National Agricultural Research Organisation Institutional Respoitory (NAROIR)

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Recent Submissions

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    Existing and emerging NARO innovations for increased poultry productivity and effeciency
    (National Agricultural Research Organisation, 2026-04-22) Isabirye Robert
    Outline • Problem and Background • Improved Indigenous Chicken Breeding • DINU Hatchery Project • Diatomaceous Earth (DE) Technology • Local Vaccine Production • Aflasafe • Greening the Poultry Value Chain • Acknowledgment
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    The role of red meat in human diet: Uganda’s perspective on Climate-Smart alternative feedstuff
    (National Agricultural Research Organisation, 2026-05-06) Ssemwogerere Farouk
    Do we have a food or nutritional problem in Uganda?
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    Genome-wide association study (GWAS) with high-throughput SNP chip DNA markers identified novel genetic factors for mesocotyl elongation and seedling emergence in rice (Oryza sativa L.) using multiple GAPIT models
    (Frontiers in Genetics, 2023-11-20) Nkulu Rolly Kabange; Alibu Simon; Youngho Kwon; So-Myeong Lee; Ki-Won Oh; Jong-Hee Lee
    This study employed a joint strategy high-density SNP Chip DNA markers and multiple Genome Association and Prediction Integrated Tool (GAPIT) models [(Bayesian-information and Linkage-disequilibrium Iteratively Nested Keyway (BLINK), Fixed and random model Circulating Probability Uniform (FarmCPU), General Linear Model (GLM), and Settlement of Mixed Linear Model (MLM) Under Progressively Exclusive Relationship (SUPER)], to investigate novel genetic factors controlling mesocotyl elongation and seedling emergence for direct-seeded rice. Genotype data (230,526 SNP Chip DNA makers) of 117 doubled haploid lines (derived from a cross between 93–11 (Oryza sativa L. ssp. indica) and Milyang352 (O. sativa L. ssp. japonica) were used to perform a Genome-Wide Association Study (GWAS). Results revealed the association between five (5) topmost significant SNP markers, of which number two [AX-155741269, Chr2: 15422406 bp, and AX-155200917, Chr7: 23814085 bp, explaining 37.5% and 13.8% of the phenotypic variance explained (PVE)] are linked to the mesocotyl elongation loci, while three (AX-282097034 and AX-283652873, Chr9: 9882817 bp and 1023383 bp, PVE 64.5%, and 20.2%, respectively, and AX- 154356231, Chr1: 17413989 bp, PVE 21.1%) are tightly linked to the loci controlling seedling emergence. The qMEL2-1 and qSEM9-1 are identified as major QTLs explaining 37.5% and 64.5% of the PVE for mesocotyl elongation and seedling emergence, respectively. The AX-282097034 (Chr9: 9882817 bp) was co-detected by four GAPIT models (BLINK, FarmCPU, SUPER, and GLM), while AX- 155741269 was co-detected by BLINK and SUPER. Furthermore, a high estimated heritability (Mesocotyl elongation: h2 = 0.955; seedling emergence: h2 = 0.863; shoot length: h2 = 0.707) was observed. Genes harbored by qMEL2-1 and qSEM9-1 have interesting annotated molecular functions that could be investigated through functional studies to uncover their roles during mesocotyl elongation and seedling emergence events in rice. Furthermore, the presence of genes
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    Influence of Seed Development and Maturation on the Physiological and Biochemical Seed Quality
    (IntechOpen, 2024-01-17) Obura Morish; Lamo Jimmy
    Seed quality is one of the widely discussed topics in seed system and seed biology; thus, many countries with functional and vibrant seed system have invested heavily in seed quality assurance and quality control. Good quality seed is crucial for any cropping system, for without it, there is poor field establishment and wastage of other production inputs. Good quality seed responds well to added inputs, ensures uniform crop establishment, and has higher yield advantage to poor quality seed under the same management practice. It is, however, important to note that seed quality is influenced greatly by seed development and maturation. Storage reserves are deposited in seed storage tissues during seed development and maturation, and these reserves are important in the early stages of germination and maintenance of seedling life when it has not yet developed good photosynthetic capacity. The development stage at which the seed is harvested has enormous influence on its performance either in the field or storage, in terms of germination behavior and vigor characteristics, and maintenance of viability. This chapter presents some of the current understandings and findings on seed development and maturation, with emphasis on the physiological and biochemical quality.
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    The Maize Caterpillar Mythimna (= Leucania) loreyi (Duponchel, 1827) (Lepidoptera: Noctuidae): Identification, Distribution, Population Density and Damage in Tunisia
    (Insects, 2023-09-26) Jouda Mediouni Ben Jemâa; Abir Soltani; Tasnim Djebbi; Ines Mejri; Kanyesigye Dalton; Otim Michael Hilary
    Surveys were conducted during 2020 and 2021 to study the emerging lepidopteran pests inflicting cereals in Tunisia, with specific emphasis on maize and sorghum crops. A species was collected from traps placed in the Jendouba, Bizerte, Nabeul and Gabes regions. Thus, this study carried out first report on its identification, distribution, population density and damage. Results showed that M. loreyi was abundant in all prospected areas, with total adult captures reaching 4779 and 9499 moths on sorghum and maize, respectively, during 2020. Moreover, the mean infestation percentage reached its maximum during August at 31.05% and 20.69% for the Jendouba and Bizerte regions, respectively, while the highest infestations were observed in the Gabes and Nabeul regions during July, with respective mean values of 13.54% and 21.35%. In addition, results revealed that the highest pest incidence occurred in the Gabes region, with values of 11.1 ± 0.47 and 5.7 ± 0.48 during 2020 and 2021, respectively. Additionally, results pointed out that M. loreyi achieved two summer generations in the different localities of Tunisia. Overall, this study provides basic insights into the ecology and population biology of M. loreyi, which are required to establish an effective pest control program.