STUDY OF GENETIC DIVERSITY IN UPLAND COTTON (GOSSYPIUM HIRSUTUM L.) OF COTTON LEAF CURL DISEASE RESISTANT AND SUSCEPTIBLE GENOTYPES BY USING ISSRS - TRƯỜNG ĐẠI HỌC Y KHOA VINH

Tìm thấy 10,000 tài liệu liên quan tới tiêu đề "Study of genetic diversity in upland cotton (Gossypium hirsutum L.) of cotton leaf curl disease resistant and susceptible genotypes by using ISSRS - Trường Đại Học Y Khoa Vinh":

STUDY OF GENETIC DIVERSITY IN UPLAND COTTON GOSSYPIUM HIRSUTUM L OF COTTON LEAF CURL DISEASE RESISTANT AND SUSCEPTIBLE GENOTYPES BY USING ISSRS

STUDY OF GENETIC DIVERSITY IN UPLAND COTTON GOSSYPIUM HIRSUTUM L OF COTTON LEAF CURL DISEASE RESISTANT AND SUSCEPTIBLE GENOTYPES BY USING ISSRS

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. First step in this direction is screening and identification of resistant sources and their incorporation in the agronomical superior genotypes/varieties.
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Assessment of tomato advanced lines to resistance of late blight

Assessment of tomato advanced lines to resistance of late blight

Experiment was conducted to screen different advanced lines and genotypes in line × tester mating design against late blight of tomato caused by Phytophthora infestans. One hundred genotypes were screened during winter season under field condition and data was recorded on 0 - 5 scale at 30, 60 and 90 days in which eleven genotypes were highly resistant, seventeen genotypes were resistant, nineteen genotypes were moderately resistant, twenty four genotypes were susceptible and twenty nine genotypes were highly susceptible.

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Molecular characterization of heterotic groups of cotton through SSR markers

Molecular characterization of heterotic groups of cotton through SSR markers

Knowledge of genetic diversity and relationships among breeding materials has a significant impact on crop improvement. Association between parental divergence and progeny performance has not been well documented in cotton (Gossypium hirsutum L.). This study was conducted to estimate genetic diversity based on simple sequence repeat (SSR) markers among the selected elite cotton genotypes belong to different heterotic groups developed at ARS, Dharwad.

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STUDIES ON HETEROSIS IN COTTON INTERSPECIFIC HETEROTIC GROUP HYBRIDS (G.HIRSUTUM X G.BARBADENSE) FOR SEED COTTON YIELD AND ITS COMPONENTS

STUDIES ON HETEROSIS IN COTTON INTERSPECIFIC HETEROTIC GROUP HYBRIDS (G.HIRSUTUM X G.BARBADENSE) FOR SEED COTTON YIELD AND ITS COMPONENTS

Line × tester analysis was undertaken to assess the magnitude of heterosis in 32 interspecific heterotic group hybrids (G. hirsutum x G. barbadense) of cotton for seed cotton yield and its components developed by crossing eight elite hirsutum lines with four elite barbadense testers during Kharif 2010-11 at Main Agricultural Research Station, Dharwad.

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Study on specific combining ability in upland cotton (G. hirsutum)

Study on specific combining ability in upland cotton (G. hirsutum)

Ten genetically diverse parental lines were crossed in diallel fashion (excluding reciprocals). Ten parental lines, forty five hybrids and two checks were studied in kharif, 2009. Observations were recorded on fifteen characters viz., days to 50 per cent flowering...

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Cultural and pathogenic variability of the different isolates of rhizoctonia solani causing root rot of cotton collected from Rajasthan

Cultural and pathogenic variability of the different isolates of rhizoctonia solani causing root rot of cotton collected from Rajasthan

The present study was undertaken on integrated management of root rot of cotton caused by Rhizoctonia solani to know the disease incidence; survey was carried out during 2017 in 18 villages of different six cotton growing district viz., Udaipur, Hanumangarh, Sri Ganganagar, Chittorgarh, Banswara and Dungarpur.

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Survey and pathogenicity of fusarium wilt disease in cotton fields of Tamil Nadu, India

Survey and pathogenicity of fusarium wilt disease in cotton fields of Tamil Nadu, India

Cotton is an important crop used globally for its natural fibre and seed. Fusarium wilt, caused by the fungus Fusarium oxysporum f. sp. vasinfectum, is a major disease of cotton capable of causing significant economic loss. The fungus persists in soil as chlamydospores and in association with the roots of susceptible, resistant and non-cotton hosts as well as in seed. In the present investigation, the major cotton growing areas of Tamil Nadu were surveyed for assessing the per cent wilt incidence, the maximum disease incidence of 28.47 per cent was recorded at Coimbatore (Loamy) followed by 24.65 per cent at Salem (Clay loam) and a minimum of 7.65 per cent incidence at Madurai with silty loam soil texture. The number of micro conidia was more as compared to macro conidia. Abundant chlamydospores were observed terminally and intercalary. The size of the macro conidia, micro conidia and chlamydospores of the virulent isolate TRY (Trichy) was 26.20x6.25µm, 13.65x4.18µmand11.87x11.48µmrespectively.
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Screening of blackgram genotypes for resistance against corynespora leaf spot and cercospora leaf spot

Screening of blackgram genotypes for resistance against corynespora leaf spot and cercospora leaf spot

Field screening was done under natural field conditions during rabi 2016- 17 to identify the sources of resistance in blackgram genotypes against leaf spot diseases caused by Corynespora cassiicola, Cercospora canascens. Out of sixteen blackgram genotypes evaluated only one genotype LBG 645 was moderately resistant, seven genotypes were moderately susceptible (KU-15-6, KU-15-13, LBG 790, LBG 787, PU31, LBG 792, LBG 791) and three genotypes were susceptible (LBG 709, KU-15-11, LBG 752) to both Corynespora leaf spot and Cercospora leaf spot.

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GENETIC DIVERSITY IN BRINJAL (SOLANUM MELONGENA L.)

GENETIC DIVERSITY IN BRINJAL (SOLANUM MELONGENA L.)

The present study was undertaken with the aim of examining the magnitude of genetic diversity and characters contributing to genetic diversity among brinjal genotypes for a planned breeding programme.

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SCREENING OF MAIZE INBRED LINES AND POPULARLY GROWN HYBRIDS AGAINST BANDED LEAF AND SHEATH BLIGHT DISEASE INCITED BY RHIZOCTONIA SOLANI F. SP. SASAKII EXNER

SCREENING OF MAIZE INBRED LINES AND POPULARLY GROWN HYBRIDS AGAINST BANDED LEAF AND SHEATH BLIGHT DISEASE INCITED BY RHIZOCTONIA SOLANI F. SP. SASAKII EXNER

Banded Leaf and Sheath Blight (BLSB) disease caused by Rhizoctonia solani f. sp. sasakii Exner was studied in 22 inbred lines and 12 hybrids at the Regional Agricultural Research Station farm, Lam, Guntur, during rabi 2014-15 for evaluating resistance. Out of 22 inbred lines, PFSR9-2 had shown resistant reaction whereas PFSR6-1, PFSR6-2 and PFSR18 were found to be moderately resistant to BLSB disease. In case of hybrids, DHM 117 is the only hybrid which had shown resistant reaction, DKC9145, DKC9133 and KMH3110 were found moderately resistant and the remaining have shown susceptible reaction. The laboratory and field evaluation data corresponded in actual disease rating as well as in terms of categorization in to resistant, moderately resistant, susceptible and highly susceptible.
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Expression profiling of resistance gene analogs from French bean (Phaseolus vulgaris L.) for the manifestation of rust (Uromyces phaseoli L.)

Expression profiling of resistance gene analogs from French bean (Phaseolus vulgaris L.) for the manifestation of rust (Uromyces phaseoli L.)

The resistant french bean genotype Arka Anoop and susceptible genotype Arka Sharath were used for expression profiling of RGAs for the manifestation of rust. Leaf tissue was collected from both resistant and susceptible genotypes which were challenged with rust spores separately at 15 DAI and 45 DAI and synthesized cDNA. The expression level of selected 10 RGA genes of french bean was measured in both resistant and susceptible genotype rust inoculated leaf tissues separately at 15 DAI and 45 DAI. At 15 DAI, in case of pathogen challenged leaf of resistant genotypes, the 9 COHFBRGA genes (COHFBRGA1 to COHFBRGA38 except COHFBRGA2) were up-regulated with a fold change range of 0.79 to 169.01 and COHFBRGA2 was down regulated with a fold change of 0.79. Whereas, at 30 DAI in the resistant genotype, all RGA genes were up-regulated with a fold change range of 20.01 (COHFBRGA9) to 115.69 (COHFBRGA25). In case of susceptible genotype, 5 RGA genes with the fold change ranged between 1.59 and 11.10 (15 DAI) and 7 RGA genes with 0.10 (COHFBRGA38) to 19.29 (COHFBRGA9) were down-regulated. Highest fold expression was found at 15 DAI in resistance genotype by COHFBRGA26 and lowest noticed in susceptible genotype at 30 DAI by COHFBRGA38.
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Genome-wide analysis of the gene families of resistance gene analogues in cotton and their response to Verticillium wilt

Genome-wide analysis of the gene families of resistance gene analogues in cotton and their response to Verticillium wilt

Gossypium raimondii is a Verticillium wilt-resistant cotton species whose genome encodes numerous disease resistance genes that play important roles in the defence against pathogens.

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Báo cáo khoa học: "Molecular diversity of Cotton leaf curl Gezira virus isolates and their satellite DNAs associated with okra leaf curl disease in Burkina Faso" docx

BÁO CÁO KHOA HỌC MOLECULAR DIVERSITY OF COTTON LEAF CURL GEZIRA VIRUS ISOLATES AND THEIR SATELLITE DNAS ASSOCIATED WITH OKRA LEAF CURL DISEASE IN BURKINA FASO DOCX

alphasatellite isolates contain a single ORF in the virion sense and a predicted hairpin structure with the loop sequence CAGTATTAC.
Further to the sequence description of the viral iso- lates, we were interested in their possible recombinant origin. Three distinct recombination events (a, b and c) were detected within the full genome sequences of CLCuGV isolates (Figure 4), using a large sequence alignment of geminiviruses [41]. The presence or absence of these recombination events has identified four genetic groups of viruses (G1 to G4; Figures 1 and 4). Recombination event b present in all CLCuGV iso- lates involves a major parent being related to the HoLCrV described in north Africa (Egypt; [9]) and a minor parent related to ToLCDiaV described in the south-west Indian Ocean Islands (Madagascar; [41]). Compared to events a and c based on intra-strain recombination, event b seems to be more ancient. The recombination events a and c specific to isolates G1, G3 and G4 have been characterized in Burkina Faso and in Niger and appear to represent a specific geographic sig- nature. The distribution of the recombination break- points observed here confirm the existence of recombination hot spots over the intergenic region (IR) and the centre of C1 ORF (Figure 4) as described by Lefeuvre et al. [41]. The recombination event c of
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Abscission of fruiting structures in BT and non-BT cotton in relation to abiotic factors and agronomic intervention under rainfed condition

Abscission of fruiting structures in BT and non-BT cotton in relation to abiotic factors and agronomic intervention under rainfed condition

A two year field experiment was conducted to elucidate relation of abscission of fruiting structures in cotton (Gossypium hirsutum) with abiotic factors and effect of agronomic intervention viz., spacing (90 × 60 cm and 90 × 45 cm) and NPK levels (50:25:25, 62.5:31.25:31.25 and 75:37.5:37.5 kg NPK ha-1 ) on abscission of fruiting structures, leaf reddening and chlorophyll content in Bt and non-Bt cotton of same genotype, following split plot design with 4 replicates at Akola. Abscission of fruiting structures increased linearly with increase in morning relative humidity and number of rainy days in a week. However, relations with minimum temperature, evening relative humidity and rainfall were non linear and varied according to their range. Minimum temperature range of 20-22 °C, evening relative humidity beyond 52% and rainfall more than 60 mm in a week were most critical for abscission. Bt cotton lost more fruiting structures through abscission, recorded maximum leaf reddening, but gave higher seed cotton yield. Whereas, non-Bt recorded maximum chlorophyll content. Spacing of 90 x 45 cm compensated abscission losses and recorded higher seed cotton yield than 90 x 60 cm. Application of 75:37.5:37.5 kg NPK ha-1 recorded higher seed cotton yield by minimizing abscission and leaf reddening with improvement in chlorophyll content but was at par with 62.5:31.25:31.25 kg NPK ha-1. Thus, it can be conclude that to harness higher seed cotton yield under rainfed condition Bt cotton should be sown at 90 x 45 cm spacing and fertilized with 62.5:31.25:31.25 kg NPK ha-1 .
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Identification of resistant sources for blast and rust in foxtail millet incited by Pyricularia Setariae and Uromyces Setariae-Italica

Identification of resistant sources for blast and rust in foxtail millet incited by Pyricularia Setariae and Uromyces Setariae-Italica

The present investigation was undertaken to identify the resistant genotypes amongst twelve genotypes of foxtail millet or Italian (Setaria italica L.) for evaluating blast and rust disease severity caused by Pyricularia setariae Nisikado. and Uromyces setariae-italica (Diet.) Yoshino. were studied during 2016-2017 at Centre of Excellence in Millets, Athiyandal, Tamil Nadu, India and this paper reports the result of this investigation. Blast disease caused by Pyricularia setariae and rust disease caused by Uromyces setariaeitalica is a serious disease of foxtail millet and inflicts considerable reduction in grain yield. The disease has characteristic lesions and in severe cases, completely drying up of lesions. Among the twelve genotypes screened against blast and rust diseases, maximum grade of disease severity was recorded in SiA 3163 (4 and 7.67 grade respectively) and the minimum percentage of disease severity was recorded in SiA 3164 (1.00 and 0.67 grade respectively). Among the twelve genotypes, SiA 3205 and SiA 3164 were evaluated as resistant genotypes. These genotypes could be considered a potential source for disease resistance against the blast and rust of foxtail millet and could be used in breeding program for development of blast and rust resistant foxtail millet variety.
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Genetic variability studies for yield, yield attributing and fibre quality traits in cotton (Gossypium hirsutum L.)

Genetic variability studies for yield, yield attributing and fibre quality traits in cotton (Gossypium hirsutum L.)

The study was conducted during kharif, 2018 at experimental block of Agricultural College, Bheemarayanagudi to evaluate twenty upland cotton genotypes for 15 characters in a Randomized Complete Block Design. Analysis of variance revealed significant differences for all traits revealing a high degree of variability among the genotypes. Number of monopodia per plant, sympodial length at fifty per cent of plant height and number of bolls per plant showed high GCV and PCV. While upper half mean length, fibre strength, ginning outturn and micronaire showed comparatively low GCV and PCV.

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CONFIRMATION OF GUS (UIDA) AND CRY1AC GENE TRANSFORMATION IN COTTON (GOSSYPIUM HIRUSUTUM L.) CULTIVARS BY GUS HISTOCHEMICAL ASSAY AND PCR ANALYSIS

CONFIRMATION OF GUS (UIDA) AND CRY1AC GENE TRANSFORMATION IN COTTON (GOSSYPIUM HIRUSUTUM L.) CULTIVARS BY GUS HISTOCHEMICAL ASSAY AND PCR ANALYSIS

The purpose of this study was to develop an efficient protocol for genotype independent gene transformation in cotton (Gossypium hirusutum) a worldwide commercially important fibre crop, to reduce the adverse impact of harmful chemicals used to control biotic stress. Most cotton varieties remain recalcitrant and amenable to genetic manipulation to protocols so far developed.

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PROGRESSION OF COTTON LEAF CURL DISEASE AND ITS VECTOR WHITEFLY UNDER WEATHER INFLUENCES

PROGRESSION OF COTTON LEAF CURL DISEASE AND ITS VECTOR WHITEFLY UNDER WEATHER INFLUENCES

This is because the incidence and spread of a single virus disease may be dependent on several vectors which have complicated ecologies themselves (Bos, 1986). Whitefly (Bamasia tabaci) transmitted cotton leaf curl virus disease was the major problem in cotton cultivation (Sharma et al., 2006). However, weather has a very crucial role in CLCuD spread and development and also affects its vector whitefly’s ecology.

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GENETIC VARIABILITY AND HERITABILITY STUDY IN F2 POPULATION OF GOSSYPIUM BARBADENSE L. COTTON FOR YIELD AND ITS COMPONENTS

GENETIC VARIABILITY AND HERITABILITY STUDY IN F2 POPULATION OF GOSSYPIUM BARBADENSE L. COTTON FOR YIELD AND ITS COMPONENTS

The success of most crop improvement programs depends upon the genetic variability and heritability of desirable traits. The genetic variability and heritability study was carried out in F2 population of Suvin X BCS 23-18-7 cross, at College of Agriculture, UAS Darwad during Kharif 2016-17.

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Construction of a high-density genetic map by specific locus amplified fragment sequencing (SLAF-seq) and its application to Quantitative Trait Loci (QTL) analysis for boll weight in upland

Construction of a high-density genetic map by specific locus amplified fragment sequencing (SLAF-seq) and its application to Quantitative Trait Loci (QTL) analysis for boll weight in upland

Upland Cotton (Gossypium hirsutum) is one of the most important worldwide crops it provides natural high-quality fiber for the industrial production and everyday use. Next-generation sequencing is a powerful method to identify single nucleotide polymorphism markers

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