Overslaan en naar de inhoud gaan

page search

Displaying 3577 - 3588 of 17903

Transcriptomic profiling suggests candidate molecular responses to waterlogging in cassava

december, 2021
Global

Owing to climate change impacts, waterlogging is a serious abiotic stress that affects crops, resulting in stunted growth and loss of productivity. Cassava (Manihot esculenta Grantz) is usually grown in areas that experience high amounts of rainfall; however, little research has been done on the waterlogging tolerance mechanism of this species. Therefore, we investigated the physiological responses of cassava plants to waterlogging stress and analyzed global gene transcription responses in the leaves and roots of waterlogged cassava plants.

Genomic analysis of resistance to fall armyworm (Spodoptera frugiperda) in CIMMYT maize lines

december, 2021
Global

The recent invasion, rapid spread, and widescale destruction of the maize crop by the fall armyworm (FAW; Spodoptera frugiperda (J.E. Smith)) is likely to worsen the food insecurity situation in Africa. In the present study, a set of 424 maize lines were screened for their responses to FAW under artificial infestation to dissect the genetic basis of resistance. All lines were evaluated for two seasons under screen houses and genotyped with the DArTseq platform.

Capacities and needs assessment of gender research in CGIAR

december, 2021
Kenya

"In November 2020, CGIAR commissioned Michigan State University’s Center for Gender in Global Context (GenCen) to conduct a capacities and needs assessment (CNA) to determine, with the participation of stakeholders throughout CGIAR and (to a lesser extent) the broader agricultural research for development (AR4D) network, how the GENDER Platform could best strengthen the capacities needed to achieve the Platform’s desired outcomes. Four overarching questions guided the CNA:
• What is quality gender research?

Performance of a hermetic device and neem (Azadirachta indica) in storing wheat seed: Evidence from participatory household trials in central Bangladesh

december, 2021
Bangladesh

Smallholder farmers in Bangladesh often use low-density polyethylene (LDPE) bags contained within woven polypropylene bags to store wheat seed during the summer monsoon that precedes winter season planting. High humidity and temperature during this period can encourage increased seed moisture and pests, thereby lowering seed quality.

Food composition table of selected local tree species in Burkina Faso. Version 1

december, 2021
Burkina Faso

Food composition tables (FCT) inform on the nutritional composition of foods consumed and are an essential resource for understanding and analyzing dietary intake data related to both individuals and communities, and for developing healthy recipes and food products. They are a fundamental piece of knowledge to support interventions related to improving nutrition, health, and food security in all contexts.

Estimation of soybean grain yield from multispectral high-resolution UAV data with machine learning models in west Africa

december, 2021
Global

Soybean (Glycine max (L.) Merr.) is a leguminous and oil crop with rapidly growing importance and demand in Africa following the increasing demand for oil and livestock and poultry feed in sub-Saharan Africa. However, soybean productivity is low in most countries of sub-Saharan Africa, especially in West Africa, where productivity is below one ton per ha. Hence, concerted soybean varietal development and testing efforts have been underway by the International Institute of Tropical Agriculture (IITA), collaborating with the various African and US-based soybean breeding programs.

Digital extension, price risk, and farm performance: experimental evidence from Nigeria

december, 2021
Nigeria

Despite decades of investment in agricultural extension, technology adoption among farmers and agricultural productivity growth in Sub-Saharan Africa remain slow. Among other shortcomings, extension systems often make recommendations that do not account for price risk or spatial heterogeneity in farmers' growing conditions. However, little is known about the effectiveness of extension approaches for nutrient management that consider these issues.

Evaluation of the efficacy of Flupyradifurone against Bemisia tabaci on cassava in Tanzania

december, 2021
Global

A novel butenolide insecticide—flupyradifurone (Sivanto SL 200)—was evaluated for efficacy against cassava-colonizing Bemisia tabaci whitefly under laboratory, screenhouse and field conditions. LC50 values from leaf disc spray assays were comparable for both flupyradifurone (12.7 g a.i/100 L) and imidacloprid (12.6 g a.i/100 L). Both insecticides caused high levels of adult whitefly mortality in leaf disc and leaf dip assays when compared to untreated controls.

Report of the global online survey to identify key knowledge and capacity gaps on diagnostics and surveillance of pests & diseases in targeted countries

december, 2021
Global

An online survey was co-designed in collaboration with CGIAR Germplasm Health Units (GHUs) leaders and social scientists of the Plant Health Initiative (PHI), with the objective to identify and map the key knowledge and capacity gaps on lab/field detection, characterization, and surveillance of P&D of local and regional NPPOs in targeted countries. The questionnaire consisted of 43 open-ended, single and multiple-choice questions.

Receptor-like Kinases (LRR-RLKs) in response of plants to biotic and abiotic stresses

december, 2021
Global

Plants live under different biotic and abiotic stress conditions, and, to cope with the adversity and severity, plants have well-developed resistance mechanisms. The mechanism starts with perception of the stimuli followed by molecular, biochemical, and physiological adaptive measures. The family of LRR-RLKs (leucine-rich repeat receptor-like kinases) is one such group that perceives biotic and abiotic stimuli and also plays important roles in different biological processes of development.

Tephritid fruit fly species composition, seasonality, and fruit infestations in two central African agro-ecological zones

december, 2021
Global

Bactrocera dorsalis and several Africa-native Ceratitis species are serious constraints to fruit
production in sub-Saharan Africa. A long-term trapping and fruit collection study was conducted
(2011–2016) in two contrasting agro-ecological zones (AEZs) of Cameroon to determine fruit fly
species composition, seasonality, attraction to various lures and baits, and fruit infestation levels.
Ten tephritid species from genera Bactrocera, Ceratitis, Dacus, and Perilampsis were captured in traps.

Adaptability and Stability of Faba Bean (Vicia faba L.) Accessions under Diverse Environments and Herbicide Treatments

december, 2021
Global

The adaptability and stability of 37 faba bean (Vicia faba L.) accessions with different levels of tolerance to metribuzin or imazethapyr was assessed across 12 season–location–herbicide experiments. Significant Genotype x environment (GE) interaction was found for the days to flowering (DFLR), plant height (PLHT) and grain yield (GY). Performance and stability of the accessions regarding PLHT and GY were assessed using four different stability parameters: cultivar superiority, static stability, Wricke’s eco-valence and Finlay and Wilkinson’s regression model.