Plant Breeding Research Papers/Topics

Phenotypic Variation In Morphology, Yield And Seed Quality In Selected Accessions Of Leafy Amaranths

ABSTRACT Vegetable amaranths are highly valued for being rich in proteins and micronutrients such as iron, calcium, zinc, vitamin C and vitamin A. In spite of the crop’s exceptional nutritional qualities, very little effort has been put in to improve the foliage yield potential in Kenya. Reports on morphological phenotypic variation analysis in Amaranthus are rare and detailed agronomic recommendations for leaf and seed yields and quality enhancement are scanty. Research on the extent of th...

Genetic Diversity of Legume Nodulating Bacteria and the Effect of Nitrogen Sources on the Yield of Common Bean in Western Kenya

ABSTRACT Declining soil fertility in general and nitrogen (N) in particular limit crop production on many smallholder farms in western Kenya. Soil N deficiency is usually ameliorated with inorganic N fertilizers but their high costs preclude their use by resource poor smallholder farmers. In addition there are concerns that increased use of inorganic fertilizers could lead to environmental degradation. Organic inputs offer sustainable alternatives to expensive inorganic N fertilizers but the ...

Identification Of Maize (Zea Mays L.) Genotypes Resistant To Striga Hermonthica (Del.) And Determination Of Genetic Basis For Resistance

ABSTRACT The obligate root hemi-parasite, Striga hermonthica (Del.) Benth., native to sub-Saharan Africa causes serious economic constraint to cereal production. There has been limited study to understand the genetics of Striga tolerance or resistance in maize in Kenya and the information on mechanisms of resistance to Striga in maize in very limited. T he use of maize ( Zea mays L.) genotypes that support reduced Striga hermonthica emergence can form an important basis for developing Striga ...

Genetic Analysis Of Earliness And Drought Tolerance In Groundnut (Arachis Hypogaea L.) In Niger

ABSTRACT End-of-season drought, characterized by low and erratic rainfall, is the most important factor limiting groundnut (Arachis hypogaea L.) production in Niger. Information about farmers' varietal preferences and production constraints are limited. Genotypes have not yet been screened for earliness and tolerance to end-of-season drought. Data on combining ability and heritability estimates are not available. Development of varieties that have better ability to use limited available water...

Combining Ability And Yield Performance Studies Of Tropical Maize (Zea Mays L.) Germplasm Under Drought Stress And Well-Watered Environments

ABSTRACT Maize is increasingly consumed by Nigerien households. Limited studies have been conducted on the production and productivity of this crop in Niger and very few cultivars (mostly open pollinated varieties) are available to farmers. Knowledge and understanding of farmers’ preferences for new varieties would be invaluable in designing a successful maize breeding program. Maize cultivars grown in Niger are derived mainly from tropical yellow-grained extra-early and early-maturing lowl...

Genetic Control And Breeding For Seed Size And Colour In Cowpea [Vigna Unguiculata (L.) Walp]

ABSTRACT Consumer preference is very important in acceptance of an improved crop variety. Participatory rural appraisal (PRA) was therefore conducted on preferred traits of cowpea [Vigna unguiculata (L) Walp] among Ghanaian consumers in Ketu North, Ho and Akatsi districts. It was confirmed that the age long preference for large white cowpea among Ghanaian consumers still exists. Based on the results of the PRA, cowpea germplasm was assembled and used in genetic studies on seed coat colour and...

Genetic Diversity And Breeding Of Solanum Aethiopicum Shum Group For Drought Tolerance

ABSTRACT Solanum aethiopicum is one of the most important Solanum species, with four morphological groups. Two of the groups, Gilo and Shum, are mainly cultivated because of their nutritional value and income generating potential for farmers in developing countries. Of focus for this study was the Shum, a leafy morphological group whose productivity and quality is directly affected by drought. Global limitations on water resource availability call for the need to develop productive varieties ...

Genetic Analysis For Panicle Architecture And Grain Yield in Sorghum [Sorghum bicolor (L.) Moench] in Mali

 ABSTRACT Sorghum panicle architecture is a complex trait involving growth, elongation and branching pattern. The main objective of this research was to determine the genetic control of sorghum panicle architecture and its involvement in grain yield. Molecular markers associated with statistical analyses were used to identify the genomic regions or QTLs controlling quantitative traits. A population composed of 401 F4 families was derived from a cross between two contrasted parents for panic...

Genetic Analysis And Marker Assisted Breeding For Drought Tolerance And Yield In Chickpea (Cicer Arietinum L.)

ABSTRACT Chickpea is an important legume crop in the arid and semi-arid lands (ASALs). It is commonly grown during the post-rainy season under receding soil moisture conditions. This exposes the crop to drought especially terminal drought which occurs towards the end of the cropping period, causing high yield losses. Developing drought tolerant and high yielding chickpea genotypes, incorporating farmer prefer traits, is an important goal for plant breeders in the ASALs for increased productiv...

Development Of Topcross Hybrid Maize (Zea Mays L.) For Yield And Resistance To Maize Streak Virus Disease

Studies were conducted to explore the potential of utilizing Ghanaian maize landraces for improved grain yield and resistance to the maize streak virus disease. Farmer perceptions of the maize streak virus disease as well as constraints to the adoption of improved varieties and farmers’ continuous reliance on local landraces or farmer varieties and production constraints were investigated. Genomic characterization of Maize streak virus (MSV) strains found in the forest and transitions zones...

Characterization Of Cultivated Groundnut (Arachis Hypogaea L.) And Genetic Analysis Of Late Leaf Spot Resistance In Togo

ABSTRACT Though an important crop, the yield of groundnut has been decreasing for years because of a lack of a strong breeding programme in Togo. In recent years, efforts have been going on to establish a well-functioning breeding programme to develop varieties for improving productivity and production of groundnut. The main aims of this study were to: assess farmers’ perceptions of production constraints and preference criteria, characterize cultivated groundnut varieties and study genetic...

Genomic Study And Genetic Improvement of Sorghum [Sorghum bicolor (L) MOENCH] For High Protein Digestibility

ABSTRACT Sorghum is a staple crop and a major source of food and energy for the World’s developing countries. However, its utilization as human food is constrained by the low availability of its proteins after wet cooking which could lead to malnutrition, especially in sub-Saharan Africa. West Africa has a great diversity of sorghum yet, its study and use for improved protein digestibility remains unexplored. To provide knowledge on the characterization of West African sorghum germplasm fo...

IDENTIFICATION OF SOURCES AND LOCI FOR DEVELOPMENT OF SOYABEAN [Glycine max (L.) Merrill] CULTIVARS THAT COMBINE BACTERIAL PUSTULE AND SEED DECAY RESISTANCE WITH HIGH POD CLEARANCE

Globally, diseases constitute a major biotic constraint to soyabean production. Although, the list of diseases of soyabean in Ghana has been published, the incidence, severity, and distribution of listed diseases were not indicated. Secondly, the Savannah Agriculture Research Institute (SARI) has accumulated considerable number of soyabean genotypes most of which were sourced from the International Institute of Tropical Agriculture (IITA) and the United States Department of Agriculture (...

Genetic Improvement Of Root Yield And Nutritional Quality Of Cassava (Manihot Esculenta Crantz) In Sierra Leone

ABSTRACT Cassava storage root is a major staple. However, the tuber is poor in nutrients especially micronutrients. The study was conducted to improve the nutritional status of cassava with farmers’ preferred traits in Sierra Leone. The specific objectives were i) to assess adoption challenges, perception and preferences for provitamin A cassava among cassava value chain actors in Sierra Leone. ii) to estimate genetic diversity within provitamin A cassava germplasm using morphological, mole...

Genetic Improvement Of Cowpea (Vigna Unguiculata (L.) Walp) For Phosphorus Use Efficiency

ABSTRACT Cowpea is an important grain legume crop for millions of humans, fodder for livestock and source of income for all the value chain actors. Its productivity is constrained by several biotic and abiotic stresses such as drought and poor soil fertility. Aligned with poor soil fertility in most growing areas, this thesis describes phosphorus (P) use and acquisition of elite cowpea lines from different breeding programmes. In the first chapter, a brief overview was provided about cowpea a...


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