Bananas In Uganda Research Articles

The potential of agroforestry to buffer climate change impacts on suitability of coffee and banana in Uganda

Coffee, an important global commodity, is threatened by climate change. Agroforestry has been considered as one option to maintain or enhance coffee production. In this study, we use a machine learning ensemble consisting of MaxEnt, Random Forest and Boosted Regression Trees to assess climate change impacts on the suitability to grow Arabica coffee, Robusta coffee and bananas in Uganda by 2050. Based on this, the buffering potential of Cordia africana and Ficus natalensis, the two commonly used shading trees in agroforestry systems is assessed. Our robust models (AUC of 0.7–0.9) indicate temperature-related variables as relevant for Arabica coffee suitability, while precipitation-related variables determine Robusta coffee and banana suitability. Under current climatic conditions, only a quarter of the total land area is suitable for growing Arabica coffee, while over three-quarters are suitable for Robusta coffee and bananas. Our results suggest that climate change will reduce the area suitable to grow Arabica coffee, Robusta coffee and bananas by 20%, 9% and 3.5%, respectively, under SSP3-RCP7.0 by 2050. A shift in areas suitable for Arabica coffee to highlands might occur, leading to potential encroachment on protected areas. In our model, implementing agroforestry with up to 50% shading could partially offset suitable area losses for Robusta coffee—but not for Arabica coffee. The potential to produce valuable Arabica coffee thus decreases under climate change and cannot be averted by agroforestry. We conclude that the implementation and design of agroforestry must be based on species, elevation, and regional climate projections to avoid maladaptation.

Optimizing postharvest management of bananas in Uganda: a resilience and engineering-based approach

This study delves into the intricacies of postharvest management in banana production in Uganda, aiming to uncover insights that can enhance resilience and capitalize on opportunities for the sustained growth of banana cultivation. The examination spans the entire postharvest process, encompassing harvesting, handling, transportation, and storage up to the market stage. By identifying the primary causes of postharvest losses and understanding the associated challenges, this research outlines best practices to pave the way for a more robust banana production system, benefiting farmers and contributing to broader agricultural sustainability goals. The investigation explores the core issues affecting millions of lives and endeavors to catalyze transformative change by adapting to challenges and leveraging innovative engineering opportunities. The overarching objective is to ensure food security and elevate the economic well-being of smallholder farmers in Uganda. Recommendations emanating from this research are directed at stakeholders, urging them to scrutinize and reevaluate policies and regulations of banana postharvest management. The intention is to foster an enabling environment conducive to innovation, sustainability, and equitable development in the banana production sector.

Why Gender Matters in Breeding: Lessons from Cooking Bananas in Uganda

This study examined the gender-differentiated trait preferences of cooking banana (matooke) for farmers and consumers in Central Uganda to inform banana-breeding strategies. Women and men banana farmers might have differing production objectives, norms, and values which drive decisions on which varieties to adopt and grow. However, breeders rarely consider this in their variety development programs, leading to lost opportunities for equitable breeding. An exploratory sequential mixed-method approach was used to obtain a richer understanding of the trait preferences of women and men, which explains the acceptability of cooking bananas. Consumer preference tests for the candidate banana varieties and released hybrids were also conducted. The results showed that the universal attributes for variety selection were bunch size, taste, resistance to pests and diseases, drought tolerance, food texture/softness, maturity period, and finger size. Men appreciated agronomic and market-related traits, such as tolerance to drought and poor soils, bunch size and compactness, maturity period, and shelf life, while women valued processing and cooking traits such as flavour, food colour, ease of peeling, finger size, and agronomic traits such as plant height. These are plausible attributes for the gender-responsive breeding of bananas. The findings highlight the need to redesign the banana-breeding pipeline and process in Uganda to deliver varieties with attributes desired by women and men along this commodity value chain. A participatory demand-driven and gender-responsive process involving stepwise selection criteria that commences with quality traits followed by production traits while integrating gender-specific preferences should be employed to ensure the acceptability of cooking banana hybrids by women and men end users. This requires integrating different disciplines, including social scientists and gender experts, along the entire breeding process for more inclusive products and equitable outcomes.

Opportunities for Orphan Crops: Expected Economic Benefits From Biotechnology.

An enabling, evidence-based decision-making framework is critical to support agricultural biotechnology innovation, and to ensure farmers’ access to genetically modified (GM) crops, including orphan crop varieties. A key element, and often a challenge in the decision-making process, involves the balancing of identified potential risks with expected economic benefits from GM crops. The latter is particularly challenging in the case of orphan crops, for which solid economic data is scarce. To address this challenge, the International Food Policy Research Institute (IFPRI) in collaboration with local economists analyzed the expected economic benefits to farmers and consumers from the adoption of GM crops in 5 sub-Saharan African countries. This paper focuses on case studies involving insect-resistant cowpea in Nigeria and Ghana; disease-resistant cassava in Uganda and Tanzania; and disease-resistant banana in Uganda. Estimations from these case studies show substantial economic benefits to farmers and consumers from the timely adoption and planting in farmers’ fields of GM orphan crops. Our analysis also shows how the benefits would significantly be reduced by regulatory or other delays that affect the timely release of these crops. These findings underscore the importance of having an enabling policy environment and regulatory system—covering, among other elements, biosafety and food/feed safety assessment, and varietal release registration—that is efficient, predictable, and transparent to ensure that the projected economic benefits are delivered and realized in a timely manner.

Farmers' Receptiveness to Genetically Modified Bananas in Uganda:

ウガンダでは，主食用のバナナが盛んに栽培・利用されているが，2000年代より病虫害による深刻な生産減に陥っている。政府はその対策として，遺伝子組み換え（GM）バナナの開発と，一般での栽培に向けた法整備を進めている。本論文ではウガンダのGMバナナをめぐって，その開発・普及にかかわる先行研究を整理するとともに，農民の品種選択の側面に注目することで，新たな論点を提示して検討した。

Anticipating farmer outcomes of three genetically modified staple crops in sub-Saharan Africa: Insights from farming systems research

Conventional ex-ante evaluations rely on a mix of economic, environmental, and social indicators to assess the potential impacts of Genetically Modified (GM) crops prior to their commercial release. While these predictive studies have produced useful knowledge, they have also consistently overestimated the ex-post outcomes of GM crops for African smallholder farmers. Yet these same assessment methods remain the dominant approach to project farmer outcomes for a new suite of soon-to-be commercialized GM staple crops. The research presented in this paper offers a different evaluative approach for these new GM crops by taking inspiration from farming systems research (FSR). We use the conceptual starting point of FSR scholarship—the farming system—to conduct an exploratory predictive analysis of three GM crops currently in the experimental pipeline: Water Efficient Maize for Africa (WEMA) in Kenya, disease-resistant matooke banana in Uganda, and Bt cowpea in Burkina Faso. Our findings suggest that the lofty projected benefits of these crops are unlikely to be realized by many, if not most, smallholder farmers due to incongruences with the farming systems they are designed to benefit. This research demonstrates the importance of using farming system-based evaluation methods to better anticipate likely farm-level outcomes of new breeding technologies.

Socio-Economic Factors and their Influence in Adoption of Agricultural Technologies Under Subsistence Economy; A Case of Tissue Culture Banana in Uganda

Uptake of improved agricultural technologies like banana tissue culture still remains low despite the efforts that have been put in place to enhance its adoption. A survey was carried out on 115 smallholder farmers in central Uganda to establish the influence of various socio-economic factors on the adoption of tissue culture banana between January and July 2018. Findings from the study revealed that respondents’ main occupation (P = 0.028), market accessibility (P = 0.006) and proximity to the source of planting materials (P = 0.000) were the major drivers to adoption of tissue culture banana. The study thus recommended the establishment of regional distribution centres for tissue culture banana plantlets, increased investment in extension in order to strengthen the farmer-researcher linkage and increased market access.

A review of varietal change in roots, tubers and bananas: consumer preferences and other drivers of adoption and implications for breeding.

This review of the literature on varietal change in sub-Saharan Africa looks in detail at adoption of new varieties of bananas in Uganda, cassava in Nigeria, potato in Kenya, sweetpotato in Uganda and yams in Côte d'Ivoire. The review explored three hypotheses about drivers of varietal change. There was a strong confirmation for the hypothesis that insufficient priority given to consumer-preferred traits by breeding programmes contributes to the limited uptake of modern varieties (MVs) and low varietal turnover. Lack of evidence meant the second hypothesis of insufficient attention to understanding and responding to gender differences in consumer preferences for quality and post-harvest traits was unresolved. The evidence on the third hypothesis about the informal seed system contributing to slow uptake of MVs was mixed. In some cases, the informal system has contributed to rapid uptake of MVs, but often it appears to be a barrier with inconsistent varietal naming a major challenge.

Distribution of Pseudocercospora species causing Sigatoka leaf diseases of banana in Uganda and Tanzania.

Sigatoka leaf diseases are a major constraint to banana production. A survey was conducted in Tanzania and Uganda to assess the distribution of Pseudocercospora species and severity of Sigatoka leaf diseases. Pseudocercospora species were identified using species-specific primers. Sigatoka-like leaf diseases were observed in all farms and on all cultivars, but disease severity varied significantly (P < 0.001) between countries, districts/regions within countries, altitudinal ranges and banana cultivars. In all regions except Kilimanjaro, P. fijiensis, the causal agent of black Sigatoka, was the only pathogen associated with Sigatoka disease. Mycosphaerella musae was associated with Sigatoka-like symptoms in Kilimanjaro region. Black Sigatoka disease was more severe in Uganda, with a mean disease severity index (DSI) of 37.5%, than in Tanzania (DSI = 19.9%). In Uganda, black Sigatoka disease was equally severe in Luwero district (mean DSI = 40.4%) and Mbarara district (mean DSI = 37.9%). In Tanzania, black Sigatoka was most severe in Kagera region (mean DSI = 29.2%) and least in Mbeya region (mean DSI = 11.5%). Pseudocercospora fijiensis, the most devastating sigatoka pathogen, was detected at altitudes of up to 1877 m a.s.l. This range expansion of P. fijiensis, previously confined to altitudes lower than 1350 m a.s.l. in East Africa, is of concern, especially for smallholder banana farmers growing the susceptible East African Highland bananas (EAHB). Among the banana varieties sampled, the EAHB, FHIA hybrids and Mchare were the most susceptible. Here, the loss of resistance in Yangambi KM5, a banana variety previously resistant to P. fijiensis, is reported for the first time.

Health as growth

What notions of health and proper nutrition are articulated in the use and promotion of agricultural biotechnology in the global South? What future trajectories for health do they envision? Experiments with genetically modified bananas in Uganda use the fruit as a vehicle to achieve public health goals. This work in plant science understands itself as humanitarian, drawing on specific notions of health and its opposite: the deficient health of humans and plants. Instead of thinking about improved health through bananas, which implies an instrumental relationship to plants, I connect this high-tech effort to a way of thinking with the banana plant in central Uganda that highlights the entanglement of human and plant growth. Expanding our thinking about health with plants and the gardens where they grow relocates the production of health to sites that still seldom figure in medical anthropology and helps reconceptualize what one takes growth to be and what relations can sustain cross-species thriving.

Evaluation of banana germplasm and genetic analysis of an F1 population for resistance to Fusarium oxysporum f. sp. cubense race 1

Fusarium wilt of bananas (Musa spp.), caused by Fusarium oxysporum f. sp. cubense (Foc) causes up to 100% yield loss in bananas. Foc race 1 in particular is very devastating to dessert bananas in Uganda. One of the effective control strategies for the disease is the development of resistant cultivars through breeding. The objectives of this study were to identify suitable banana germplasm for generating a segregating population for resistance to Foc race 1 and understand the mode of inheritance of resistance to Foc race 1. Twenty-two banana accessions sourced from the National Agricultural Research Organisation in Uganda were challenged with Foc race 1 in a screen house experiment. Monyet, resistant to Foc race 1 and Kokopo, susceptible, were selected and crossed to generate 142 F1 genotypes. These F1 genotypes were also challenged with Foc race 1 in a screen house experiment. Data were collected on rhizome discoloration index (RDI), leaf symptom index (LSI) and pseudo-stem splitting (PSS), and analysed for variability. The banana accessions evaluated showed varying degrees of resistance to Foc race 1. Segregation ratios for resistant versus susceptible progenies fitted 13:3 (χ2 = 0.12, P = 0.73) for RDI and 11:5 (χ2 = 3.04, P = 0.08) for PSS. Estimated broad sense heritability was 27.8% for RDI, 13.9% for LSI and 14.7% for PSS. The results suggest that resistance to Foc race 1 in banana is controlled by at least two dominant genes with epistatic interaction and that heritability of resistance to Foc race 1 is low in Musa spp.

Agro-Related Policy Awareness and Their Influence in Adoption of New Agricultural Technologies; A Case of Tissue Culture Banana in Uganda

Adoption of banana tissue culture in Uganda still remains low despite the availability of policies geared to enhancing agriculture. A survey was carried out on 115 smallholder farmers in Central Uganda to establish the influence of agro-related policies in tissue culture banana adoption between January and July 2018. Results from the study indicated that 83.8% of the respondents were aware about the Plan for Modernization of Agriculture policy as compared to National Agricultural Policy (5.5%), National Development Plan (13.12%) and Agricultural Sector Development Strategy and Investment Plan (3.3%). Age, gender and education level all exhibited weak correlations in relation to policy awareness while generally, the study found out that awareness of the of the policies did not significantly influence farmer’s adoption of tissue culture banana in central Uganda (P&gt;0.05). We conclude that most of the agro-related polices were on paper and minimal efforts were in place to enhance their awareness amongst small holder farmers. We therefore recommend that increased awareness of agro-related policies to the farmers as well as integration of farmer interests in policy formulation are paramount in order to achieve wide uptake of agro-technologies like banana tissue culture.

Food insecurity as a supply chain problem. Evidence and lessons from the production and supply of bananas in Uganda

Abstract Despite agriculture being the main economic activity in Uganda, increasing food prices within the country point to the growing challenge of food insecurity. In 2016, food shortage was reported in some parts of Uganda (mainly in Karamoja sub-region and parts of Serere) and government resorted to temporary relief distribution of food from other regions of the country. The acute food shortage in one part of the country while another part, a few hundred kilometers away, has excess farm output calls into question the efficiency of the supply chain of some agro-commodities. This research attempts to examine the challenges faced in the production and supply of bananas in Uganda and how the supply chain perspective can help us address these challenges better. We juxtapose the supply chain approach against the value chain perspective and argue that the supply chain perspective offers a much deeper understanding of market-based challenges, which affect livelihoods of smallholders who often sell their products at rock-bottom prices. A cross sectional survey of various banana production and consumptions points in Uganda was conducted. The findings show that losses in the supply chain accounted for about 29% of banana production – a figure slightly lower than that 40% previously reported in the literature. In addition, the farmers did not benefit from increased food prices due to inadequate market information at their disposal despite banana value chains having recently received significant development attention. We also found that infrastructural bottlenecks and limited collaboration and coordination among smallholders heavily affected the supply of bananas in the country. This is arguably a key factor that strongly explains the food insecurity problem in Uganda. We conclude that the findings point to a different problem, which is that of a dysfunctional supply chain structure of bananas from the rural areas to urban centres in Kampala.

Morphotypes, distribution and uses of false banana in Uganda

Enset ( Ensete ventricosum ) is commonly known as the “false banana” because of its close resemblance to the domesticated banana (Musa spp.) plant. It is Ethiopia’s most important traditional staple crop in the densely populated south and south-western parts of the country; where it is grown and exploited for its starch to make various food and industrial products. In Uganda, little is known about enset regarding its ethno-botany and distribution, yet it occurs in the country. The objective of this study was to map out the distribution and document the ethno-botany and uses of enset in Uganda. A survey was carried out throughout the country to identify its natural habitats in different regions. Local people were interviewed on the uses of enset, etymology, and identification of different morphotypes. Morphological descriptors and sex of enset accessions were used in classification or identification of morphotypes. Enset was generally widely, but sparsely distributed in the different regions in Uganda; growing at elevations ranging between 988 (Moyo district) to 2,150 (Kapchorwa district) metres above sea level (masl) and in a variety of habitats. Out of the 80 districts of Uganda (as of 2009), enset was reported and observed in 30 districts. Thirteen local names of enset and their meanings were documented; but it was widely referred to as Kitembe. Different plant parts were used for medicinal purposes; while the leaves were used in local beer brewing. There were five enset morphotypes distinguished by morphological traits, such as plant height (short vs tall), mid-rib colour (light green vs pink), pseudostem background appearance (light green vs brown), leaf margin colour, male bud colour, and leaf length-breadth ratio. A detailed molecular level genetic diversity assessment is recommended for further validation of the morphotypes. Key words: Ensete ventricosum , ethno-botany, etymology, morphotypes

Limits to biofortification: farmer perspectives on a vitamin A enriched Banana in Uganda

ABSTRACTBiofortifying staple crops with enhanced nutritional content has been touted as a means of addressing micronutrient deficiency and has emerged as a key component of the Green Revolution for Africa (GR4A). In Uganda, biofortification efforts have centered on utilizing genetic modification (GM) as a means of enhancing the East African Highland Banana, known locally as matooke. This paper draws on three data sets to evaluate whether this technological fix synchs with existing farming systems. We argue that the positive scenario outlined by proponents rests on a number of assumptions related to the health, social and economic contexts facing producers.

English

Fusarium wilt of bananas (Musa species) is caused by Fusarium oxysporum f. sp. cubense (Foc). Foc race 1 in particular affects dessert bananas in Uganda, causing &gt;60% yield loss. This study was conducted to assess the performance of two new apple banana genotypes for bunch yield, resistance to Foc race 1 and consumer acceptability. The new apple banana genotypes (NAMU1 and NAMU2), along with two check cultivars, one susceptible but preferred by consumers (Sukali ndiizi) and the other resistant (Yangambi-KM5), were evaluated at the National Agricultural Research Laboratories in Uganda. Bunch yields of the two new apple bananas were higher than those of check cultivars by &gt;50%. NAMU1 and Yangambi-KM5 showed no symptoms of Foc race 1, whereas NAMU2 showed mild symptoms on its corms. Sukali ndiizi showed severe pseudostem splitting and corm discoloration as the key symptoms of Foc race 1. The consumer acceptability of NAMU1 and NAMU2 was as high as that of Sukali ndiizi, implying that they can be perfect substitutes for the Foc race 1 susceptible Sukali ndiizi.&nbsp; &nbsp; &nbsp; Key words: Dessert banana hybrids, host plant resistance, Panama disease, sensory attributes.

Banana21: From Gene Discovery to Deregulated Golden Bananas.

Uganda is a tropical country with a population in excess of 30 million, >80% of whom live in rural areas. Bananas (Musa spp.) are the staple food of Uganda with the East African Highland banana, a cooking banana, the primary starch source. Unfortunately, these bananas are low in pro-vitamin A (PVA) and iron and, as a result, banana-based diets are low in these micronutrients which results in very high levels of inadequate nutrition. This inadequate nutrition manifests as high levels of vitamin A deficiency, iron deficiency anemia, and stunting in children. A project known as Banana21 commenced in 2005 to alleviate micronutrient deficiencies in Uganda and surrounding countries through the generation of farmer- and consumer-acceptable edible bananas with significantly increased fruit levels of PVA and iron. A genetic modification approach was adopted since bananas are recalcitrant to conventional breeding. In this review, we focus on the PVA-biofortification component of the Banana21 project and describe the proof-of-concept studies conducted in Australia, the transfer of the technology to our Ugandan collaborators, and the successful implementation of the strategy into the field in Uganda. The many challenges encountered and the potential future obstacles to the practical exploitation of PVA-enhanced bananas in Uganda are discussed.

Yield Perceptions, Determinants and Adoption Impact of on Farm Varietal Mixtures for Common Bean and Banana in Uganda

Crop variety mixtures (different varieties of a crop grown together in a single plot) have been successfully deployed in pathogen and pest management for several crops including wheat, common bean and rice. Despite the available evidence, promotion of this approach has remained limited in many countries, including Uganda. The factors that influence farmers’ adoption of varietal mixtures for common bean and banana were assessed, as well as the perceptions of farmers on the effects of mixtures on yields, through household surveys and statistical modelling. A three-year yield increase in both common bean and banana varietal mixtures in farmer fields, of 5.2% and 28.6%, respectively, is realized using robust OLS estimates. The study reveals that accessing knowledge on the importance of crop varietal mixtures and the skills relating to the approach are crucial for their adoption. Location of the farm significantly determined the perceived yield change, which calls for more research into mixtures’ suitability under particular contexts in respect to compatibility of genotypes, management practices and appropriate acreage for maximum impact. The positive effects of mixtures on yields make it an effective bioeconomy strategy. Policies that minimize the adoption barriers could improve the adoption of crop varietal mixtures on a wider scale.

Azadirachta indica Reduces Black Sigatoka in East African Highland Banana by Direct Antimicrobial Effects against Mycosphaerella fijiensis without Inducing Resistance

Black Sigatoka is a major disease of East African highland cooking bananas in Uganda. Aqueous extracts of Azadirachta indica, Cinnamomum zeylanicum and Capsicum annuum have shown the potential to reduce Black Sigatoka in banana plantlets. The mechanisms by which plant extracts confer protection against plant pathogens has previously been reported to involve activation of defence and direct antimicrobial activity. In the current study, both antimicrobial activities of selected extracts were studied as well as expression of three defence-related genes using quantitative real-time PCR. Gene expression was compared in susceptible (cv. Musakala, genomic group AAA-EA) and resistant (cv. Kayinja, genomic group ABB) banana cultivars. Additionally, Musakala treated with A indica extract at 1 day before inoculation (DBI) was tested for induction of defence-related genes at 0, 10 and 20 days after inoculation (DAI). Pathogenesis-related genes (PR-1 and PR-3) and non-expressor of PR-genes (NPR1B) were up-regulated in the resistant cultivar. The genes analysed responded at late time points to M. fijiensis inoculation in both extract-treated and control plants in the susceptible cv. Musakala. On the other hand, A. indica and C. annuum completely inhibited mycelial growth of M. fijiensis at 30% (w/v). These findings suggest that the effect of plant extracts on Black Sigatoka is strongly associated with the direct antimicrobial effects.

Spread of Xanthomonas campestris pv. musacearum in banana plants: implications for management of banana Xanthomonas wilt disease

Banana Xanthomonas wilt (BXW) caused by Xanthomonas campestris pv. musacearum (Xcm) is a devastating disease of bananas in Uganda and across the Great Lakes region of East and Central Africa. While use of disease-free suckers is recognized as important to control BXW, bacterial movement from infected mother plants to their suckers is not well understood. In this study, the movement of Xcm through the pseudostem of naturally and artificially infected bananas was examined. In naturally infected plants, samples of plant organs collected from susceptible cultivars ‘Kayinja’, ‘Nfuuka’ and Kivuuvu’ (Musa acuminata) at various stages of disease were analysed using a polymerase chain reaction assay employing Xcm specific primers. Xanthomonas campestris pv. musacearum was detected in 70% of asymptomatic corms and suckers collected from each of the three susceptible cultivars. In ‘Kayinja’ and ‘Nakitembe’, Xcm was recovered from plant parts 20 cm away from the point of inoculation prior to symptom development. The population of Xcm was variable within and among the plant parts over time, with the highest number being recorded in the inoculated region for all cultivars. No disease was observed seven days after inoculation of the Xcm-resistant wild species M. balbisiana and Xcm was restricted to the point of inoculation. This study implies that by the time wilt symptoms are expressed, Xcm has migrated from the point of entry to most parts of the plants. Use of suckers from infected plants should be restricted as they are likely to be latently infected and could thus result in disease when transplanted.