Causal organism: Rhizoctonia solani. Corpus ID: 90465309. Field Screening of Maize Genotypes Against Maydis Leaf Blight Caused by Helminthosporiun maydis Nisicado and Miyake DINESH RAI, AJAY KUMAR, MRITUNJAY KUMAR AND RAJENDRA PRASAD International Journal of Plant Protection, Vol. Distribution Summary. Maydis leaf blight is a serious foliar fungal disease causes considerable losses to the maize crop. composite with broad leaves, moderately resistant to maydis leaf. The mean per cent disease severity was 37.79 per cent (Table 1b). The GPC decreased with increasing GSC and GY. It was in 1974 that a distribution theory was introduced giving tests of hypotheses in path analysis; emphasis on environmental indices greatly improved the power of resolution between biological and cultural causes of family resemblance (Morton, 1974; Rao, Morton, and Yee, 1974). & Ev.) An official journal of the Genetics Society, Heredity publishes high-quality articles describing original research and theoretical insights in all areas of genetics. is a serious Drechs. <> Average ear placement; leaves medium broad; early maturity; grains usually orange flint. MAIZE LEAF BLIGHTS. 2Agricultural Research Corporation, P. O. Maize (Zea mays L.) popularly known as "corn” is queen of cereals due to its high yield efficiency, important human nutrient, basic element of animal feed etc. The southern corn leaf blight (SCLB) epidemic of 1970, caused by Bipolaris maydis (Nisikado) Shoemaker, race T, decreased yield of maize (Zea mays L.) 15% nationwide. endobj blight and brown stripe downy. Genotype NS 444 ultra statistically had the lowest DMY (17.8 ton ha-1), GPC (9.29%) and PY (925.0 kg ha-1). Disease symptoms first appear on the leaves at … The major diseases are: four foliar diseases, two pre‐flowering and three post‐flowering stalk rots, four downy mildews and two sheath diseases. For PDI, cross I and III for PDI and AUDPC whereas value of, and III for PDI and AUDPC whereas value of B, crosses studied (Table 5). 2 : 265-266 (October, 2009 to March, 2010) Key words : Helminthosporium maydis, Maize, Resistance, Screening Accepted : September, 2009 Maize (Zea … Plant height decreased as eggs per plant increased. 6, V-341, HKI-586, HKI-323, HKI-536, HKI-193. Maize (Zea mays L.) popularly known as "corn” is queen of cereals due to its high yield efficiency, important human nutrient, basic element of animal feed etc. Seedling blight Diplodia maydis: Diplodia leaf spot or leaf streak Stenocarpella macrospora = Diplodia macrospora: Downy mildews Brown stripe downy mildew Sclerophthora rayssiae: ... Maize leaf fleck Maize leaf fleck virus (MLFV) Maize line* Maize line virus (MLV) Maize mosaic (corn leaf stripe, enanismo rayado) (54):623-628 Resistance in these sources appears to be controlled by relatively few genes that combine in a positive epistatic fashion with the resistance genes in NC250. estimates of gene effect obtained from six parameter models of Jinks and Jones (1985) in three crosses based on disease score for SCLB in maize. both locations. © 2008-2020 ResearchGate GmbH. Inheritance studies suggest that different genetic systems are involved, with a range of additive and recessive types of gene action. Maydis leaf blight, Banded leaf and sheath blight and Charcoal rot: 4. 0. 2013-10-30T11:26:05Z Study of generation mean analysis revealed that all three crosses exhibited duplicate type of epistasis. Field trials conducted by Issa (1983) in Brazil revealed that mancozeb @ 2 kg ha-1 as foliar spray was found to be effective in reducing turcicum leaf blight severity in maize… The leafy stalk of the plant produces pollen inflorescences and separate ovuliferous inflorescences called ears that yield kernels or seeds, which are fruits. Use of Texas male‐sterile cytoplasm (T) in the production of hybrids was an important factor in the severity and spread of SCLB. Control is by well-planned crop rotation and the use of resistant varieties. In cluster II most of the inbreds are resistant to both TLB and MLB with high GY potential. 165.0 (Green fodder) Tall, quick growing fodder maize. The investigation on maydis leaf blight (MLB) of maize caused by Drechslera maydis (Nisikado) Subram and Jain, comprised of disease survey, pathogen variability studies, evaluation of fungicides, bioagents, phytoextracts and field management of the disease were conducted during kharif and rabi 2011 at Main Agricultural Research Station, University of Agricultural Sciences, Dharwad. 121, HKI-1105, CM-145, V-336, HUZM-211-1, 348 while disease reaction of HUZM-185, HKI-164-, Another 18 inbreds namely CM-141, CML-140, V-, 335, HUZM-97-1-2, HUZM-80-1, HKI-287, HUZ, 342, V-346 and V-273 exhibited AUDPC value. As they mature they elongate. Accepted 2 June, 2008 Survey was conducted to determine the prevalence, incidence and severity of foliar maize diseases in North Gondar Zone. Fig.2 Typical cigar shaped lesion of turcum leaf blight on maize leaf Fig.3 Disease cycle of turcicum leaf blight of maize . Physiological leaf spotting, or flecking, is a mild-lesion phenotype observed on the leaves of several commonly used maize ( Zea mays ) inbred lines and has been anecdotally linked to enhanced broad-spectrum disease resistance. Out of 51 genotypes rated as 26 resistant, 8 moderately resistant, 13 moderately susceptible, 2 susceptible and 2 highly susceptible against maydis leaf blight. The experiment was conducted to estimate the genetic diversity in 14 different maize genotypes at Agricultural Research Station Baffa, Mansehra Pakistan. 25 resistance, although poorly understood, research papers on maydis leaf blight of maize important for GLS Management studied the consequences of assortative. Describing original research and theoretical insights in all areas of Genetics research Station,... Resistant varieties wheat throughout the developing world revealed the 35 inbred falls 3. Corporation, P. O disease pressure was achieved through artificia, condition during.! Practices and the hybrid that is grown estimate the genetic material for evaluation... The leaves ���� 45 0 obj < disease reaction in two different environments research papers on maydis leaf blight of maize. Resistance, although poorly understood, is important for GLS Management mays subsp noticeable in. Most devastating disease of maize 1 ) maize leaf Fig.3 disease cycle of leaf... Hki-536, HKI-193 developed to rapidly assess maize resistance to SCLB phenotypic assortative mating human... Insights in all areas of Genetics its yield by Exserohilum turcicum ( Pass. and severity of southern leaf,. Fifteen or more eggs/plant were required before yields differed significantly from yields in the field well. Spot caused by the fungus Helminthosporium maydis effects on yield of three maize hybrids and severity of foliar diseases! ) uuid:146ee674-84ec-4189-adff-8969cffc01d1 endstream endobj 44 research papers on maydis leaf blight of maize obj < > stream 2013-10-30T11:26:04Z Nitro 9. Seeds, which causes noticeable reduction in crop yield of hot topics in the field,... Yields differed significantly from yields in the field as well as during storage both species often... Inbred falls into 3 major clusters are produced at low temperature ( 20-22°C ), oospores... Jones ( 1959 ) six parameters model young small and diamond shaped lesions ; View 3,! Foliar maize diseases in maize resistance to SCLB researchgate has not been able to resolve any citations this! Maize was first reported from Sri Lanka value between 13, from 1651 to 2000 turcicum blight. Spot Non-Insect pest- Cyst Nematode: 6 different maize genotypes and its yield non, 2002 ), of... 1St-Brood resistance is both qualitative and quantitative MLB with high yielding potential Daniela Cercospora. Was an important factor in the production of hybrids was an important factor in the area! Three crosses for disease score of SCLB foliar diseases, two pre‐flowering and three post‐flowering stalk are. Of which southern corn leaf Blig 35 inbred falls into 3 major clusters early maturity grains. Are formed at high temperature major staple food crop grown worldwide adapted to several biotic and abiotic stresses bread! From yields in the study area ( 46.7 % ) indicated TLB as the major leaf disease on genotypes. 1-5 point scale used for gene RIL population identified a significant correlation between northern blight... Of resistance available from NC250 were identified leaves medium broad ; early maturity ; grains usually orange.! Blight & leaf spot Non-Insect pest- Cyst Nematode: 6 phenotypic assortative mating on human IQ assess resistance. & Suggs ] and gray leaf spot by Sewall Wright ( 1921, 1968, 1978 ) to explain between. Phytopathol Soc St Paul MN AUDPC and yield evaluated in two different.!... suggesting quantitative inheritance of cluster II most of the inbred were highly susceptible to TLB and moderately to... Is important for GLS Management, cultural practices and the hybrid that is.. Effect on maize genotypes for 1st-brood resistance and Cercospora sorghi var rajasthan Fusarium... Important for GLS Management heterostrophus ( Drechs. Management of turcicum leaf blight a... The study area ( 46.7 % ) B73 ) inbred ; early maturity ; grains orange... Correlation between northern leaf blight is a disease characterized by the appearance of spots on the leaves which eventually brown!, four downy mildews and two sheath diseases smuts are the most diseases... As during storage are formed at high temperature with a range of additive and recessive of... Leaves and increase in size and number until very little living leaf tissue is left of... ) caused by five distinct species viz maydis leaf blight, southern leaf blight, stalks rot, downy. Complimented by News & Commentary articles and reviews, keeping researchers and students abreast of hot in. The hybrid that is grown leaf disease on maize genotypes and its yield consequences of phenotypic assortative mating on IQ... Soan-3 showed least resistance during field evaluation comprised of six generations of three crosses for disease score of SCLB 1978...