Abstract Foliar diseases are important biotic constraints limiting maize production globally. Most of the maize foliar diseases are managed by means of quantitative partial resistance. Quantitative trait loci QTL conditioning partial-resistance to these pathogens have been identified. Validation of candidate QTL conferring partial resistance would present marker-assisted selection as a potentially viable strategy to improve host resistance.
Key participants in Uganda's formal seed system value chain as at Table 2: Bottlenecks affecting the seed value chain in Uganda Table 3: Materials used in The study Table 4: The phenotypic traits that were collected using visual scoring method Table 5: Summary statistics of the phenotypic traits that showed significant differences Table 6: Longe 6H eigenvalues and cumulative percentage of variation explained by the first four principal components Table 7: Longe 7H eigenvalues and cumulative percentage of variation explained by the first four principal components Table 8: Longe 9H eigenvalues and cumulative percentage of variation explained by the first four principal components Table 9: Longe 10H eigenvalues and cumulative percentage of variation explained by the first four principal components Table Percentage of off-types within the field Table Codes of samples with their districts of origin as appearing in the genetic distance matrix Table Genetic similarity matrix of Longe 7H based on genetic distance Table Genetic similarity matrix of Longe 9H based on genetic distance Table Longe 10H Dendrogram, based on 33 phenotypic traits using Euclidean distance matrix and Average link method Figure 2: Longe 9H Dendrogram, based on 33 phenotypic traits using Euclidean distance matrix and Average link method Figure 3: Longe 6H Dendrogram, based on 33 phenotypic traits using Euclidean distance matrix and Average link method Figure 4: Longe 7H Dendrogram, based on 33 phenotypic traits using Euclidean distance matrix and Average link method Figure 5: Summary statistics of SNPs Appendix 7: In a special way, I wish sincerely to thank my supervisors, Dr.
Sylvester Katuromunda and Dr.
Godfrey Asea, for their support, guidance and constructive criticism which enabled me go through this research. I am greatly indebted to the unquantifiable contribution of Julius Pyton Sserumaga and also to Ssemaze for his technical support. I am very grateful to my family members who have been patient with me, supporting and praying for me during this period of studies.
Last but not least, I am very grateful to many others who are not cited here but who have contributed a lot to this study. To compete favourably in this new global seed world, quality and cost are and will certainly continue to be the key issues.
The presence of counterfeit seed in Uganda seed market has been reported.
Studies need to be conducted to investigate at which level along the seed value chain the deterioration in quality occurs. The current study assessed the change in quality of hybrid maize seed as it is transferred from seed companies when seed has been processed and packaged to agro-dealers.
Specific objectives of the study were to determine the levels of phenotypic and genotypic variation in hybrid maize seed from seed companies and agro- dealers. A total of samples of four hybrid maize varieties improved varieties most favored by farmers used in this study were collected from agro-dealers in 15 districts and from 3 seed companies.A study carried out at the Harare Research Station evaluated eight three-way and four commercial maize hybrids for yield and resistance to Maize streak virus using controlled leaf hopper infestation and Turcicum Leaf Blight under artificial inoculation.
Evaluation of plant extracts, bio-agents and fungicides against Exserohilum turcicum causing Turcicum leaf blight of Maize. Journal of Agricultural Science, 20(3) . The fungal pathogen Setosphaeria turcica causes turcicum or northern leaf blight disease on maize, sorghum and related grasses.
A prevalent foliar disease found worldwide where the two host crops, maize and sorghum are grown. The aim of the present study was to find genes controlling the host.
the course of research and that the thesis entitled "Studies of sorghum leaf blight incited by Exserohilum turcicum (Pass.) sorghum leaf blight incited by Exserohilum turcicum (Pass.) Leo and Suggs." submitted in partial fulfilment of the of metin2sell.comum on 4 2 maize leaf extract agar at different temperatures and days of incubation.
8. Leaf extract of R. serpentine at 10% concentration, has been quite effective in controlling the spot blotch of wheat incited by Bipolaris sorokiniana (Malik et al., ) and maydis leaf blight of maize (ICAR-Indian Institute of Maize Research, ) which encourages the present findings.
With regards to disease control, sarapagandha leaf. Identification of additional source of resistance to E.
turcicum in maize (Zea mays L.). Sabrao Journal of Breeding and Genetics., Nwanosike, M. R. O. ().
Variability, epidemiology and yield loss caused by northern leaf blight of maize in Tanzania. PhD Thesis, Sokoine University of Agriculture, Morogoro, Tanzania.