5 edition of Summary of preliminary crop germplasm evaluations for resistance to root-knot nematodes found in the catalog.
Summary of preliminary crop germplasm evaluations for resistance to root-knot nematodes
J. N Sasser
1987 by U.S. Agency for International Development .
Written in English
|The Physical Object|
|Number of Pages||88|
Goals / Objectives Develop higher yielding cultivars and germplasm that can be profitably produced on Mississippi farms with fiber properties that meet the requirements of new yarn spinning technologies and an evolving cotton marketing system. Expand the genetic base of cotton through development of genetically diverse elite germplasm. Discover new genes for nematode resistance and enhance. Screening U.S. peanut germplasm for resistance to peanut smut - Commercial and improved germplasm evaluations for Fusarium wilt, FOV race 1 with root-knot nematodes and race 4. National Cotton Council Beltwide Cotton Conference. p. In Bangladesh root knot may cause up to 27 % loss in fruit yield in brinjal (Bari, ). Among the root-knot nematodes (Meloidogyne incognita (Kofoid and white) Chitwood and Meloidogyne Javanica (Kofoid and white) Chitwood) are considered to be the major nemic pests of the crops (Timm and Ameen, ; Mian, ; Mian and Tsuno, ). Also, where corn is grown in rotation with nematode-susceptible crops (e.g. potato), resistant corn varieties can be beneficial for the entire crop rotation. Commercial lines of corn resistant to root-knot nematodes have been released (3) and corn germplasm with resistance to root lesion nematodes has been discovered.
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Novel resistances, that have broader specificity to root-knot nematodes and are heat-stable, are pursued and identified in the wild tomato germplasm.
Molecular cloning of the Mi-1 locus, based on its map position, has been undertaken and reaches its final by: 5. Towards understanding (a)virulence in root‐knot nematodes The specificity of plant‐pathogen relationships is often governed by the direct or indirect interaction between a single resistance gene in the host plant and a corresponding avirulence gene in the by: Among the parasitic nematodes, root-knot nematodes (RKN) and cyst nema-todes are the most important and wide spread.
Every crop species grown is susceptible to one or more RKN species (Sasser, ). RKN (Meloidogyne spp.) are obligate sedentary endo-parasites and are known to occur across a broad range of climatic by: The root-knot nematode Meloidogyne incognita is a major soil parasite of lentil crops.
Increasing restrictions of chemical nematicides have triggered a growing attention and interest in alternate. methods for managing root-knot nematodes in vegetable crops. Charleston Belle and Carolina Wonder are the only root-knot nematode-resistant bell pepper cultivars available to commercial growers and home gardeners (Eery et al., ).
Both Summary of preliminary crop germplasm evaluations for resistance to root-knot nematodes book these cultivars are homozy-gous for the dominant N gene that controls resistance to M. incognita, M. Summary. Resistance toMeliodogyne chitwoodi races 1 (MC1) and 2 (MC2) andM.
hapla (MH) derived fromSolanum bulbocastanum was introduced into the cultivated potato gene pool through somatic fusion. The initial F 1 hybrids showed resistance to the three by: Plant-parasitic nematodes are the most destructive group of plant pathogens worldwide and are extremely challenging to control.
The recent completion of two root-knot nematode genomes opens the way for a comparative genomics approach to elucidate the success of these parasites. Sequencing revealed that, a diploid Summary of preliminary crop germplasm evaluations for resistance to root-knot nematodes book reproduces by facultative, meiotic parthenogenesis, encodes Cited by: Ambayeba Muimba-Kankolongo, in Food Crop Production by Smallholder Farmers in Southern Africa, Root-Knot Nematodes.
Root-knot nematodes are among major pests of economic importance in tomato production in Southern Africa. They induce galls swellings of about 1– cm in diameter on plant roots and can cause yield losses of about 30% by direct infestation, and indirect.
In a report by Gill and Mcsorley (), root-knot nematode is one of the most damaging groups of plant-parasitic nematodes and these nematodes are pests of almost all major crops.
In addition, Karajeh et al., (), stated that about 5% of the world crop production is Cited by: The standards prescribed by Sasser, Carter and Hartman () have been widely used by nematologists for screening crop germplasm for resistance to root-knot nematodes.
Sasser et al. acknowledged that much work had not been done to relate Gall Index (GJ) to yield loss or actual crop damage. The work reported here attempted to relate GI to yield loss in four varieties of soyabean, Cited by: 7. Many of the most damaging species employ an advanced parasitic strategy in which they induce redifferentiation of root cells to form specialized feeding structures able to support nematode growth and reproduction over several weeks.
Current control measures. He graduated as an agricultural engineer from Ghent University and obtained a PhD at the same University on the spread of plant-parasitic nematodes and their management in hydroponic cropping systems. Within the framework of the Belgian Cooperation, he worked from to as a researcher in crop protection.
Phenotypic screening of 30 tomato germplasm for root-knot nematodes (Meloidogyne incognita) resistance was carried out in pot and field experiments between September and December The field experiment Summary of preliminary crop germplasm evaluations for resistance to root-knot nematodes book conducted on a plot previously cropped with okra (Abelmoschus esculentus) and tomatoes at Afari near Nkawie in the Ashanti region of Ghana while the pot experiment was Author: Y.
Summary of preliminary crop germplasm evaluations for resistance to root-knot nematodes book, K. Osei, R. Akromah. A quantitative technique for evaluating cotton for root-knot nematode resistance. Phytopathology A technique was developed for evaluating cotton (Gossypium spp.) for cultivars, F3 lines, and G.
hirsutum races. These levels could not be detected resistance to the root-knot nematode (Meloidogvne incognita acrita). Resistance evaluation and host status of selected green gram germplasm against Meloidogyne incognita Article in Crop Protection January with Reads How we measure 'reads'.
Foliar Nematodes: A Summary of Biology and Control with a Compilation of Host Range Lisa M. Kohl, USDA-APHIS-PPQ, Center for Plant Health Science and Technology, Plant Epidemiology and Risk Analysis Laboratory, Raleigh, NC Corresponding author: Lisa M.
Kohl. @ Kohl, L. This book provides an overview (chapter 1) of the general biology, ecology and economic importance of root-knot nematodes (Meloidogyne spp.), and covers in detail the following: general morphology (chapter 2); taxonomy, identification and principal species (chapter 3); biochemical and molecular identification (chapter 4); molecular taxonomy and phylogeny (chapter 5); hatch and host location.
The root-knot nematode Meloidogyne graminicola, which is distributed worldwide, is considered a major constraint on rice production in Asia.
The present study used the root gall index and number of nematodes inside the roots to evaluate resistance/susceptibility to M. graminicola in different subpopulations of Oryza sativa (aus, hybrid aus, indica, hybrid indica, temperate japonica, tropical Cited by: 2. Determine inheritance of resistance to Phytophthora fruit rot in watermelon; and develop breeding lines with resistance to Phytophthora fruit rot and watermelon vine decline.
Determine genetic basis of resistance to root-knot nematodes in watermelon, identify molecular markers associated with resistance, and develop resistant breeding lines.
Plant-parasitic nematodes constrain chickpea (Cicer arietinum) production, with annual yield losses estimated to be 14% of total global production.
Nematode species causing significant economic damage in chickpea include root-knot nematodes (Meloidogyne artiella, M. incognita, and M. javanica), cyst nematode (Heterodera ciceri), and root-lesion nematode (Pratylenchus thornei).Cited by: 1. NC is the product of a conventional breeding program designed to improve levels of resistance to the major soil-borne diseases of flue-cured tobacco and at the same time improve yield and quality characteristics.
This new cultivar possesses high resistance to black shank and bacterial wilt, and is resistant to root-knot nematodes. Our preliminary evaluations of this Juglans germplasm collection has revealed resistance to A. tumefaciens and Phytophthora spp.
among the J. hindsii, J. major, J. microcarpa and Pterocarya accessions, and root-lesion nematode resistance in J. cathayensis. Preliminary evaluations of these initial findings provide a foundation for continued examination of Juglans wild relatives to identify novel.
Plant breeders and nematologists have developed improved cultivars of important crop species with resistance to plant-parasitic nematodes. The effectiveness of these breeding efforts has depended on the availability of efficient screening procedures, identification of adequate sources of durable resistance, nature of the nematode feeding habit, and knowledge of the inheritance of by: In preliminary screening, field evaluation of germplasm of mungbean was carried out during the year and in root-knot nematode sick micro plots of New Research Farm of Author: Bansa Singh, Arpita Das, A K Parihar, B Bhagawati, Deepak Singh, K N Pathak, Kusum Dwivedi, Niranjan.
In the absence of a suitable host crop root-knot nematodes are able to survive and reproduce on many weed species commonly found in maize ﬁ elds. How-ever, the main survival strategy of root-knot nematodes during the winter months is to survive in unhatched eggs present in the soil and in plant residue left behind in the ﬁ eld after Size: 1MB.
This study was conducted to evaluate the efficacy of crop rotation and other cultural practices for management of southern root-knot nematodes (RKNs) and lesion nematodes.
Three nonhost crops, a RKN-resistant soybean [Glycine max (L.) Merr.] cultivar, and poultry litter/tillage (Year 1) and fallow (Year 2) were used as summer rotation crops. dwelling nematodes are both good guys and bad guys in crop production. The good nematodes, which don’t get much press, feed on fungi, bacteria, and other creatures that live in the soil and thereby recycle the nutrients contained in it (Figure ).
Tens of millions of mostly beneficial nematodes live in each square meter of crop-File Size: 2MB. Goals / Objectives. 1) To develop cotton germplasm and/or varieties adapted to the soil and climate of Louisiana with improvements in yield and fiber quality. 2) To develop cotton germplasm and/or varieties with resistance to Fusarium wilt and root.
Whitehead AG, The distribution of root-knot nematodes (Meloidogyne spp.) in tropical Africa. Nematologica, Wu JQ, Xue ZH, A preliminary study on the root-knot nematode disease of kenaf. Acta-Phytopathologica Sinica, 16(1) Yamada E, Takakura S, Shoot and pod diseases of cowpea induced by fungi and bacteria.
Nematodes and other soiborne pathogens of cowpea. Characterization of new resistance to root-knot nematodes in cowpea. Advances in research on cowpea striga and alectra.
Variation in virulence of striga gesnerioides on cowpea: new source of crop s: 2. The crop rotation may provide a short-term suppression of nematode population densities (Starr et al., ).
However, due to the polyphagous nature of the pest as well as the relatively low economic value of some recommended rotational crops, control of root-knot nematodes by crop rotation becomes very limited (Waceke et al., ).
It has File Size: KB. Introduction. Root-knot nematodes (RKNs), Meloidogyne spp., are major plant pathogens worldwide. These extremely polyphagous endoparasites can infest more than 5, plant species, including many field and greenhouse crops (Goodey et al., ).Since the banning of most chemical nematicides, due to environmental and public health issues, resistant cultivars have become Cited by: 8.
Root knot nematode control evaluations, and Characteristics of Mi resistance-breaking populations in California. Antoon Ploeg. Department of Nematology.
University of California, Riverside. @ South Sacramento Valley Processing Tomato Production Meeting. Woodland, CA. Janu Plant-parasitic nematodes are the most destructive group of plant pathogens worldwide and are extremely challenging to control.
The recent completion of two root-knot nematode genomes opens the way for a comparative genomics approach to elucidate the success of these parasites. Sequencing revealed that, a diploid that reproduces by facultative, meiotic parthenogenesis, encodes. He has published over 80 refereed scientific papers, overseen the release of five germplasm lines and two cultivars resistant to nematodes, and co-edited two books, Plant Resistance to Parasitic Nematodes () and Plant Nematodes of Agricultural Importance ()/5(4).
Common root knot nematodes: Common root knot nematodes Meloidogyne hapla (northern root-knot nematode) produces tiny galls on a wide variety of plants. Meloidogyne incognita (southern root-knot nematode) produces larger galls and more severe stunting, yellowing and wilting symptoms than M.
hapla. Crop Science Abstract - Resistance in soybean [Glycine max (L.) Merr.] root-knot nematodes is a valuable control measure for reducing losses to this pathogen.
Screening only in the field has the disadvantages of seasonal restrictions and lack of uniformly infested soil. The objective of this study was to develop a simple and reliable.
ABSTRACT. Cowpea (Vigna unguiculata L. Walp) is an affordable source of protein and strategic legume crop for food security in Africa and other developing regions; however, damage from infection by root-knot nematodes (RKN) suppresses cowpea deployment through breeding of resistance gene Rk in cowpea cultivars has provided protection to cowpea growers worldwide for many years.
plants, including most vegetables, fruit crops, field crops, ornamentals, and weeds. The most important species in Illinois are M. hapla and M. incognita, which have the widest host ranges of any of the root-knot nematodes.
Root-knot nematodes damage plants by devitalizing root tips and causing formation of swellings of the roots. • Root-knot nematode infected plants have swellings on the roots and usually are stunted and unproductive. • Root-knot nematode has a very wide host range, and once introduced, it is difficult to control.
• Root-knot nematode is most common in warm, moist, sandy soils. Nematodes move in. resistance to nematodes also can lead to selection of virulent biotypes.
Pdf populations of M. pdf recently have been identified as virulent on tomato with Mi in regions where tomato is a major crop (14,25).
Additional sources of resistance to root-knot nematodes in peanut are needed to develop new cultivars with broad and.Root knot Nematode M anagement Cultural and physical practice s biological organism s host resistance, and nematicide download pdf are traditional tactics used to manage the peanut root knot nematode Crop r otations are one of the most effective cultural management methods For example, rotation of peanut with cotton, velvet bean, or bahiagrass can m.CROP PROTECTION PROGRAMME Characterisation and epidemiology of root rot diseases caused ebook Fusarium and Pythium spp.
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