Genetics of Cercospora Leaf Spot Resistance in Mungbean [Vigna radiata (L.) Wilczek] through Generation Mean Analysis

2021 ◽  
Author(s):  
Priyanka Choudhary ◽  
Ramesh Chand ◽  
Anil Kumar Singh
Keyword(s):  
Latent Period ◽  
Leaf Spot ◽  
Vigna Radiata ◽  
Generation Mean Analysis ◽  
Cercospora Leaf Spot ◽  
Progress Curve ◽  
High Heritability ◽  
Efficient Breeding ◽  
Important Disease ◽  
Selection Of

Background: Cercospora leaf spot (CLS) is a fungal disease of mungbean [Vigna radiata (L.) Wilczek] caused by Cercospora canescens and now emerged as an important biotic stress. A better understanding of the genetics of CLS resistance will help in formulating efficient breeding procedures in mungbean.Methods: The present investigation focused on genetics of CLS resistance through generation mean analysis (six parameter model) in two intra-specific mungbean crosses namely, Kopergaon × HUM12 and Kopergaon × ML1720. Four quantitative disease resistance components, viz., Area under disease progress curve (AUDPC), Incubation period (IP), Latent period (LP) and degree of sporulation (SP) were studied.Result: A high correlation of AUDPC with latent period (r = –0.68 to –0.79, P less than 0.0001) and SP (r = 0.72 to -0.81, P less than 0.0001) advocated that both are main contributor for CLS disease development. High heterosis along with high heritability in terms of AUDPC ( greater than 0.09) indicated the importance of genetic factor(s) in controlling CLS resistance. Generation mean analysis of both the crosses revealed duplicate epistatic interaction and involvement of two genes for CLS resistance in terms of AUDPC. This study supports oligogenic nature of inheritance, advocating AUDPC along with IP, LP and SP as important disease indicator for selection of CLS resistance in mungbean.

Inheritance of Cercospora Leaf Spot Resistance in Mung Bean, Vigna radiata (L.) Wilczek

1988 ◽  
Vol 100 (3) ◽  
pp. 228-229 ◽  
Author(s):  
S. P. Mishra ◽  
A. N. Asthana ◽  
Lallan Yadav
Keyword(s):  
Leaf Spot ◽  
Vigna Radiata ◽  
Mung Bean ◽  
Cercospora Leaf Spot

Quantitative trait loci mapping of Cercospora leaf spot resistance in mungbean, Vigna radiata (L.) Wilczek

2010 ◽  
Vol 28 (2) ◽  
pp. 255-264 ◽  
Author(s):  
Sompong Chankaew ◽  
Prakit Somta ◽  
Worawit Sorajjapinun ◽  
Peerasak Srinives
Keyword(s):  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Leaf Spot ◽  
Vigna Radiata ◽  
Quantitative Trait Loci Mapping ◽  
Cercospora Leaf Spot ◽  
Trait Loci

scholarly journals SELECTION OF COFFEE PROGENIES WITH LARGE BEANS RESISTANT TO RUST AND CERCOSPORA LEAF SPOT

2019 ◽  
Vol 14 (1) ◽  
pp. 67
Author(s):  
Fernanda Aparecida Castro Pereira ◽  
Samuel Pereira de Carvalho ◽  
Mariana Thereza Rodrigues Viana ◽  
Douglas Alves Vidal ◽  
Guilherme Souza Ferreira ◽  
...  
Keyword(s):  
Leaf Spot ◽  
Mixed Model ◽  
Statistical Approach ◽  
Plant Size ◽  
Cercospora Leaf Spot ◽  
Future Studies ◽  
Mixed Model Approach ◽  
Potential Use ◽  
Selection Of ◽  
Model Approach

<p>Rust is the main disease of coffee. Recently, cercospora leaf spot has grown in importance, intensifying defoliation and decreasing grain yield. The aim of this study was to use a mixed model approach to select the best progenies of "Big Coffee VL" for resistance to rust and cercospora leaf spot. We used 12 progenies with high bean yields. Based on bean size, leaves and plant size, plants within each progeny were classified as "small" (P), "medium" (M) and "large" (G). The experimental design was completely randomized, with six replicates and one plant per plot. Six measurements were carried out every 15 days for each plant by selecting 20 fully exposed leaves with higher and lower sun exposures. The measurements summarized disease severity using two diagrammatic scales to obtain the area of the leaf under rust or Cercospora leaf spot. A mixed model approach was used to calculate genotypic value (GV) and heritability estimates. The Mulamba and Mock index was used to select the most resistant progenies, in which the sum of rankings was weighted by a heritability value. Five progenies were selected; three progenies were G (G17, G9, and G12), one progeny was M (M5) and another progeny P (P23). Among these, M5 and P23 progenies are the most productive and may have potential use in future studies. The statistical approach used to predict promising genotypes facilitates the selection of genetically superior individuals for maximizing yields.</p>

scholarly journals Validation of molecular markers linked to Cercospora leaf spot disease resistance in mungbean (Vigna radiata [L.] Wilczek)

2021 ◽  
Vol 53 (4) ◽  
pp. 749-757
Author(s):  
P. Papan ◽  
W. Chueakhunthod ◽  
O. Poolsawat ◽  
K. Arsakit ◽  
A. Tharapreuksapong ◽  
...  
Keyword(s):  
Resistance Gene ◽  
Ssr Markers ◽  
Leaf Spot ◽  
Vigna Radiata ◽  
Interval Mapping ◽  
Genetic Distances ◽  
Indel Marker ◽  
Leaf Spot Disease ◽  
Cercospora Leaf Spot ◽  
Phenotypic Data

Cercospora leaf spot (CLS) resistance is a highly desirable trait for mungbean (Vigna radiata [L.] Wilczek) production in Thailand. ‘V4718’ is a vital resistance source that shows high and stable resistance to CLS disease. A previous study identified a major quantitative trait locus (QTL) (qCLSC72V18-1) controlling CLS resistance and found the marker (I16274) that was located closest to the resistance gene by using F2:9 and F2:10 recombinant inbred line populations derived through a cross between ‘V4718’ and the susceptible variety ‘Chai Nat 72’ (‘CN72’). Here, we evaluated three newly reported simple sequence repeat (SSR) markers and one InDel marker together with six previously identified markers that were linked to qCLSC72V18-1 to further identify the markers that were located close to this QTL. By performing bulk segregant analysis on two validation populations, we found that two SSR markers (Vr6gCLS037 and Vr6gCLS133) and one InDel marker (VrTAF5_indel) were putatively associated with CLS resistance. Of these markers, only the VrTAF5_indel marker showed a significant association with the CLS resistance gene with a logarithm of odds score > 3 across the phenotypic data for 2016 and 2018. QTL analysis with inclusive composite interval mapping revealed that the VrTAF5_indel marker was integrated into the genetic map with other previously identified markers. The I16274 and VrTAF5_indel markers flanking the QTL of interest accounted for 41.56%-60.38% of the phenotypic variation with genetic distances of 4.0 and 5.0 cM from the resistance gene, respectively. Both markers together permitted only 0.40% recombination with the CLS resistance gene in marker-assisted selection and thus could be useful in future breeding efforts for CLS resistance in mungbean.

scholarly journals Association and inter-relationship among yield and yield contributing characters and screening against Cercospora leaf spot in mung bean (Vigna radiata L.)

2013 ◽  
Vol 8 (41) ◽  
pp. 2008-2014
Author(s):  
Ahmad Aijaz ◽  
M Razvi S ◽  
A Rather M ◽  
Gulzafar ◽  
A Dar M ◽  
...  
Keyword(s):  
Leaf Spot ◽  
Vigna Radiata ◽  
Mung Bean ◽  
Cercospora Leaf Spot

scholarly journals Improving the Cercospora Leaf Spot Management Model for Sugar Beet in Minnesota and North Dakota

Plant Disease ◽  
2007 ◽  
Vol 91 (9) ◽  
pp. 1105-1108 ◽  
Author(s):  
J. Khan ◽  
L. E. del Río ◽  
R. Nelson ◽  
M. F. R. Khan
Keyword(s):  
Sugar Beet ◽  
North Dakota ◽  
Disease Severity ◽  
Leaf Spot ◽  
Management Model ◽  
Initial Symptom ◽  
Cercospora Leaf Spot ◽  
Progress Curve ◽  
Management Recommendations ◽  
The Impact

Management of Cercospora leaf spot, caused by Cercospora beticola, is necessary for the economic production of sugar beet (Beta vulgaris). The objectives of this study were to evaluate the impact of two relative humidity thresholds (87 and 90%) on the daily infection values (DIVs) used to determine when fungicide applications were required, to determine whether current Cercospora management recommendations for northern areas of Minnesota and North Dakota could be used by growers in the southern areas of these states, and to compare the utility of calendar-based fungicide applications with the Cercospora management model. Research was conducted in Breckenridge, MN and St. Thomas, ND in 2003 and 2004. Fungicide applications significantly (P = 0.05) reduced maximum disease severity (ymax) and area under the disease progress curve (AUDPC) when compared with the nontreated control at both locations during 2003 and 2004. Fungicides applied according to DIVs calculated at RH ≥ 87% or RH > 90% gave similar results. The mandatory second fungicide application 14 days after the first application for southern areas did not significantly decrease disease severity or AUDPC, or improve root yield or recoverable sucrose compared with treatments without the mandatory application. This research illustrates that a DIV calculated at RH ≥ 87% would result in similar timing of fungicide applications compared with DIVs calculated at RH > 90%. The results further show that the recommendation of fungicide applications at initial symptom and subsequent applications based on DIV and disease severity should be used for both northern and southern growers. Finally, this research showed that fungicide applications based on the Cercospora management model provided similar, effective disease control with fewer fungicide applications compared with calendar-based applications.

scholarly journals Scoring Cercospora Leaf Spot on Sugar Beet: Comparison of UGV and UAV Phenotyping Systems

2020 ◽  
Vol 2020 ◽  
pp. 1-18 ◽  
Author(s):  
S. Jay ◽  
A. Comar ◽  
R. Benicio ◽  
J. Beauvois ◽  
D. Dutartre ◽  
...  
Keyword(s):  
Sugar Beet ◽  
Leaf Spot ◽  
Spot Size ◽  
Unmanned Ground Vehicle ◽  
Cercospora Leaf Spot ◽  
Ground Vehicle ◽  
Aerial Vehicle ◽  
High Throughput Phenotyping ◽  
Selection Of ◽  
Genotype Sensitivity

Selection of sugar beet (Beta vulgaris L.) cultivars that are resistant to Cercospora Leaf Spot (CLS) disease is critical to increase yield. Such selection requires an automatic, fast, and objective method to assess CLS severity on thousands of cultivars in the field. For this purpose, we compare the use of submillimeter scale RGB imagery acquired from an Unmanned Ground Vehicle (UGV) under active illumination and centimeter scale multispectral imagery acquired from an Unmanned Aerial Vehicle (UAV) under passive illumination. Several variables are extracted from the images (spot density and spot size for UGV, green fraction for UGV and UAV) and related to visual scores assessed by an expert. Results show that spot density and green fraction are critical variables to assess low and high CLS severities, respectively, which emphasizes the importance of having submillimeter images to early detect CLS in field conditions. Genotype sensitivity to CLS can then be accurately retrieved based on time integrals of UGV- and UAV-derived scores. While UGV shows the best estimation performance, UAV can show accurate estimates of cultivar sensitivity if the data are properly acquired. Advantages and limitations of UGV, UAV, and visual scoring methods are finally discussed in the perspective of high-throughput phenotyping.

scholarly journals Susceptibility of Crapemyrtle Cultivars to Powdery Mildew and Cercospora Leaf Spot in Alabama

1998 ◽  
Vol 16 (3) ◽  
pp. 143-147
Author(s):  
A. K. Hagan ◽  
G. J. Keever ◽  
C. H. Gilliam ◽  
J. D. Williams ◽  
G. Creech
Keyword(s):  
Powdery Mildew ◽  
Leaf Spot ◽  
Near East ◽  
Cercospora Leaf Spot ◽  
Evaluation Period ◽  
Resistant Cultivars ◽  
Residential Landscapes ◽  
Selection Of

Abstract Reaction of 43 cultivars in three crapemyrtle taxa (Lagerstroemia indica, L. indica x fauriei and L. fauriei) to powdery mildew (Erysiphe lagerstroemia) and Cercospora leaf spot (Cercospora lythracearum) was evaluated for three years in a simulated landscape planting in Auburn, AL. Overall, the incidence of powdery mildew was lower on L. indica x fauriei and L. fauriei than on L. indica. In two of three years, Cercospora leaf spot severity was similar among all cultivars of L. indica and L. indica x fauriei, while the single selection of L. fauriei ‘Fantasy’ proved highly resistant to this disease. Selected cultivars in each crapemyrtle taxa were resistant to one or both diseases. Over the three-year evaluation period, hybrid cultivars ‘Tuscarora’, ‘Tuskegee’, and ‘Tonto’, as well as L. fauriei ‘Fantasy’ were largely free of powdery mildew and suffered little damage from Cercospora leaf spot. Cultivars suffering light injury to the foliage along with little noticeable defoliation from either disease were L. indica x fauriei ‘Basham's Party Pink’, ‘Apalachee’, ‘Caddo’ as well as L. indica ‘Cherokee’ and ‘Glendora White’. Lagerstroemia indica ‘Carolina Beauty’, ‘Wonderful White’, ‘Raspberry Sundae’, ‘Powhatan’, ‘Peppermint Lace’, ‘Majestic Beauty’, and ‘Orbin Adkins’ were susceptible to both powdery mildew and Cercospora leaf spot. The mildew-resistant cultivars ‘Acoma’, ‘Near East’, ‘Yuma’, ‘Souix’, ‘Hopi’, and ‘Comanche’ suffered extensive spotting of the leaves, which extended well into the mid-canopy, along with heavy leaf shed due to Cercospora leaf spot. Cultivars which are susceptible to one or both diseases would be poor choices in low maintenance commercial or residential landscapes.

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