The African Plant Breeders of Tomorrow

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Genotype × Environment Interaction: A Prerequisite for Tomato Variety Development

Tomato (Solanum lycopersicum L.) is the second most important vegetable crop in the world due to its high level of nutrition particularly in vitamins and antioxidants. It is grown in several ecologies of the world due to its adaptability and ease of cultivation. Besides field conditions, tomatoes are grown in controlled environments which range from hydroponics and simple high tunnel structures to highly automated screen houses in advanced countries. However, the yield and quality of the fruits are highly influenced by the environment. This results in unpredictable performances in different growing environments in terms of quality, a phenomenon known as genotype by environment (G × E) interaction which confounds selection efficiency. Various approaches are employed by plant breeders to evaluate and address the challenges posed by genotype by environment interaction. This chapter discusses various field and controlled environments for growing tomatoes and the effect of these environments on the performance of the crop. The various types of genotype × environment interactions and their effect of the tomato plant are discussed. Finally, efforts are made to suggest ways and methods of mitigating the confounding effects of genotype × environment interaction including statistical approaches

Review on Tomato (Solanum lycopersicum, L.) Improvement Programmes in Ghana

Tomato is an important component of every Ghanaian meal, and its cultivation contributes significantly to livelihood improvement. The demand for tomato in Ghana outstrips supply, and therefore local production is augmented by imports from neighbouring countries. Despite the importance of tomato in Ghana, past tomato-breeding programmes have been unsystematic and had not led to the development of new varieties that meet the needs of consumers as well as environmental stresses. This review outlined tomato production trends, constraints and past tomato improvement programmes in Ghana, which mainly focused on germplasm collection, morphological and agronomic characterization, molecular evaluation, diversity study, as well as screening germplasm against biotic and abiotic stresses. The established variability and the outcomes of the evaluations against the various biotic and abiotic stresses have not been utilized in the development of new varieties. This work will serve as a reference for developing future tomato-breeding programmes

Pursuing discipleship for church growth: a practical theological study about the relational dynamics of pastoral leadership in three circuits of the Accra Diocese of the Methodist Church Ghana

Bibliography: pages 170-189Relational discipleship is found to hold a great potential for church growth. The Methodist Church Ghana uses Small Groups, referred to in the Methodist tradition as the Bible Class as effective tool for relational discipleship for church growth. Bible Class has been used from the inception of the church for exponential growth of the church. However, the rate of growth in recent years have been below targets. This study explored the factors affecting the positive outcomes of the utilization of the Bible Class meetings as effective tool for relational discipleship and for church growth. This study explored the participants’ knowledge and use of the structural arrangements put in place to help pastors and leaders to foster relational discipleship towards church growth (the numerical and spiritual growth and commitment of the church members); and the leadership and discipleship styles employed by the pastors and class leaders in pursuance of the goal of the church. Five (5) Societies in the Accra Diocese of the Methodist Church Ghana located in Accra, the capital city of Ghana, were involved in the study. Mixed Method Research that combined both qualitative (in-depth interviews and Focus Groups) and quantitative (structured questionnaires) research methodologies were used to explore the perspectives about the structural arrangements put in place to help pastors and leaders to foster relational discipleship, leadership/discipleship styles of the leaders; the benefit and usefulness of the Bible Class as a relational discipleship tool; their participation in church programmes and activities and the challenges they faced. The qualitative research consisted of 20 in-depth interviews and eight (8) focus groups with some church members, ministers and church leaders. The focus group discussions revealed that church members knew about the structural arrangements put in place to assist leadership of the church to foster closer relationship with their members in pursuance of discipleship. The study also revealed there were many challenges associated with the participation in the Bible Class Meetings and other church programmes and activities. The Bible Class meeting was cited as having been put in place for discipleship making and could be used to strengthen relationship between the church leadership and members. The findings from the qualitative phase were tested at the quantitative stage. The quantitative research method employed structured questionnaires administered to 650 church members, ministers and church leaders. The participants comprised 419 (64%) females and 231 (36%) males. Their ages ranged between 18 and 79 years with the majority (55%) between 18 and 40 years. The participants completed the questionnaires by themselves at the premises of their churches. The response rate was 100%. Three hypotheses were tested. The findings of the research suggest that the extent to which pastors and church leadership directly get involved in the affairs of their members with the view to making disciples and monitoring their spiritual growth influences church members’ interest in church activities and commitment to the church. It was also noted that leadership’s participation in church activities encourages members’ participation in church activities and programmes. Similarly, pastors and lay leaders who utilized the Bible Class or Small Group to build relationships with their members had greater numbers of members attending small group meetings and that pastors’ involvement makes the church members perceive class meeting as beneficial. However, only Interpersonal Leadership Style of Discipleship was positively associated with knowledge about church activities and participation in church activities and programmes. The more members know about Church activities, the greater their participation in those activities. There was no association between the other discipleship styles (e.g. serving, testimonial, intellectual) employed by leaders to foster relational discipleship. The discussions and conclusion of this study were based on these three studies (In-depth Interview, Focus Groups Discussions and the Structured Questionnaire Survey).Practical TheologyD. Phil. (Theology

Marker-Assisted Selection (MAS): A Fast-Track Tool in Tomato Breeding

Marker-assisted selection (MAS) is a complementary tool for conventional breeding where a molecular marker linked to a trait is indirectly selected. Many studies conducted have been able to identify and develop markers for traits such as disease and pest resistance and other abiotic stresses. Despite the availability of these markers, the technology has been extensively used in tomato breeding for the identification of some economic traits in particular disease resistance. In developed countries, MAS is utilized routinely in breeding programs, but this cannot be said for developing countries such as Africa. It is high time Africa as a continent looks at the importance of the technology and invests in it. In addition to MAS, other strategies such as marker-assisted backcrossing and recurrent selection have also been employed for breeding in tomato. The use of MAS in crop improvement will not only reduce the cost of developing new tomato varieties but will also increase the precision and efficiency of selection in the breeding program as well as lessen the number of years required to come up with a new crop variety

Field Assessment of Cowpea Genotypes for Drought Tolerance

Drought is one the most damageable constraints to crop production impacting negatively food security. The potential of cowpea to address food security is well established. However, drought due to limited rainfall is causing important yield losses. This study was conducted to assess cowpea genotypes for variability to drought tolerance at Saria Research Station, Burkina Faso, in 2012. Fifty cowpea genotypes were grown under drought stressed and non-stressed conditions. Plants grown under non-stressed conditions were watered regularly from sowing to maturity while those in the stressed conditions were watered from sowing to 50% flower bud initiation and thereafter, irrigation was withheld till harvest. Selection indices and principal component biplot were used to differentiate genotypes. A wide genotypic variability among the tested germplasm was found. In the Biplot displayed, genotypes were grouped into four categories according to their drought tolerance and yielding ability as indicated below: high yielding-drought tolerant (group A), high yielding-drought susceptible (group B), and low yielding-drought tolerant (group C), and low yielding-drought susceptible (group D). The stress tolerance index was the best criterion for assessing genotypes for variability to drought tolerance because it enabled the identification of high yielding and drought tolerant genotypes

Prospects for Intensifying Soil Fertility Management on the Growth and Yield of Assava in Ghana

Crop-specific fertilizer recommendations are necessary to improve yield and enhance food security in Ghana. This approach would help in improving crop productivity while maintaining a good soil health status. A new NPK fertilizer has been recently developed by the private sector with Nitrogen (N), Phosphorus (P), and Potassium (K) proportions of 11:22:21 respectively for improved cassava root yield. This study evaluated the right and economic rate of this fertilizer to apply for improved cassava productivity and farmer livelihoods. Rates of 0, 300, 400, 600, and 800 kg/ha of newly developed fertilizer were applied at Fumesua and Akumadan located in the forest agro-ecological zone, and at Ejura and Techiman located in the transitional agro-ecological zone of Ghana. The experiments were conducted in two growing seasons (May 2019 to April 2020 and May 2020 to April 2021). Increases in cassava growth were observed with the increasing levels of fertilizer at all locations and in the two growing seasons. Cassava yield was in the linear phase of the fertilizer response curve. It ranged from 28 to 52 tons/ha with the increasing fertilizer levels. Cassava in the forest agro-ecology had better growth and 25% more yield than other locations. Fertilizer rates between 0 and 400 were found to have the best yield returns and sufficient profit opportunities to sensitize adoption by financially constrained farmers. The results indicate that the newly developed fertilizer (11:22:21 N:P2O5:K2O) can improve cassava productivity in the inherently poor soils of Ghana. Keywords: fertilizer recommendation; plant nutrients; rainfall; agronomic practices; cassava productivity; root yield DOI: 10.7176/JBAH/12-18-03 Publication date:September 30th 202

Research and Development for Improved Cassava Varieties in Ghana: Farmers’ Adoption and Effects on Livelihoods

The importance of Cassava in the food systems of Ghanaians cannot be underestimated. As a main staple crop, Cassava contributes about 22% and 30% to the Agricultural Gross Domestic Product (AGDP) and daily calories intake respectively. Per capita consumption of 152 kg makes it the highest among all food crops. Due to Cassava’s importance, there have been lots of attention paid to it by the Government and Donor agencies towards its improvement. This has yielded substantial results in terms of the development of cassava varieties and good agronomic practices. This chapter reviewed cassava technologies development in Ghana, adoption of these technologies by smallholder farmers, and livelihood implications. Results generated showed that Research and Development since 1993 has developed, released, and disseminated 25 new cassava varieties to smallholder farmers. Average cassava yields have increased from about 14 t/ha in 2009 to 21 t/ha in 2018. Partial budget analysis showed that smallholder farmers’ profitability has increased over the years from GH₵644.32 (about US$111) in 2009 to GH₵5243.27 (about US$ 904) in 2018. Again, the crop is gradually gaining attention as an industrial crop for flour, starch, and alcohol production, a drive that would further improve on returns to farmers. It is a food security crop because it is robust, produces more per unit area, and versatile for multiple usages in household foods and derivatives. It is recommended that continuous policy consideration on cassava in national agricultural agenda setting is essential