 24 days.【Conclusion】The growth trends reduce significantly by spraying 4 concentrations of glyphosate at the bud stage. More than 5% concentration of glyphosate affect the growth seriously sea island cotton Xinchangmian 5, so it is suggested that concentration below 2.5% of glyphosate be applied in production. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Xinjiang Agricultural Sciences    2024, 61 (10): 0-0.   Abstract （76）      PDF （19233KB）（159）       Knowledge map    Related Articles | Metrics | Comments（0）

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QTL mapping and genomic selection of maize leaf width SUN Fenglei, REN Jiaojiao, LEI Bin, GAO Wenwei, QU Yanying Xinjiang Agricultural Sciences    2023, 60 (10): 2341-2351.   DOI: 10.6048/j.issn.1001-4330.2023.10.001 Abstract （437）   HTML （62）    PDF （1733KB）（155）       Knowledge map    【Objective】 To discover candidate genes related to drought resistance in the hope of providing theoretical basis for subsequent identification and identification and evaluation of drought resistance of cotton and research on drought resistance genes.【Methods】 In this experiment, 20 extreme drought and drought sensitive materials selected from recombinant inbred lines were constructed from Upland Cotton Shiyuan 321 and Kui 85-174.The extreme drought and extremely sensitive drought pools were constructed respectively, BSA sequencing was analyzed with the parents, and candidate genes were mined by BSA sequencing analysis using the upland cotton genome as a reference.【Results】 The results showed that they were finally associated with 3 related candidate regions.The total length of the candidate regions was 6.12 Mb, which contained a total of 86 genes.Combining GO annotation, KEGG pathway and five key indicators selected in the previous stage, through qRT-PCR detection and analysis, a total of 5 candidate genes were finally determined.【Conclusion】 The expression levels of the five genes in leaves were significantly higher than those in roots and stems.And the expression levels in drought-resistant materials were all higher materials with weak drought resistance, and the overall trend was “rising first and then falling”. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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QTL mapping and genomic selection of maize leaf width CHEN Zhanhui, SUN Qiang, REN Jiaojiao, HUANG Bowen, XU Jiabo, YANG Jie, WU Penghao Xinjiang Agricultural Sciences    2023, 60 (7): 1606-1613.   DOI: 10.6048/j.issn.1001-4330.2023.07.006 Abstract （957）   HTML （17）    PDF （853KB）（146）       Knowledge map    【Objective】 To carry out ggenetic analysis of the leaf width of maize and detection of major QTL controlling leaf in the hope of providing an important theoretical basis for breeding maize with ideal plant type.【Methods】 In this experiment, the F2∶3 family was constructed from the maize inbred lines B73 and Zheng 58 which were genotyped by liquid phase 48k probe capture technology and phenotyped in multi-environment trails for QTL mapping and genomic selection.【Results】 The results showed that the leaf width displayed significant differences in genotype, environment, and genotype and environment interaction.The broad-sense heritability was 0.39.A total of 12 QTL distributed on chromosomes 1, 3, 4, 5, 8 and 10 were identified for leaf width.The phenotypic variation explained of each QTL ranged from 3.75% to 16.17%.Two loci, located on bin1.06 and bin5.01, were stable QTL detected in multiple environments.The QTL located on bin 5.01 was a major QTL, which could be used for fine mapping.When the number of SNPs reached 300 and the training population size reached 50%.【Conclusion】 Leaf width is controlled by major polygenes, and genome selection can accelerate the efficiency of leaf wide traits. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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ORF5 gene analysis of two porcine reproductive and respiratory syndrome virus strains from hainan province MA Jiamei, ZHONG Zhiwen, FAN Yuexuan, HUANG Chunyuan, ZHENG Jiaxin, CAO Fangfang, WANG Jinquan, LIU Guangliang, CAO Zongxi Xinjiang Agricultural Sciences    2023, 60 (12): 3049-3056.   DOI: 10.6048/j.issn.1001-4330.2023.12.021 Abstract （203）   HTML （73）    PDF （1605KB）（144）       Knowledge map    【Objective】This project aims to identify the evolutionary relationship of two newly discovered porcine reproductive and respiratory syndrome virus strains HNHK1-2021 and HNLG1-2021 in Hainan,China.【Methods】The ORF5 gene was amplified and sequenced by PCR method. Multiple sequence alignment was performed using MegAlign software, and phylogenetic tree was constructed using MEGA X software neighbor joining method.【Results】The nucleotide similarity of PRRSV HNHK1-2021 and HNLG1-2021 strains was 82.9%, and the deduced amino acid similarity was 82.6%. HNHK1-2021 strain and NADC30-like PRRSV, QYYZ-like PRRSV, VR2332-like PRRSV and JXA1-like PRRSV sequence alignment: 80.8%-82.8%, 90.2%-92.0%, 82.1%-83.4%, 81.9%-84.4%,deducing the amino acid similarity was 82.1%-84.6%, 91.5%-94.5%, 80.1%-83.1%, 82.6%-84.6%; HNLG1-2021 strain and NADC30 PRRSV, QYYZ PRRSV, VR2332 PRRSV and JXA1 PRRSV sequence alignment, the nucleotide similarity of which was 83.7%-84.6%、81.8%-83.6%, 97.7%-99.5%, 85.6%-90.4%, the deduced amino acid similarity was 83.6%-85.1%, 81.1%-82.6%, 96%-98.5%, 86.1%-90.5%.【Conclusion】The two virus strains belong to the North American type PRRSV, and the HNHK1-2021 strain belongs to the QYYZ class PRRSV (lineage 3). The HNLG1-2021 strain belongs to the VR-2332 class of PRRSVs (lineage 5). Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Evaluation and index screening of heat resistance of Gossypium hirsutum germplasm resources WANG Peng, ZHENG Kai, ZHAO Jieyin, GAO Wenju, LONG Yilei, CHEN Quanjia, QU Yanying Xinjiang Agricultural Sciences    2023, 60 (9): 2081-2090.   DOI: 10.6048/j.issn.1001-4330.2023.09.001 Abstract （498）   HTML （51）    PDF （1450KB）（143）       Knowledge map    【Objective】 This study first comprehensively evaluated the heat resistance of 24 Gossypium hirsutum germplasm resources.【Methods】 Based on the two-year comprehensive evaluation of heat resistance D value cluster analysis.Selecting 24 cotton germplasm materials.Randomized block design.Measurement of relevant indicators.【Results】 It was found that 24 Gossypium hirsutum resource materials could be divided into 3 categories.The first category was heat-resistant materials, the second category was intermediate-type materials, and the third category was heat-sensitive materials.An evaluation model for the heat resistance of Gossypium hirsutum was established through a stepwise regression equation: D=-0.111+0.175X2+0.470X3+1.211X4 (R2=0.914,8).According to the established optimal regression equation, the heat resistance of Gossypium hirsutum materials, the comprehensive evaluation indexes of cotton heat resistance were established.Correlation analysis and difference analysis found that seed cotton yield, boll weight and lint yield could be used as evaluation indicators of cotton field heat resistance, while plant height and lint had nothing to do with heat resistance.【Conclusion】 In this study, four heat-resistant Gossypium hirsutum resource materials were selected, and the seed cotton yield, boll weight and lint yield were established as the indicators for evaluating the field heat resistance of Gossypium hirsutum, and the peroxidase, malondialdehyde and chlorophyll content were used indoors.The index of heat resistance evaluation provides a reference for the rapid breeding of heat-resistant cotton varieties and the research of cotton heat-resistant mechanism. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Xinjiang Agricultural Sciences    2023, 60 (12): 0-0.   Abstract （150）      PDF （13598KB）（127）       Knowledge map    Related Articles | Metrics | Comments（0）

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Xinjiang Agricultural Sciences    2023, 60 (10): 0-0.   Abstract （96）      PDF （6202KB）（117）       Knowledge map    Related Articles | Metrics | Comments（0）

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Effects of different seedling emergence water on soil salt content and cotton growth WAN Yanan, XING Zhi, SHI Yuanqiang, WANG Tangang, WANG Jichuan, LI Huiqin, MA Li, LI Wenjun, WU Bingrong Xinjiang Agricultural Sciences    2023, 60 (10): 2352-2360.   DOI: 10.6048/j.issn.1001-4330.2023.10.002 Abstract （1598）   HTML （29）    PDF （1320KB）（117）       Knowledge map    【Objective】 This study aims to study the effects of drip seedling emergence on soil salt characteristics and cotton growth in cotton field in southern Xinjiang under the condition of no irrigation in winter and spring.【Methods】 Xinluzhong 67 was taken as the test material, three seedling emergence water quantities, 150 m3/hm2 (W1), 300 m3/hm2 (W2) and 450 m3/hm2 (W3) respectively, were set to observe the dynamic changes of soil pH and salt content, cotton seedling emergence rate, agronomic characters, dry matter accumulation characteristics and yield characteristics.【Results】 The pH of topsoil treated with W3, W2 and W1 decreased by 0.57, 0.43 and 0.19, respectively at the seedling stage, and the salt content decreased by 44.19%, 38.70% and 28.72%, respectively, but the salt washing effect decreased gradually after the full bud stage.The emergence rate of W2 treatment was 87.31%, which increased by 11.44 and 5.78 percentage points respectively compared with W3 and W1.The greater the amount of seedling emergence water, the greater the index value of cotton agronomic characters.The plant height and stem diameter of W3 treatment increased by 2.71%, 8.31% and 5.15%, 8.18%, respectively compared with W2 and W1.The average leaf area index (LAI) of W3 treatment increased by 7.57% and 11.46%, respectively compared with W2 and W1.The total dry matter accumulation of shoot treated with W3 increased by 5.55% and 7.75%, respectively compared with W2 and W1.The dry matter distribution coefficient of stem was W1 > W2 > W3, and that of leaf and reproductive organ was W3 > W2 > W1.The amount of seedling emergence water had a certain impact on the number of bolls per plant, but had little impact on the boll weight and lint percentage.The number of bolls per plant, boll weight and lint percentage of W3 treatment were the largest, but the harvested density of W2 treatment was the largest, and the final yield of W2 treatment was the highest, but there was no significant difference with W3 treatment.【Conclusion】 Higher seedling emergence water can significantly reduce the pH value and salt content of soil surface during seedling emergence, promote the growth of cotton plant and the effective accumulation of dry matter, which is conducive to the formation of yield components per plant.However, too much irrigation will affect the seedling emergence rate.The yield is higher when the seedling emergence water of drip irrigation is 300~450 m3/hm2. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Xinjiang Agricultural Sciences    2023, 60 (7): 0-0.   Abstract （76）      PDF （34100KB）（116）       Knowledge map    Related Articles | Metrics | Comments（0）

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Effects of planting mode and irrigation quota on yield and fiber quality of machine-picked long-staple cotton WANG Xin, LIN Tao, CUI Jianping, WU Fengquan, TANG Zhixuan, CUI Laiyuan, GUO Rensong, WANG Liang, ZHENG Zipiao Xinjiang Agricultural Sciences    2023, 60 (8): 1821-1829.   DOI: 10.6048/j.issn.1001-4330.2023.08.001 Abstract （322）   HTML （34）    PDF （1179KB）（109）       Knowledge map    【Objective】 Effects of planting mode and irrigation quota on yield and fiber quality of machine-picked long-staple cotton and provide a theoretical basis for improving the quality of machine-picked long-staple cotton.【Methods】 This study adopted a split-plot experimental design.Under the same planting density, three planting patterns were set: one film with three rows (S3), one film with four rows (S4), and one film with six rows (S6).The three irrigation quotas were: 3,150 m3/hm2 [W1, severe deficit (field capacity 50%)], 4,050 m3/hm2 [W2, mild deficit (field capacity 75%)] and 4,980 m3/hm2 [ W3, slight deficit (field capacity 100%)].【Results】 Under different row spacing and irrigation quota, the accumulation of cotton dry matter conformed to the logistic growth function model.Under the same irrigation quota, with the expansion of the average row spacing, it enter the period of rapid dry matter accumulation earlier and increase Vm.The average Vm of S3 treatment 0.62 and 0.77 g/(plant·d) higher than that of S4 and S6 treatments, respectively.Under the same planting mode, with the increase of irrigation quota, the dry matter accumulation rate faster and the rapid accumulation period longer.The increase of average row spacing and irrigation quota significantly improved the number of bolls per plant and the quality of bolls, and finally increased the yield.There was no significant difference between W2 and W3 treatments.In terms of defoliation and branch hanging, under the same irrigation quota, with the expansion of the average row spacing, the defoliation rate of long-staple cotton was significantly increased, and the hanging branch rate was significantly reduced; under the same planting mode, with the increase of irrigation quota, oth leaf rate and branch hanging rate were significantly increased.In the interaction between the production and fiber quality, the defoliation rate of S3W3 treatment was the highest, and the branch hanging rate of S3W1 treatment was the lowest.In terms of fiber quality, the half-average length, uniformity and textile parameters increased with the increase of the average row spacing; the effect of irrigation quota on fiber quality was not significant, but the W1 treatment showed better fiber quality.【Conclusion】 The combination of equal row spacing and mild deficit irrigation (S3W2) is beneficial to the transfer of dry matter accumulation to reproductive organs, and the number of bolls per plant and the weight of single bolls are significantly increased, which is different from the seed cotton yield under the full irrigation treatment.And the defoliation rate is higher, the leaf hanging rate is lower, and the fiber quality is better. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Xinjiang Agricultural Sciences    2024, 61 (6): 0-0.   Abstract （46）      PDF （17461KB）（107）       Knowledge map    Related Articles | Metrics | Comments（0）

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Identification of TRM gene family and fiber quality related excellent haplotype analysis in Gossypium hirsutum L. WANG Kaidi, GAO Chenxu, PEI Wenfeng, YANG Shuxian, ZHANG Wenqing, SONG Jikun, MA Jianjiang, WANG Li, YU Jiwen, CHEN Quanjia Xinjiang Agricultural Sciences    2024, 61 (3): 521-536.   DOI: 10.6048/j.issn.1001-4330.2024.03.001 Abstract （829）   HTML （59）    PDF （2167KB）（105）       Knowledge map    【Objective】 Identification of TRM gene family and fiber quality related excellent haplotype analysis in Gossypium hirsutum L.【Methods】 Bioinformatics was used to analyze the evolutionary relationship,physicochemical properties and cluster expression of TRM gene families.Candidate genes regulating fiber quality traits(fiber length,strength,and Macron value) were screened by gene haplotype analysis.【Results】 The analysis of physicochemical properties showed that the amino acids encoded by this family gene ranged from 376-1,093,with isoelectric points ranging from 4.64-9.56.Subcellular localization predicted that up to 60 TRM family genes were localized in the nucleus.The results of cis-acting element analysis showed that TRM gene family contained more elements related to light response,hormone response,stress response and growth and development.Transcriptome data showed that 60 TRM family genes were expressed preferentially during fiber development,which might regulate cotton fiber development.Furthermore,1,245 upland cotton materials were used to genotype TRM,and the number of haplotypes of each gene was found to be 1-8,and 14,18 and 15 excellent haplotype TRM genes related to fiber length,strength and Macron value were screened,respectively.Among them,11 genes had excellent haplotypes of length,strength and micronotype.The Hap_4 haplotype of GH_D09G0775 and the Hap_3 haplotype of GH_D03G1434 increased fiber length and strength while decreasing the Macron value.【Conclusion】 In this study,75 TRM family members were identified on 24 chromosomes in upland cotton(Gossypium hirsutum L.),which were systematically divided into cluster evolution Ⅰ-Ⅲ3 subtribe. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Effects of sowing date on stem traits and population dynamics of ultra late winter wheat TIAN Wenqiang, DONG Yanxue, SHI Yongqing, LEI Junjie, SUN Ganggang, WANG Hongyi, NIE Lingfan, GOU Fei, AI Hongyu, SHI Shubing, ZHANG Jinshan Xinjiang Agricultural Sciences    2023, 60 (6): 1301-1307.   DOI: 10.6048/j.issn.1001-4330.2023.06.001 Abstract （226）   HTML （5）    PDF （823KB）（104）       Knowledge map    【Objective】 To further explore the rules of stem traits and population dynamic changes of ultra-late sowing winter wheat in northern Xinjiang and study the growth difference between ultra-late sowing wheat and suitable sowing wheat in the hope of providing some theoretical basis for the winter wheat's high yield.【Methods】 Using a randomized block design, five ultra late sowing dates (T1, T2, T3, T4, T5) were set up, and local suitable sowing dates were used as control (CK). The differences in dynamic changes in stem traits, population total stem number, leaf area index (LAI), and dry matter weight of wheat main stem tillers were compared among wheat of different sowing dates.【Results】 Compared with CK, the average evenness of main stem and tiller of ultra late sowing wheat decreased by 11.19% and 25.99%, the average plant height decreased by 5.35% and 6.70%, the total internode length decreased by 9.27% and 14.83%, the third internode length decreased by 18.05% and 22.18%, the fourth internode length decreased by 25.73% and 11.89%, and the evenness of each treatment, plant height, and internode length of ultra late sowing wheat were the smallest in T3 treatment; The average internode diameter of the main stem had almost no difference, and the average internode diameter of the tiller decreased by 7.05%. The diameter indexes of T3 treatment were larger than those of other ultra late sowing wheat treatments; The peak value of total stem number decreased by 20.26% compared to the peak value of CK, the peak value of leaf area index decreased by 28.79%, and the dry matter weight at maturity decreased by 17.01%. With the growth of ultra late sowing wheat, the total stem number was the highest in T1 and the lowest in T3, both of the leaf area index and the dry matter weight were T1>T4>T2>T5>T3.【Conclusion】 Compared with winter wheat sown at suitable time, the plant height and uniformity of ultra late sown wheat in northern Xinjiang decrease, the difference in internode diameter is small, the total stem number, leaf area index, and dry matter of the population significantly decrease, and the population quality is poor. Through comprehensive consideration, ultra-late sowing wheat should be sown from late October to early November when there is no snow or frozen soil in the field, the emergence rate is high, thus obtaining a more reasonable population. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Research progress on sex pheromone identification and application of Asian corn borer LAN Chenyihang, YAO Yubo, ZHOU Junxiang, FU Kaiyun, DING Xinhua, YIN Xiaohui, LIU Wen, WANG Na, GUO Wenchao, DENF Jianyu Xinjiang Agricultural Sciences    2023, 60 (7): 1614-1622.   DOI: 10.6048/j.issn.1001-4330.2023.07.007 Abstract （725）   HTML （26）    PDF （1026KB）（103）       Knowledge map    【Objective】 Reviewing the domestic and foreign research progress on sex pheromone identification, comprehensive prevention and control and application of Asian corn borer in recent years, in order to provide an important reference for the monitoring, early warning and green prevention and control of Asian corn borer in my country.【Methods】 Statistical methods were used to collect literature data, and the progress of domestic and foreign literature on the research and application of sex pheromone control technology of Asian corn borer was analyzed. 【Results】 The Asian corn borer is distributed in China, South Korea, Japan, the Philippines, etc. Females release sex pheromones to attract males and then mate;The main sex pheromone components of the Asian corn borer were identified at home and abroad as cis/trans-12 tetradecanol acetate (Z/E-12-14:Ac) and n-tetradecyl acetate (14:Ac). The effects of each component were different, and there were geographical population differences in the proportion of components; At present, the sex pheromone products of the Asian corn borer have been widely used in monitoring, mass trapping and mating interference, and the integrated technology combined with other control technologies also has significant control effects; There are many factors affecting the trapping efficiency of sex pheromone lures during the application process, including sex pheromone dosage, trap type, placement height, color and environment, etc. 【Conclusion】 The Asian corn borer is distributed in the corn planting areas of many countries. There are geographical population differences in the proportion of sex pheromone of the Asian corn borer. The best component system of sex pheromone, combined with various factors affecting the trapping efficiency of sex pheromones, has achieved good results in field prevention and control of the Asian corn borer. China has assembled and integrated a set of green control technology based on sex pheromone to prevent and control the Asian corn borer. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Xinjiang Agricultural Sciences    2023, 60 (9): 0-0.   Abstract （180）      PDF （13223KB）（102）       Knowledge map    Related Articles | Metrics | Comments（0）

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Effects of chemical topping on plant architecture and yield of cotton with different fruit branch numbers and its screening of evaluation indicators MA Hui, LUO Dan, LI Xingxing, TIAN Liwen, DAI Lu, OU Huan, AImaierjiang Abulitifu, Aziguli Abulizi, Abuduaini Abuduweili Xinjiang Agricultural Sciences    2024, 61 (2): 261-270.   DOI: 10.6048/j.issn.1001-4330.2024.02.001 Abstract （401）   HTML （55）    PDF （1621KB）（102）       Knowledge map    【Objective】 To study effects of spraying chemical topping agent on plant architecture and yield of cotton and evaluation index screening with different number of fruit branches, then determine the best application period of cotton chemical topping, optimize the evaluation indexes of chemical topping in the hope of providing support for the application of chemical topping. 【Methods】 A completely random experimental design was adopted, manual topping was taken as the control, four chemical topping treatments when the number of fruit branches was 9, 10, 11 and 12 were established by selecting chemical topping agent Yaoqiansu and Xianglingzhuan, the plant height and plant height increased amount, length of the inverse first fruit branch to the inverse fourth fruit branch,effective branch rate, fruit nodes number per plant, stem diameter, main stem internodes number plant architecture related indexes, spatial distribution of bolls and seed cotton yield were measured.【Results】 Compared with manual topping, the plant height of cotton was significantly heighten on the condition of spraying chemical topping agent when the number of fruit branches per plant were 9, the fruit nodes number per plant increased in case of spraying Xianglingzhuan while the number of fruit branches per plant were 10 and on the condition of spraying Yaoqiansu when the number of fruit branches per plant were 11 and 12,main stem internodes number per plant increased and the length of the inverse first fruit branch to the inverse fourth fruit branch became even shorter after chemical topping, the effective branch rate in case of spraying Xianglingzhuan while the number of fruit branches per plant were 10, stem diameter after chemical topping, and the spatial distribution of bolls were not much different except the proportion of upper bolls on the condition of spraying Yaoqiansu when the number of fruit branches per plant were 9. There was no significant difference in the yield of seed cotton in case of spraying Xianglingzhuan while the number of fruit branches per plant was 10, on the condition of spraying Yaoqiansu, when the number of fruit branches per plant was 11 and 12, compared with manual topping. Effective branch count per plant (hereinafter referred to as effective branch count) rate could be used as an evaluation index of chemical topping on cotton plant architecture regulation.【Conclusion】 When the number of fruit branches per plant is 10 and 11, the effective branch rate and the number of fruit nodes per plant are the highest, the plant height growth is not large, and the seed cotton yield dose not reduce, the effective branch rate can be taken as the preferred evaluation index for the regulation of chemical topping on cotton plant architecture. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Diversity evaluation of machine-picked agronomic traits in Gossypium barbadense L. germplasm resources HUANG Xinglei, WANG Weiran, WANG Meng, ZHU Jiahui, LIN Feng, QIN Guoli, YANG Jing, Alifu Aierxi, WU Quanzhong, KONG Jie Xinjiang Agricultural Sciences    2024, 61 (1): 1-8.   DOI: 10.6048/j.issn.1001-4330.2024.01.001 Abstract （866）   HTML （38）    PDF （970KB）（100）       Knowledge map    【Objective】 The agronomic characters of sea island cotton germplasm resources were analyzed in order to provide candidate materials for its parent selection and variety cultivation in the future. 【Methods】 125 sea island cotton germplasm resources with zero fruit branches were selected to analyze the coefficient of variation,genetic diversity,correlation,principal component and agronomic characters. 【Results】 Indicating that the 125 sea island cotton germplasm resources in this study had great differences and were rich in germplasm diversity.The coefficient of variation of 12 characters was between 3.54% and 23.85%,and the genetic diversity index between 1.96 and 2.10.The results of correlation analysis showed that there was an extremely significant positive correlation between plant height and initial fruit branch height,initial fruit branch node position and boll weight,extremely significant positive correlation between initial fruit branch height and initial fruit branch node position and boll weight,and extremely significant positive correlation between middle fruit branch length and middle fruit branch length. The length of the lower fruit branch and the angle between the lower fruit branch were significantly positively correlated,so it is necessary to consider each other and analyze comprehensively when cultivating cotton varieties picked by machine. By principal component analysis,the cumulative contribution rate of 12 agronomic characters divided into 6 principal components reached 78.59%,which were plant height factor,fruit branch factor,stem diameter factor,lint percentage factor,boll number factor and boll weight factor. The germplasm resources of sea island cotton were divided into five groups by cluster analysis. The fifth group showed good mechanical picking characters,and the representative varieties were Xinhai 43,Xinhai 55,Shihezi V7-4,K426,Xin78,16DJC01,Xinku K2442 and Xinku 198-1. 【Conclusion】 The 125 resources are rich in diversity,and the clustering analysis of the fifth group shoes that it has good machine-harvestability,and 21 breeding materials with good machine-harvestability were obtained,which could be used as the basic machine-picked materials. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Analysis of the influence of different chemical treatments on the sealing effect of long staple cotton MA Hui, DAI Lu, LI Xingxing, Abuduaini Abuduweili, Aimaierjiang Abulitifu, TIAN Liwen, OU Huan Xinjiang Agricultural Sciences    2023, 60 (11): 2601-2608.   DOI: 10.6048/j.issn.1001-4330.2023.11.001 Abstract （249）   HTML （55）    PDF （889KB）（99）       Knowledge map    【Objective】 To study the effect of chemical detopping on long-fiber cotton in the hope of providing theoretical support for integration matching techniques of chemical detopping. 【Methods】 The tested long staple cotton variety is Xin 78,A complete randomized experiment design was used to analyze the effects of seven detopping treatments: “Yiding”, “Yiding”, “Xianglingzhuan”, “Shiyifu”, “Miandingfeng”, “Guoguangguandingtaocan” and Manual topping on influences of cotton plant height, yield and yield components, main fiber quality. At the same time, fuzzy comprehensive evaluation method base on entropy weight was applied to evaluate the 11 characters of each treatment.【Results】 The results showed that the plant height increment of pre and post the chemical detopping and artificial detopping treatments were 16.1-40.9 cm and 3.1 cm, respectively; “Yiding”treatent number of fruit branches pe cotton plant was compare with “Mianfengding”and Manual topping separately high 1.5units,1.8untits.boll number per plant of “Yiding” and “Yiding” treatments was significantly higher than those of “Shiyifu”, “Miandingfeng” and artificial detopping treatments, the boll weight of the “Shiyifu” treatment was significantly higher than that of the “Guoguangguandingtaocan” treatment by 0.23 g, lint percent of “Yiding” treatment was significantly higher than that of artificial detopping, “Yiding” and “Shiyifu” by 1.1, 1.2 and 1.3percentage points,the seed cotton yield of “Yiding” treatment was significantly higher than that of “Shiyifu”, artificial detopping and “Miandingfeng” treatment by 16.4%, 17.4% and 20.8%. The lint cotton yield of “Yiding” treatment was significantly higher than those of “Guoguangguandingtaocan”, “Xianglingzhuan”, “Shiyifu”, artificial detopping and “Miandingfeng” treatment by 15.4%, 16.0%, 20.8%, 21.2% and 22.9%, the strength and the length uniformity index had little difference, but it was significant for the micronaire value and length. The comprehensive evaluation of fuzzy method showed that the comprehensive performance of “Yiding”, “Yiding”, “Guoguangguandingtaocan” and “Xianglingzhuan” was better than artificial detopping.【Conclusion】 The plant height increment of chemical capping treatment is larger; chemical detpping has a significant effect on yield and yield components, micronaire value and length; “Yiding” treatment effect is the best, “Yiding”, “Guoguangguandingtaocan” and “Xianglingzhuan” treatment effect are second. Table and Figures | Reference | Related Articles | Metrics | Comments（0）