ABSTRACT An experiment was conducted to determine the effectiveness of potassium in mitigating drought stress and improving yield in lowland rice ecosystems at Sokoine University of Agriculture Morogoro Tanzania. The main plot constituted three soil moisture levels viz. flooding, 20 and 40 kPa soil moisture tensions. Subplot factor constituted three lowland rice varieties viz. SARO, NERICA4 and SUPA while potassium levels were 0,50 and 100 kg K ha-1 for field experiment and 0, 25 and 50 mg K...
EXTENDED ABSTRACT Cassava roots represent the future of food and income generation for over 800 million people in the world however, its production is threatened by virus disease; Cassava brown streak disease (CBSD). Biotechnology approaches are fast and powerful methodologies in cassava improvement and breeding. Construction of high-density and high quality genetic map in cassava would be of great benefit in combating CBSD. Conventional study was conducted in Naliendele, Kibaha and Dodoma f...
ABSTRACT This study was carried out to evaluate the genetic diversity of rice germplasms collected from Eastern and Southern Africa countries (Burundi, Kenya, Malawi, Tanzania including Zanzibar and Rwanda) based on morphological, molecular and quality traits for utilization in breeding programmes. A total of 191 rice germplasms were characterized in this study. Twenty four qualitative and quantitative morphological traits, eight grain quality traits and 18 Simple Sequence Repeat (SSR) marke...
ABSTRACT This study was carried out to assess the performance of advanced common bean lines (BC2F6) to diseases (Angular leaf spot, Common bean blight and Bean common mosaic virus/Bean common mosaic necrosis virus) and yield and yield components in three different locations; Arusha, Mbeya and Morogoro. The experiment was arranged in split plot, main plots were locations (Arusha, Morogoro and Mbeya) and sub-plots were 32 genotypes (28 lines and 4 checks). The results from the experiment revea...
ABSTRACT The screen house and field experiments were conducted during the 2017 /2018 rainy season in order to characterize grain yield and root architecture of fifteen(15) selected Faya rice genotypes namely; Faya 14 M 69, Faya Zambia, Faya Mafuta 1, Faya Mafuta 2, Faya Makanjira, Acc 5934, Mw 1685, Acc 9290, Acc 9293, Acc 18037, Acc 18028, Acc 17323, Acc 17344, Acc 5933, and Faya Kalonga, at both molecular and morphological levels for further utilization in crop breeding programmes. The fif...
ABSTRACT Seed health testing to detect seed-borne pathogens is an important step in the management of crop diseases. Laboratory and screen house experiments were carried out at Selian Agriculture Research Institute Arusha, to investigate the extent of seed-borne fungal pathogen problems from farmers saved seeds in Northern wheat growing Zone. A total of 45 untreated seed samples of wheat were collected from farmers saved seeds in Karatu, Hanang and Siha Districts. Each sample was physically i...
ABSTRACT Studies on spatial and temporal distribution of white coffee stem borer (WCSB), antestia bug and coffee berry borer (CBB) were carried out between September 2007 and August 2008 in medium altitude (Lyamungo) and high altitude (Kilema) areas in Kilimanjaro region. Specifically, the study aimed at establishing the species composition and spatial distribution, the temporal variation in abundance, and the relative importance of three pests in coffee ecosystems. A multistage random ...
ABSTRACT Rice yellow mottle virus (RYMV) endemic to Africa is spread within and between rice fields by several species of Chrysomelid beetles and grasshoppers. In Tanzania and particularly in Kilombero District, the virus is increasingly becoming a serious problem to rice production. The relationships between the insect vectors and RYMV disease incidence and severity were not fully known hence the need for this study. The assessment of both disease incidence and severity of RYMV and populati...
EXTENDED ABSTRACT One hundred maize genotypes of different categories were evaluated for Maize Lethal Necrosis Disease (MLND) resistance in three locations under natural infestation. Sixty inbred lines, thirty landraces and ten improved varieties were subjected to disease hot spot areas. Experiment was conducted at Ngaramtoni in Arusha municipality, Mlangarini in Arumeru District and Kiru six in Babati Rural Distriduring 2014 and 2015 seasons. The trial was laid down in Randomized Incomplete...
ABSTRACT A study was conducted to establish the effect of intercropping patterns using improved maize and common bean varieties recommended for low attitude areas (Morogoro) on soil fertility, growth and yield. The experiment was conducted in the Crop Museum at the main campus of Sokoine University of Agriculture in Morogoro, Tanzania. The site is located between latitude 06o 50‟S and longitude 37o 39‟E at 526 meter above sea level. The experiment was laid out in a randomized complete bl...
ABSTRACT Surveys were conducted to assess the incidence of seed borne pathogens on fingermillet (Eleusine coracana (L.) Gaetrn) and sunflower (Helianthus annus L.) in seeds produced by farmers in Morogoro Rural, Kilosa districts (Morogoro Region), Kondoa, Dodoma Rural districts (Dodoma Region), and Njombe and Iringa Rural districts (Iringa Region), in Tanzania. A total of 72 seed samples were collected and taken to the laboratory for assay of seed-borne pathogens. The blotter method was used...
ABSTRACT Three experiments were conducted at Ukiriguru, Misungwi District, Nansole and Bukindo in Ukerewe district with the aim of investigating genotypic and phenotypic variation, interrelationship and magnitude of Genotype x Environment interactions and stability parameters for rice grain yield and yield components and other agronomic characters in lowland rice genotypes. The experiments, using Randomized Complete Block Design were conducted during 2012 main rain season. Fifteen genotypes...
ABSTRACT Rice, (Oryza sativa) accounts for more than 50% of the staples consumed in Zanzibar. However, only 20% of the annual demand is produced whereas the remaining 80% being imported. Adoption of improved varieties and better soil management practices may increase rice productivity. An experiment was conducted at Mchangamdogo village, Wete district, during the 2012 rice-growing season to test newly released high fertilizer responsive NERICA varieties and different fertilizers rates that ca...
ABSTRACT Bean bruchids are the devastating pests of common bean which causes huge losses during storage. Two landraces Kalubungula and KK25 were identified to be resistant to bruchid infestation and damage but the mechanism and genetics of resistance were unknown. The aim of this study was to (i) characterize the storage protein related to resistance in these landraces (ii) determine genomic region and map QTL’s related to resistance (iii) phenotype progenies response to bean bruchid infest...
ABSTRACT A field experiment was conducted during the 2010/2011 cropping season in four locations of the Southern Highlands of Tanzania viz. Inyala, Mbimba, Uyole and Seatondale. The main objective of the study was to assess the response of selected maize genotypes across different growing environments for yield and adaptability and their interaction on yield and yield components whereas the specific objectives were to evaluate stability variables, interrelations and genetic parameters for tra...