Abstract High seedling mortality during the establishment phase of cocoa has become a critical constraint to sustainable farming. The objective this study was develop varieties with higher survival compared cultivars currently recommended for planting in denuded regions. Thirty‐seven families composed into two sets 18 (families from clones) and 19 recently introduced were evaluated field under full sunlight dry weather conditions. Families differed significantly vigour (increase trunk...

Accurate genotype identification is imperative for effective use of Coffea canephora L. germplasm to breed new varieties with tolerance or resistance biotic and abiotic stresses (including moisture stress pest disease such as coffee berry borer rust) high yield improved cup quality. The present study validated 192 published single nucleotide polymorphism (SNP) markers selected a panel 120 loci examine parentage labeling errors, genetic diversity, population structure in 400 C. accessions...

Cola nitida known as Kola serves flavouring ingredient in the food industry and is also of great importance during traditional rites Africa. Despite well-known pharmaceutical values species, efforts to develop improved varieties with enhanced nutraceutical quality limited due unavailability information on variation genotypes bioactive compounds nuts. The objectives this research were evaluate 25 kola for contents, determine relationship between nutritional phenolic traits identify good use...

Assessing the level of genetic variation that exist in any breeding population is important as this has significant implications for selection and variety development. The objectives present study were to determine among 71 Robusta coffee genotypes based on 21 traits relationships between genotypes. established 2013 clones raised from single node cuttings planted a randomized complete block design with four blocks, five plants per genotype block. There was all assessed different evidenced by...

Effectiveness of plant improvement programs, especially in perennial crops like coffee, may be improved by knowing the level genetic variation which exist within a breeding population coupled with knowledge estimates parameters for key agronomic traits. Thus, this study was conducted to evaluate C. canephora clones growth (stem diameter, number laterals and span) yield traits; estimate these determine phenotypic associations between traits guide future crop efforts. The productivity 56...

ABSTRACT Soybean [ Glycine max (L.) Merr.] breeding in the United States currently relies on a narrow genetic base. For decades, but more intensely recent years, efforts have been made to incorporate exotic soybean germplasm into pool. Although wild ( G. soja Seib. and Zucc.) is genetically much diverse than soybean, less effort has devoted utilizing breeding. The objectives of this research were identify high‐yielding lines derived from crosses between five accessions cultivars determine if...

Soybean [ Glycine max (L.) Merr.] breeding in the United States currently relies on a narrow genetic base. tomentella Hayata (2 n = 78), native to Australia, is perennial relative tertiary gene pool of soybean. No effort has been devoted using this species increase seed yield. The objectives research were (i) identify high‐yielding lines derived from backcrosses between soybean cultivar Dwight 40) and G. PI 441001 78) compare their agronomic performance with that recurrent parent, (ii)...

Cashew (Anacardium occidentale L) is an important cash crop cultivated by about 3 million households in Africa and serves as the livelihood for many African farmers, especially Ghana. Despite importance of cashew a commodity with increasing cultivation Northern Ghana, challenged problems such as, low variable nut yields, kernel out turn percentage susceptibility to insect pests result establishing farms unselected seeds. In order address challenges, Cocoa Research Institute Ghana established...

Kola (Cola nitida) is an important economic cash crop for many West and Central African countries. It has several medicinal uses in the pharmaceutical industries also plays a major role traditional marriages among Islamic communities across Africa. The extensively cultivated Nigeria Ghana. However, it exhibit signs of total partial sterility as well self incompatibility when propagated from seeds most cases. Therefore, grafting seen method choice addressing problem stated above. Though...

Abstract Introduction of clones from genetic groups that are underrepresented in the pedigree commercial cacao varieties West Africa represents an important aspect improvement strategy broadening base to overcome current yield stagnation crop. The objective present study was determine combining abilities more recently introduced for and cropping efficiency early bearing years. Seven were crossed as males five commonly used seed gardens Ghana using a North Carolina II design. 35 F 1 one...

Abstract The choice of parents is a vital first step in any variety development process. This particularly imperative tree crops that require minimally 15–20 years to complete varietal development. present study was conducted determine genetic distances (GDs) between parental clones Robusta coffee hybrids and assess the relationship GD hybrid performance. experimental material consisted 64 56 hybrids. were evaluated over 11 years, planted randomized block design with six replications. among...

Abstract Understanding the genetic variability, heritability and advance (GA) of traits in any plant population is an important pre-requisite for variety development. The objectives study were to assess level variability among vegetative growth yield, relationship yield predict GA most heritable Robusta coffee full-sib families. trial was established June 2009 at experimental fields Cocoa Research Institute Ghana with 62 families planted a randomized complete block design six replications....

Cashew (Anacardium occidentale L.) is an important tropical cash crop cultivated in Ghana. It provides livelihood for about 200,000 people and contributes 6.1% to Ghana’s gross domestic product (GDP). Four Brazilian dwarf accessions were introduced improve nut yield. Objectives of this study (1) assess the agronomic performance across two contrasting ecologies, (2) determine environmental influence on juvenile growth, (3) relationship between early vegetative growth yield (4)...

Increasing the genetic base of current parental cacao varieties grown in West Africa with clones that are able to perform well under marginal conditions could improve production. Survival and yield 30 different cocoa more recent introductions were compared five improved natural field Ghana. A randomized complete-block design replications was used evaluate 35 for following traits: percentage survival, increase trunk cross-sectional area (TCSA), canopy spread, bean mass yield. Significant (p <...

Quantifying the level of variation and estimates genetic parameters are important to make informed decisions regarding improvement agronomic traits in Coffea canephora. The objectives present study were assess growth yield performance 54 C. canephora clones derived through ortet selection, based on from a previous hybrid trial; estimate (stem diameter, height, span, number laterals, length laterals diameter laterals), yield; determine relationship between traits. planted field 2009 using...

Variety development, particularly for tree crops is a long-term exercise requiring significant resource investments, over many years of evaluation. Identification traits at early growth stages that are predictive future performance would facilitate the breeding process. The objective this study was to assess value juvenile trunk cross-sectional area (TCSA) and number laterals selecting high-yielding Robusta coffee (Coffea canephora) genotypes, in programme. Seventy-two clones developed by...

Pleiotropy is considered to have a significant impact on multi-trait evolution, but its roles in the evolution of domestication-related traits crop species been unclear. In soybean, several known quantitative trait loci (QTL) controlling maturity, called maturity loci, are major effects both flowering and highly correlated pleiotropic manner. Aiming at identification non-pleiotropic QTLs that independently control dissecting pleiotropy these important agronomic traits, we conducted QTL...