A5003123878- Genetics and Plant Breeding
- Genetic Mapping and Diversity in Plants and Animals
- Genetic and phenotypic traits in livestock
- Cocoa and Sweet Potato Agronomy
- Plant Disease Resistance and Genetics
- Plant Virus Research Studies
- Plant nutrient uptake and metabolism
- Rice Cultivation and Yield Improvement
- Plant Pathogens and Resistance
- Crop Yield and Soil Fertility
- Plant Pathogenic Bacteria Studies
- Chromosomal and Genetic Variations
- Plant Micronutrient Interactions and Effects
- Agricultural Practices and Plant Genetics
- Banana Cultivation and Research
- Plant Stress Responses and Tolerance
- Cassava research and cyanide
- Potato Plant Research
- Sugarcane Cultivation and Processing
- Plant Genetic and Mutation Studies
- Agricultural pest management studies
- Soil Carbon and Nitrogen Dynamics
- Optimal Experimental Design Methods
- Genetic diversity and population structure
- Plant Reproductive Biology
International Maize and Wheat Improvement Center
2020-2025
Centro Internacional de Mejoramiento de Maíz Y Trigo
2022-2024
World Agroforestry Centre
2021-2024
International Potato Center
2016-2023
International Potato Center
2019-2021
North Carolina State University
2020
University of Hohenheim
2014-2015
Kenya Agricultural and Livestock Research Organization
2014-2015
Kenya Agricultural Research Institute
2014
Sweetpotato [Ipomoea batatas (L.) Lam.] is a globally important staple food crop, especially for sub-Saharan Africa. Agronomic improvement of sweetpotato has lagged behind other major crops due to lack genomic and genetic resources inherent challenges in breeding heterozygous, clonally propagated polyploid. Here, we report the genome sequences its two diploid relatives, I. trifida triloba, show that these high-quality assemblies are robust references hexaploid sweetpotato. Comparative...
The hexaploid sweetpotato (
β-Carotene content in sweetpotato is associated with the Orange and phytoene synthase genes; due to physical linkage of sucrose synthase, β-carotene starch are negatively correlated. In populations depending on for food security, an important source calories, while provitamin A. The negative association between two traits contributes low nutritional quality consumed, especially sub-Saharan Africa. Using a biparental mapping population 315 F
In developing countries, the sweetpotato, Ipomoea batatas (L.) Lam. [Formula: see text], is an important autopolyploid species, both socially and economically. However, quantitative trait loci (QTL) mapping has remained limited due to its genetic complexity. Current fixed-effect models can fit only a single QTL are generally hard interpret. Here, we report use of random-effect model approach map multiple based on score statistics in sweetpotato biparental population ('Beauregard' ×...
Sweetpotato is a resilient food crop with great potential to contribute reduced hunger in the world. shows significant reducing Global Hunger Index, which reflects deficiencies calories and micronutrients based on components of hunger, undernourishment, under-five mortality rate, stunting wasting. Its genetic diversity has been harnessed through breeding increase vitamin A, iron, zinc content, virus resistance climate resilience for world's needs. Africa India are most food-insecure regions....
Formalized breeding schemes are a key component of program design and gateway to conducting plant as quantitative process. Unfortunately, rarely defined, expressed in quantifiable format, or stored database. Furthermore, the continuous review improvement is not routinely conducted many programs. Given rapid development novel methodologies, it important adopt philosophy regarding scheme design. Here, we discuss terms definitions that relevant formalizing pipelines, market segments schemes,...
Drought stress caused by unpredictable precipitation poses a major threat to food production worldwide, and its impact is only expected increase with the further onset of climate change. Understanding effect drought on crops plants' response critical for developing improved varieties stable high yield fill growing gap from an increasing population depending decreasing land water resources. When plant encounters stress, it may use multiple types, environmental conditions, intensity duration,...
Key message Polypoid crop breeders can balance resources between density and sequencing depth, dosage information fewer highly informative SNPs recommended, non-additive models QTL advantages on prediction dependent trait architecture. Abstract The autopolyploid nature of potato sweetpotato ensures a wide range meiotic configurations linkage phases leading to complex gene-action pose problems in genotype data quality genomic selection analyses. We used 315-progeny biparental F 1 population...
West Africa (WA) is among the most food insecure regions. Rapid human population growth and stagnating crop yields greatly contribute to this fact. Poor soil fertility, especially low plant available phosphorus (P) constraining production in region. P-fertilizer use WA lowest world due inaccessibility high prices, often unaffordable resource-poor subsistence farmers. This article provides an overview of P-deficiency opportunities overcome it by exploiting sorghum pearl millet genetic...
Abstract The CGIAR Research Program (CRP) on Roots, Tubers and Bananas (RTB) includes vegetatively propagated staple crops linked by common breeding, seed, postharvest issues, the frequency with which women are involved in their production use. RTB backbone of food security across humid tropics sub-Saharan Africa (SSA) more localized areas Asia Latin America. Around 300 million poor people developing countries currently depend value chains for security, nutrition income. Climate change poses...
Continuous storage root formation and bulking (CSRFAB) in sweetpotato is an important trait from agronomic biological perspectives. Information about the molecular mechanisms underlying CSRFAB traits lacking.Here, as a first step toward understanding genetic basis of sweetpotato, we performed genome-wide association study (GWAS) using phenotypic data four distinct developmental stages 33,068 single nucleotide polymorphism (SNP) insertion-deletion (indel) markers. Based on Bonferroni...
Reciprocal recurrent selection sometimes increases genetic gain per unit cost in clonal diploids with heterosis due to dominance, but it typically does not benefit autopolyploids. Breeding can change the dominance as well additive value of populations, thus utilizing heterosis. A common hybrid breeding strategy is reciprocal (RRS), which parents hybrids are recycled within pools based on general combining ability. However, relative performances RRS and other strategies have been thoroughly...
General combining ability (GCA) is the major selection criterion for new sweetpotato (Ipomoea batatas) parents in a reciprocal recurrent (RRS) scheme. Here we aimed to estimate GCA and specific (SCA) by using 16 potential testers involved an 8 × partial diallel propose procedure identify breeding. Data on storage root yield tons per hectare (rytha), virus disease (vir2) from 64 families (1,913 clones) were collected five trials at two locations Uganda. The estimates of female accounted...
Sparse testcrossing is an effective strategy for increasing both short- and long-term genetic gain in hybrid breeding programs. Maize programs aim to develop new varieties by crossing genetically distinct parents from different heterotic pools, exploiting heterosis improved performance. The typically consist of two main components: population improvement product development. component aims enhance the pools through reciprocal recurrent selection based on general combining ability (GCA)....
Sweet potato (Ipomoea batatas [L.] Lam.) is an important subsistence crop in Sub-Saharan Africa, yet as for many crops, yield can be severely impacted by drought stress. Understanding the genetic mechanisms that control tolerance facilitate development of drought-tolerant sweet cultivars. Here, we report expression profiling study using US-bred cultivar, Beauregard, and a Ugandan landrace, Tanzania, treated with polyethylene glycol (PEG) to simulate sampled at 24 48 hr after At each...
Quality assurance and control (QA/QC) is an essential element of a breeding program's optimization efforts towards increased genetic gains. Due to auto-hexaploid genome complexity, low-cost marker platform for routine QA/QC in sweetpotato programs still unavailable. We used 662 parents the International Potato Center (CIP)'s global program spanning Peru, Uganda, Mozambique Ghana, develop low-density highly informative single nucleotide polymorphism (SNP) set be deployed QA/QC. Segregation...
This paper presents a general framework for simulating plot data in multi-environment field trials with one or more traits. The is embedded within the R package FieldSimR, whose core function generates errors that capture global trend, local variation, and extraneous variation at user-defined ratio. FieldSimR’s capacity to simulate realistic makes it flexible powerful tool wide range of improvement processes plant breeding, such as optimisation experimental designs statistical analyses...
Breeding in the CGIAR Research Program on Roots, Tubers and Bananas (RTB) targets highly diverse biotic abiotic constraints, whilst meeting complex end-user quality preferences to improve livelihoods of beneficiaries developing countries. Achieving breeding increasing rate genetic gains for these vegetatively propagated crops, with long cycles, genomes high heterozygosity different ploidy levels, is challenging. Cheaper sequencing opens possibilities apply genomics tools traits, such as...
β-amylase is a thermostable enzyme that hydrolyses starch during cooking of sweetpotato (Ipomoea batatas) storage roots, thereby influencing eating quality. Its activity known to vary amongst genotypes but the genetic diversity beta-amylase gene (Amyβ) not well studied. Amyβ has highly conserved region between exon V and VI, forming part enzyme's active site. To determine diversity, 2.3 kb fragment, including was sequenced from 25 genotypes. The effect sequence variation on expression,...
Sweetpotato,
Abstract Regular measurement of realized genetic gain allows plant breeders to assess and review the effectiveness their strategies, allocate resources efficiently, make informed decisions throughout breeding process. Realized estimation requires separating trends from nongenetic using linear mixed model (LMM) on historical multi‐environment trial data. The LMM, accounting for year effect, experimental designs, heterogeneous residual variances, estimates best unbiased estimators genotypes...
ABSTRACT Pearl millet [ Pennisetum glaucum (L.) R. Br] is a food security crop for millions living in drylands of Africa and Asia. Its production on acid sandy soils the Sahel limited by erratic rainfall poor soil fertility, especially low P soils. We sought to elucidate genetic variation West Central African landrace‐derived inbred lines grain yield under conditions, determine their performance as per se hybrid combinations, quantitative‐genetic parameters derive an appropriate breeding...