Stalk rot disease was found in all the surveyed areas showing 100% prevalence. Overall, 22 % of the grains were infected with Fusarium and 16 different species were identified. Post Flowering Stalk Rot Complex of Maize - Present Status and Future Prospects Isolates MN207144, MN200604, MN200605, and MN200606 were found highly aggressive. Though the GCA × environment interaction was significant for MSR, this study identified lines and their cross combinations with high resistance and large GCA and SCA effects across environments for FSR and MSR This offers scope for source population improvement for resistance to these stalk rots, as well as developing maize hybrids with stable resistance to Post flowering stalk rot. In each district three sampling sites were selected. : Allgemeine, landwirtschaftliche und technische Mikrobiologie, By clicking accept or continuing to use the site, you agree to the terms outlined in our. A B Figure 3. ResearchGate has not been able to resolve any citations for this publication. Tropical and, grain sorghum in queensland and new south wales, aus, distribution, molecular identification an. The scaling tests and joint scaling tests indicated the inadequacy … 2006, and 2007 growing seasons, with a total This fungus is an aggressive pathogen of corn and is one of the few stalk rot pathogens that frequently causes disease prior to senescence. Bacterial stalk rot of maize caused by Dickeya zeae previously known as E. chrysanthemi pv. Resulting dendrogram from TEF1-α profile showed that the genotypes were divided into clusters I, II and III of which cluster III contained only F. redolens as the first report from Iran. In this study, Fusarium spp. Likewise, disease severity index (DSI) was recorded on the basis of plant area infected or damaged. A total of 523 isolates were collected from northern New South Wales, southern Queensland, and central Queensland. CM202 was a resistant line to FSR disease while P12 was highly susceptible. The translation elongation 1-α (TEF1) gene of the isolates was sequenced, and a phylogenetic tree constructed with maximum likelihood (ML) and Bayesian interference (BI) inferred. Semantic Scholar is a free, AI-powered research tool for scientific literature, based at the Allen Institute for AI. The Baker ratio, which shows the relative importance of GCA over SCA, was close to unity for both the stalk rots, and hence a predominant additive gene effect was inferred towards resistance to these diseases. Based on line evaluation trials, resistant and susceptible lines were selected and crossed following a Diallel mating design IV to study the gene action for resistance to these stalk rots and the estimating the combining ability of inbred lines. The bacterium prefers high temperature and moisture for their growth result is plant toppled down within week. The Baker ratio, which shows the relative importance of GCA over SCA, was close to unity for both the stalk rots, and hence a predominant additive gene effect was inferred towards resistance to these diseases. We investigated the genetic diversity and pathogenicity of 40 FGSC isolates obtained from stalk and ear rot samples collected from 42 locations in northeastern China during 2013 and 2014. It is a complex disease caused by multiple pathogens, among which Fusarium moniliforme and Macrophomina phaseolina are the major ones that cause severe yield losses in the Asian tropics. In the present study, natural contamination of maize and wheat samples from main cultivation areas of Iran by Fusarium species belonging to the G. fujikuroi species complex was evaluated with special attention to the ability of the isolates to produce Fumonisin B1 (FB1 ). © 2008-2020 ResearchGate GmbH. All figure content in this area was uploaded by Muhammad Riaz, All content in this area was uploaded by Muhammad Riaz on Jan 01, 2020, DISTRIBUTION OF STALK ROT OF MAIZE IN PUNJAB, PAKISTAN, Institute of Agricultural Sciences, University of the Punja, for year 2016-17 was 1334 thousand hectares, extensive survey to document the distribution of stalk, Disease severity index was calculated by applying following for. Post flowering stalk rot (PFSR) is one of the major biotic constraints to maize production in tropical and subtropical environments. Host range: D. zeae bacteria have a wide host range. were collected from maize roots, stems and kernels for phylogenetic analysis and the F. verticillioides isolates were subjected to pathogenic and toxigenic comparison. Bacterial stalk rot can cause a mushy rot early in the growing season. Result is plant toppled down within week potential risk of mycotoxin contamination of F. temperatum infected or damaged,. 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