Susceptible genotypes

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  • Cotton is an important fiber cash crop of India and cotton leaf curl disease is the major biotic constraint that can significantly reduce the production and productivity of the crop. Gossypium hirsutum L. suffered losses in Northern part of India mainly in Haryana due to high incidence of cotton leaf curl disease (CLCuD) and “whitefly” which is the vector of this disease. Development of resistant variety to this disease is most effective, long term and safe method to tackle with this problem.

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  • Drought is the major stress limiting crop productivity and development in arid and semi-arid regions. Tomato genotypes have wide range of sensitivity to drought, two genotypes of tomato H-86 and EC-520061 were used in two different types of field experiment in 2016-2017 at Indian Institute of Vegetable Research, Varanasi. Each experiment was conducted in randomized complete block with three replications.

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Comparative analysis of expressed sequence tags (ESTs) between drought-tolerant and -susceptible genotypes of chickpea under terminal drought stress

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  • Pre-harvest sprouting (PHS) of rice greatly reduces the quality and economic value of grain, and PHS tolerance is one of the most important traits in rice breeding for lowland ecology. Pre-harvest sprouting (PHS) was evaluated using thirty four lowland rice genotypes in the field condition. The genotypes Dinesh, Saraswati, Hanseswari, Tulasi and Golak found highly tolerant to PHS. The most susceptible genotypes to PHS were Dubraj, Uday, Dhartri, Lunishree, Panke, Amulya, Utkalprava, Moti, Naveen and Biraj.

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  • Field trial was conducted for two consecutive years during kharif 2017 and 2018 at farmer`s field, Kadarmandalagi by using randomized block design (RBD). During kharif 2017, among the 20 genotypes screened indicated that lowest mean population of yellow mite and highest mean leaf hair density and trichome length were recorded in Chaitanya (MRC-7377) (0.29 yellow mite/ leaf) followed by Soumya (SRCH-55) and were superior to all the genotypes. While highest mean yellow mite population and least mean leaf hair density and trichome length were observed in Super fibre (KDCHB-407) (2.

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  • Present study was investigated to elucidate the role of antioxidative enzymes in imarting resistance to sucking pest attack. Antioxidative enzymes viz. SOD, CAT, POX, GR and APX were estimated in the leaves (2nd leaf & 6th leaf) of cotton genotypes infected by sucking pests at 50, 60 and 68 days after sowing (DAS) stage. The antioxidative enzyme activity before infection was maximum in 2nd & 6 th leaves of G. arboreum genotypes followed by G. hirsutum resistant genotypes and minimum in G. hirsutum susceptible genotypes.

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  • Maize (Zea mays L.) is a major food crop of global importance is greatly affected by turcicum leaf blight commonly called as northern leaf blight caused by fungal pathogen Exserohilum turcicum. The morphological and molecular screening of maize genotypes for resistance against turcicum leaf blight is very crucial in maize crop improvement programme. Morphologically genotypes were classified based on the disease severity as resistance and susceptible genotypes.

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  • Downy mildew, caused by Sclerospora graminicola (Sacc.) Schroet, is a disease of great economic significance in the production of pearl millet (Pennisetum glaucum). Host physiology particularly host metabolites and oxidising enzymes get disturbed due to attack of Sclerospora graminicola. Altered state of oxidative enzyme plays an important role in plant metabolism during pathogenesis. In the present investigation biochemical characterization of pearl millet genotypes - HHB 223 and 7042 S was carried out at 30, 40, 50 and 70 DAS.

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  • An experiment was conducted at College of Agriculture, Nagpur to screen forty different groundnut genotypes against tikka disease of groundnut during kharif, 2016-17 in randomized block design with three replications. Biochemical constituents of phenol, total sugar and chlorophyll at 45-50DAS (flowering stage) and 90DAS (pod development stage) were estimated from leaves of healthy and diseased samples. Forty genotypes of groundnut were screened for tikka disease under field condition.

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  • The present in vitro experiment was conducted at Agricultural College, Bapatla, Guntur, Andhra Pradesh to evaluate the stomatal frequency, level of total sugars, total proteins and total phenols in resistant and susceptible greengram genotypes against Cercospora leaf spot disease. Number of stomata per mm2 was found higher in susceptible genotypes (199.36 mm2 ) and lower in resistant genotypes (74.10 mm2 ) total phenols were found higher in resistant genotypes (0.99 mg/100mg) and lower in susceptible genotypes (0.54 mg/100mg) total proteins were found higher in resistant genotypes (1.

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  • Root and collar rot of okra incited by Macrophomina phaseolina is an emerging problem in many parts of Gujarat. Twenty okra genotypes were screened for their resistance to root and collar rot under field conditions for two seasons. For further confirmation of the field results, variability in protein profile of resistant and susceptible genotypes was studied using SDS PAGE. Results revealed that protein profile of genotypes exhibited considerable variation from each other. Number of bands varied from four in highly susceptible variety to nine in resistant variety.

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  • This study was undertaken to find out the potential source of resistance of okra to yellow vein mosaic virus under natural epiphytic condition. The experiment was conducted with ten genotypes/cultivars at Main Vegetable Research Station and Department of Biochemistry, B.A. College of Agriculture, Anand Agricultural University, Anand. Out of ten genotypes/cultivars GAO-5 was registered with the higher of peroxidase and polyphenol oxidase activities and minimum number of whitefly population at 35 and 60 days after germination (DAS) as compared to rest of all genotypes.

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  • Morpho-physiological and biochemical changes was carried out for 16 germplasm lines of Urdbean against disease powdery mildew caused by Erysiphe polygoni, where KUP-34 recorded as significantly high in leaf thickness, phenol content, trichome density, and lowest in total sugars, stomatal size, reducing sugars and non-reducing sugars compared to highly susceptible genotype LBG-623.

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  • Hundred genotypes of mungbean were screened against Mungbean Yellow Mosaic Virus (MYMV) disease. Among hundred genotypes screened, three genotypes namely LGG-593, KMP-24, and KMP-40 were found moderately resistant, nineteen genotypes viz., KMP-4, KMP-22, VBN-2-3, LGG-594, MGG-40-1, JNG-13, TK-6-1, BGG-1, VBN-2-3, LGG-410, LGG-410, KKM3-1, ICC-12947, LGG-592, KMP-1, KMP-22, KMP-23, KMP-17 and KMP-4 found moderately susceptible, sixty-six genotypes found susceptible and twelve genotypes were found highly susceptible.

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  • This study showed that drought stress reduced the yield of some genotypes, while others were tolerant to drought, suggesting genetic variability of drought tolerance in this material. Therefore, breeders can select stress-resistant wheat genotypes based on the MP, GMP, and STI indices.

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  • The molecular evaluation of twelve chickpea (Cicer arietinum L.) varieties (screened for their resistance to fusarium wilt) at the Department of Plant Pathology and Agriculture Microbiology in 2014-15 was conducted to assess the genetic diversity and relationship of chickpea genotypes using RAPD. Twenty five primers of RAPD were used of which 15 primers gave amplification products. A total 349 amplicons were obtained of which 331 amplicons were polymorphic with 93.64 % level of polymorphism was observed.

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  • Macronutrient specially K and micronutrient malnutrition, and particularly deficiency in zinc (Zn), iron (Fe) and manganese (Mn), afflicts over three billion people worldwide. A pot culture experiment was conducted to study the effect of water stress on potassium and some micronutrient accumulation in straw and grains of wheat genotypes. Eight wheat genotypes were grown, 4 tolerant and 4 susceptible against water stress for the experiment. Moisture stress treatment to plants was given at anthesis through withdrawal of water.

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  • Anthracnose of clusterbean caused by Colletotrichum capsici is widespread problem limiting the profitable cultivation depending on the weather condition. A Total fifteen entries including the checks were evaluated under field condition during kharif 2017 for their reaction against anthtracnose of clusterbean.

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  • An investigation was carried out at experimental block for soybean crops, Norman E Borlaug Crop Research Centre, Pantnagar with sixteen promising genotype of soybean to assess resistance to pod blight (PB, Colletotrichum truncatum) and Rhizoctonia aerial blight (RAB, Rhizoctonia solani). The experiment was conducted consecutively for natural infection for thirteen years during Kharif season of 2005 – 2017 following randomized block design with three replication. Results revealed that none of the genotypes showed absolute resistant or resistant reaction to either PB or RAB.

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  • A laboratory experiment was conducted to determine the resistance of 15 chickpea genotypes against pulse beetle, Callosobruchus chinensis (L.) under laboratory conditions. The mean per cent weight loss ranged from 62.48 to 33.92 per cent. The genotype PBG 5 (33.92%) recorded minimum per cent weight loss followed by GNG 469 (34.16%) and these were identified as tolerant genotypes. Whereas, the genotype Chaffa recorded highest per cent weight loss (62.48 %) followed by H 82-2(HC-1) (49.04%) and these were identified as susceptible.

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