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disease resistance

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Working with farmers to control sweet potato virus disease in East Africa

Sweet potato virus diseases (SPVD) are an important biotic constraint to sweet potato production in parts […]

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Use of selection with recurrent backcrossing and QTL mapping to identify loci contributing to southern leaf blight resistance in a highly resistant maize line

B73 is a historically important maize line with excellent yield potential but high susceptibility to the […]

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Transcriptional profiling of indica rice cultivar IET8585 (Ajaya) infected with bacterial leaf blight pathogen Xanthomonas oryzae pv oryzae

An indica rice cultivar IET8585 (Ajaya) resists diverse races of the Xanthomonas oryzae pv oryzae pathogen […]

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The Genetic Architecture of Disease Resistance in Maize: A Synthesis of Published Studies

Fifty publications on the mapping of maize disease resistance loci were synthesized. These papers reported the […]

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The effect of reduced phytoalexin production on the resistance of upland cotton to verticillium and fusarium wilts

The effect on disease development of inhibiting the production of the sesquiterpenoid phytoalexin hemigossypol (HG) in […]

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The development of management strategies for maize streak virus disease

The project completed the validation of a system whereby farmers were provided with knowledge of how […]

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Sweet success in Uganda

This highlight report is associated with projects R6617 and R7492.

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Susceptibility to ergot in Zimbabwe of sorghums that remained uninfected in their native climate in Ethiopia and Rwanda

Forty-four local Ethiopian and Rwandan sorghums (Sorghum bicolor) were observed to remain free of ergot, or […]

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Stopping the rot

Outputs from CPP cassava projects based in southern Tanzania (R6614, R7563) have been adopted by agricultural […]

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SSR-based diversity in elite pigeonpea genotypes for developing mapping populations to map resistance to Fusarium wilt and sterility mosaic disease

In order to maximize polymorphism in the mapping populations for mapping loci for Fusarium wilt (FW) […]

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SSR analysis of F1, intra specific crosses of cassava for the identification of new sources of CMD resistance in African germplasm.

Results of work on resistance to cassava mosaic disease in Africa are summarized.

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Sources of resistance to Pseudomonas syringae pv. phaseolicola races in Phaseolus vulgaris

One thousand and forty-eight Phaseolus bean accessions were evaluated for resistance to six races of Pseudomonas […]

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Solutions to a mite(y) problem

Pigeonpea is an extremely important drought-tolerant legume grown by smallholder farmers in marginal farming systems in […]

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Skin test to detect resistance of cattle to Rhipicephalus appendiculatus ticks

The evaluation of a skin test to detect acquired resistance to Rhipicephalus appendiculatus Neumann ticks is […]

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Selection Mapping of Loci for Quantitative Disease Resistance in a Diverse Maize Population

The selection response of a complex maize population improved primarily for quantitative disease resistance to northern […]

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Science and partnership take the punch out offinger millet blast. Validated RNRRS Output.

This is one of 280 summaries describing key outputs from the projects run by DFID’s 10-year […]

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Root exudates associated with resistance in four varieties of chickpeas (Cicer arietinum) to two races of Fusarium wilt. (Fusarium oxysporum f.sp ciceri).

The germination of race 1 spores of Fusarium oxysporum f. sp. ciceri was significantly inhibited by […]

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Rice Germin-Like Proteins: Allelic Diversity and Relationships to Early Stress Responses

Germin-like protein (GLP) markers were associated with quantitative trait loci (QTL) for resistance to the rice […]

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Response of dorper and red Maasai lambs to trickle Haemonchus contortus infections

Six-month-old red Maasai lambs were more resistant than Dorper lambs to repeated infections at one to […]

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Resistance of four sheep breeds to natural and subsequent artificial Haemonchus contortus infection

The response of Red Maasai sheep to natural and artificial Haemonchus contortus infections was compared with […]

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Recurrent Selection Mapping in Two Maize Populations Suggests that Some Common Loci are Associated with Northern Leaf Blight Selection.

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Recessive bacterial leaf blight resistance in rice: Complexity, challenges and strategy

Physical mapping and map-based cloning strategies are routinely used for identification of candidate genes for major […]

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Promotion of control measures for cassava brown streak disease. Final Technical Report.

The purpose of the project was to promote the adoption of CBSD-tolerant varieties developed in earlier […]

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Precise mapping of quantitative trait loci for resistance to southern leaf blight, caused by Cochliobolus heterostrophus race O, and flowering time using advanced intercross maize lines

The intermated B73 x Mo17 (IBM) population, an advanced intercross recombinant inbred line population derived from […]

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Poor farmers in Uganda boost their income with new groundnut varieties – Validated RNRRS Output

Farmers throughout Uganda are using new disease-resistant groundnut varieties—validated in on-farm trials—to overcome a rosette disease, […]

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Phytoalexin accumulation in the roots of chickpea (Cicer arietinum L.) seedlings associated with resistance to fusarium wilt (Fusarium oxysporum f.sp.ciceri)

Four cultivars of chickpea which differed in their reaction to Fusarium oxysporum f.sp.ciceri, the pathogen causing […]

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Phenolic compounds and resistance of yam (Dioscorea alata) to anthracnose caused by Colletotrichum gloeosporoides

Leaves of yam (Dioscorea alata) cv. White Lisbon are highly susceptible to infection by the anthracnose […]

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Pests and poverty: the continuing need for crop protection research

The UK Department for International Development’s White Paper and Strategies for Achieving the International Development Targets1 […]

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Partnering with farmers in cassava-breeding paysdividends – Validated RNRRS Output.

This is one of 280 summaries describing key outputs from the projects run by DFID’s 10-year […]

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Participatory breeding of superior, mosaic disease-resistant cassava: enhancing uptake

This report presents findings from a research project on improving farmers’ access to a diversity of […]

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Multivariate analysis of maize disease resistances suggests a pleiotropic genetic basis and implicates a GST gene

Plants are attacked by pathogens representing diverse taxonomic groups, such that genes providing multiple disease resistance […]

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Modulation of natural resistance of avocado fruits to Colletotrichum gloeosporioides by carbon dioxide treatment

The level of the antifungal compound, 1-acetoxy-2-hydroxy-4-oxo-heneicosa-12,15-diene, in the peel of avocado fruits decreased during ripening. […]

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Marker-Assisted Introgression of resistance to Cassava Mosaic Disease into Latin American Germplasm for the Genetic Improvement of Cassava in Africa.

The gene pools for breeding cassava (Manihot esculenta Crantz) in Africa currently contain only a fraction […]

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Mapping the d1 and d2 Dwarfing Genes and the Purple Foliage Color Locus P in Pearl Millet

The d1 and d2 dwarfing genes and the P purple foliage color gene were placed on […]

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Mapping and Genetic Dissection of Loci Conditioning Disease Resistance in Maize

The primary emphasis of this study is to identify and characterize QTLs for resistance to northern […]

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In the Eye of the Beholder: The Effect of Rater Variability and Different Rating Scales on QTL Mapping

The agronomic importance of developing durably resistant cultivars has led to substantial research in the field […]

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Improved access to appropriate farm inputs for integrated maize crop management by small-scale farmers in Kenya and Tanzania – Final Technical Report

The overall project purpose was to increase yields of small farmers through the development and implementation […]

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Identification of Quantitative Trait Loci for Resistance to Southern Leaf Blight and Days to Anthesis in Two Maize Recombinant Inbred Line Populations

The genetic architecture underlying resistance in maize to southern leaf blight (SLB) caused by Cochliobolus heterostrophus […]

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Identification of Quantitative Trait Loci for Resistance to Southern Leaf Blight and Days to Anthesis in a Maize Recombinant Inbred Line Population

A recombinant inbred line population derived from a cross between the maize lines NC300 (resistant) and […]

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Identification of markers associated with bacterial blight resistance loci in cowpea [Vigna unguiculata (L.) Walp.]

Cowpea bacterial blight (CoBB), caused by Xanthomonas axonopodis pv. vignicola (Xav), is a worldwide major disease […]

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Identification of candidate genome regions controlling disease resistance in Arachis

Background: Worldwide, diseases are important reducers of peanut (Arachis hypogaea) yield. Sources of resistance against many […]

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Identification and Characterization of Regions of the Rice Genome Associated With Broad-Spectrum, Quantitative Disease Resistance

Much research has been devoted to understanding the biology of plant-pathogen interactions. The extensive genetic analysis […]

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Identification and Analysis of Maize QTL for Southern Leaf Blight and Gray Leaf Spot resistance

Working with the foliar diseases Gray Leaf Spot (GLS) and Southern Leaf Blight (SLB), the author […]

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Heterogeneity in the recognition of Ostertagia circumcincta antigens by serum antibody from mature, infected sheep

The recognition of parasite molecules from third-stage and adult Ostertagia circumcincta by serum antibody was studied […]

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Groundnut rosette disease management. Final Technical Report.

This project has helped to lay the foundations for further crop improvement by developing hybrid groundnut […]

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Ground(nut rosette) breaking research

Groundnut is one of the most profitable crops to produce in the Teso system of eastern […]

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Genome-wide nested association mapping of quantitative resistance to northern leaf blight in maize

Quantitative resistance to plant pathogens, controlled by multiple loci of small effect, is important for food […]

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Genetic resistance to parasitic disease: particularly of resistance in ruminants to gastrointestinal nematodes

There is substantial variation among individuals in susceptibility to a wide variety of parasitic diseases and […]

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Genetic mapping of the bean golden yellow mosaic geminivirus resistance gene bgm-1 and linkage with potyvirus resistance in common bean (Phaseolus vulgaris L.)

Bean golden yellow mosaic virus (BGYMV) is a whitefly-transmitted geminivirus of the Begomovirus family that causes important yield losses […]

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Genetic Gains from 30 Years of Cassava Breeding in Nigeria for Storage Root Yield and Disease Resistance in Elite Cassava Genotypes.

Cassava (Manihot esculenta Crantz) is crucial for both food security and poverty alleviation in Sub-Saharan Africa […]

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Full of beans: The Phaseolus thematic cluster

The common bean (Phaseolus vulgaris L.) makes an important contribution to food security, providing as much […]

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Groundnut Rosette Disease Epidemiology

The project’s purpose was to improve the productivity of smallholder, groundnut production in sub-Saharan Africa through […]

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Farmer-led multiplication of rosette resistant groundnut varieties for Eastern Uganda

Groundnut is a key crop in Eastern Uganda, grown for food and income. However, production has […]

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Factors determining recovery and reversion in mosaic disease in African cassava mosaic virus resistant cassava

The severity and persistence of symptoms of mosaic virus disease were monitored during the first six […]

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Expression of avrPphB, an Avirulence Gene from Pseudomonas syringae pv. phaseolicola, and the Delivery of Signals Causing the Hypersensitive Reaction in Bean

Protein production encoded by the avirulence gene avrPphB from Pseudomonas syringae pv. phaseolicola was examined. Incorporation […]

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Evaluation of cassava interspecific hybrids for resistance to pests and diseases indifferent environments of Brazil

Cassava interspecific hybrids were evaluated for pest and disease resistance in different environments of Brazil. Experiments […]

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Economic impact analysis of marker-assisted breeding for resistance to pests and post-harvest deterioration in cassava

Marker-assisted breeding could have a major impact on relieving productivity constraints that cannot as easily or […]

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Disease management factors influencing yield and quality of sorghum and groundnut crop residues.

Crop residues from groundnut and sorghum constitute important fodder resources for dairy production and fodder trading […]

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Comparative analysis of peanut NBS-LRR gene clusters suggests evolutionary innovation among duplicated domains and erosion of gene microsynteny

Plant genomes contain numerous disease resistance genes (R genes) that play roles in defense against pathogens. […]

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Community-based breeding of superior, mosaic disease-resistant cassava in Ghana

Cassava is grown throughout sub-Saharan Africa and increasingly is the main starch staple, particularly in West […]

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Common bean breeding for resistance against biotic and abiotic stresses: From classical to MAS breeding

Breeding for resistance to biotic and abiotic stresses of global importance in common bean is reviewed […]

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Communities reap the benefits from new, improved cassava varieties – Validated RNRRS Output.

This is one of 280 summaries describing key outputs from the projects run by DFID’s 10-year […]

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Chickpea profits not chicken feed

Until recently the chickpea harvests in Nepal were in decline. However, smallholder production is now being […]

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Class I and Class II Major Histocompatibility Complex Alleles are associated with faecal egg counts following natural, predominantly Ostertagia Cicumcinta infection

During a previous investigation an association was found between major histocompatibility complex (MHC)-DRB1 alleles and faecal […]

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Class I and Class II Major Histocompatibility Complex alleles are associated with faecal egg counts following natural, predominantly Ostertagia circumcincta infection

During a previous investigation an association was found between major histocompatibility complex (MHC)-DRB1 alleles and faecal […]

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Characterisation of the causal virus of pigeonpea sterility mosaic disease: a step towards attaining sustainability of pigeonpea production in the Indian subcontinent

This project was undertaken to characterise Pigeonpea sterility mosaic virus (PPSMV) – the agent of PSMD, […]

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Cassava pick ‘n’ mix

Fufu and other traditional foods prepared from cassava provide the staple carbohydrate food of Ghanaians. With […]

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Bringing back bananas

Although Uganda is the world’s second-largest producer of bananas, productivity has declined markedly over the last […]

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Breeding better groundnut for Sub-Saharan Africa – Validated RNRRS Output

This is one of 280 summaries describing key outputs from the projects run by DFID’s 10-year […]

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Better beans

Whitefly-transmitted diseases of crops such as cassava, sweet potato, beans, and vegetables are a serious problem […]

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Beating tungro virus disease in rice – Validated RNRRS Output

This is one of 280 summaries describing key outputs from the projects run by DFID’s 10-year […]

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Bean root rot disease management in Uganda

Project R8478 sought to underpin promotion of sustainable control of bean root rots through resistant varieties […]

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Assessment and comparison of AFLP and SSR based molecular genetic diversity in Indian isolates of Ascochyta rabiei, a causal agent of Ascochyta blight in chickpea (Cicer arietinum L.)

Ascochyta blight (AB), caused by Ascochyta rabiei (Pass.) Labr. (anamorph), is the most damaging disease of […]

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Analysis and modelling of the temporal spread of African cassava mosaic virus and implications for disease control

This paper reports the main conclusions of a series of experiments concluded at Adiopodoume in the […]

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An ovine major histocompatibility complex DRBI allele is associated with low faecal egg counts following natural, predominantly Ostertagia circumcincta infection

Infection with Ostertagia circumcincta is a major constraint on sheep production in temperate areas of the […]

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A-maize-ing partnerships

Maize is the most important food crop in Kenya, providing on average 44% of peoples’ calorie […]

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A new graft inoculation method for screening for resistance to pigeonpea sterility mosaic virus.

Three graft transmission methods (chip, cleft, and petiole grafting) were evaluated for their efficiency in transmitting […]

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A Germin-Like Protein Gene Family Functions as a Complex Quantitative Trait Locus Conferring Broad-Spectrum Disease Resistance in Rice

Plant disease resistance governed by quantitative trait loci (QTL) is predicted to be effective against a […]

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A billion people stand to benefit from pigeonpeaproduction improvements. Validated RNRRS Output.

This is one of 280 summaries describing key outputs from the projects run by DFID’s 10-year […]

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Maize farmers in East Africa have a new basket of options – Validated RNRRS Output

This is one of 280 summaries describing key outputs from the projects run by DFID’s 10-year […]

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Kale seed multiplication schemes take off inKenya. Validated RNRRS Output

This is one of 280 summaries describing key outputs from the projects run by DFID’s 10-year […]

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