CIMMYT Research Data & Software Repository Network
Not a member yet
1114 research outputs found
Sort by
Climate Smart Agriculture Influences Soil Enzymes Activity under Cereal-based Systems of North-West India
No full textSoil enzyme activities are important indicators of changes in management practices in crop production
systems. Measurements of different soil quality parameters are essential for assessing the impact of soil and
crop management practices. Keeping this in view, an experiment was conducted to evaluate the enzyme
activities namely, dehydrogenase (DHA), β-glucosidase, acid and alkaline phosphatase, fluorescein diacetate
hydrolases (FDH), cellulase, urease and arylsulphatase in soil after 7 years of the experimentation with
same management practices. The treatments were conventional rice-wheat system (Sc1), partial conservation
agriculture (CA)-based rice-wheat-mungbean system (Sc2), partial climate smart agriculture (CSA)-based
rice-wheat-mungbean system (Sc3), partial CSA-based maize-wheat-mungbean system (Sc4), full CSAbased
rice-wheat-mungbean system (Sc5), and full CSA-based maize-wheat-mungbean system (Sc6). Soil
samples were collected before sowing, maximum tillering, flowering, and at harvest of wheat crop from
surface layer (0-15 cm soil depth). Partial CA-based system (Sc2) exhibited higher DHA activity over
others. Also DHA activity in soil was higher at maximum tillering (16%), flowering (11%) and after
harvesting (3%) in rice-based CSA systems (mean of Sc3 and Sc5) over maize-based systems (mean of Sc4
and Sc6). On average, β-glucosidase and alkaline phosphatase activity was significantly higher in soils of
maize based systems than rice based systems. On average, improved practices (CA and CSA) based
scenarios (Sc2-Sc6) recorded 15 per cent higher FDH activity over farmers’ practice/ CT (Sc1). Significant
interaction effect was observed between the managements and enzyme activities. The CSA managements
were found beneficial in improving soil enzyme activities and thereby helping in improving nutrient
cycling besides influencing other soil properties in long run
Extract from the Results of the CIMMYT Maize Eastern Africa 2019 On-station Trials and 2020 On-farm Trials
No full textPhenotypic data collected in 2019 Stage 4 and 2020 Stage 5 trials for CIMMYT maize hybrid JH1104 as well as information about the trial sites are provided in this dataset. These trials were conducted through a network of partners, including NARS and private seed companies in Eastern Africa under various management and environmental conditions
Extract from the Results of the 2005 regional trials coordinated by CIMMYT: Evaluation of early-maturing (EPOP05) and intermediate- to late-maturing (ILPOP05) OPVs across eastern and Southern Africa in 2004/2005
No full textIn 2004 and 2005 CIMMYT organized Regional Trials to evaluate early-maturing (EPOP05) and intermediate- to late-maturing (ILPOP05) open-pollinated varieties (OPVs) across eastern and Southern Africa. Phenotypic data are provided in this dataset. These trials were conducted through a network of partners, including NARS and private seed companies, in Southern and Eastern Africa under various management and environmental conditions
Occurrence and diversity of arbuscular mycorrhizal fungi colonizing off-season and in-season weeds and their relationship with maize yield under conservation agriculture in Southern Africa
No full textWeeds are responsible for major crop losses worldwide but can provide beneficial agroecosystem services. This study aimed to elucidate how arbuscular mycorrhizal fungi (AMF) in weeds respond to host identity and conservation agricultural practices. The study was carried out at two locations in Southern Africa during off-season and in-season maize cultivation. Off-season AMF root colonisation, diversity indices and community composition significantly differed among weed species at both locations. Glomus sp. VTX00280 explains most of the AMF community differences. In-season, implementation of conventional tillage with mulching alone (CT + M) or together with crop rotation (CT + M + R) resulted in a 20% increase in AMF colonisation of the constantly occurring weed species, Bidens pilosa (BIDPI) and Richardia scabra (RCHSC), compared with conventional tillage plus rotations (CT + R). The diversity of AMF was highest under no-tillage plus mulching (NT + M). Off-season and in-season AMF structures of both BIDPI and RCHSC were not related, but 39% of the taxa were shared. Structural equation modelling showed a significant effect of the cropping system on weed AMF diversity parameters and weed and maize root colonisation, but no significant influence of weed root AMF traits and maize colonisation was detected on maize yield. This may be explained by the improvement in weed competitive ability, which may have offset the AMF-mediated benefits on yield. Our findings highlight that implementing M and CR to CT and NT positively affected weed AMF colonisation and diversity. The similarity between the off-season and in-season AMF composition of weeds supports the fact that weeds functionally host AMF during the non-crop period
Replication data for: Increased ranking change in wheat breeding under climate change
No full textA standard quantitative genetic model was used to examine how genotype-environment interactions have changed over the past decades from four spring wheat trial data sets. The variability of cross interactions for yield from one year to another is explained in more than 70% by climatic factors
CIMMYT Southern Africa Maize Regional On-Station (Stage 4) and On-Farm (Stage 5) Trials: Results of the 2019, 2021, and 2022 Seasons and Product Announcement
No full textNew and improved maize hybrids, developed by the CIMMYT Global Maize Program, are available for uptake by public and private sector partners, especially those interested in marketing or disseminating hybrid maize seed across Southern Africa and similar agro-ecological zones. Following a rigorous trialing and a stage-gate advancement process culminating in the 2022 Stage 5 trials, CIMMYT advanced a total of seven new elite maize hybrids in Southern Africa in 2022. Phenotypic data collected in Stage 4 and Stage 5 trials for the selected hybrids as well as information about the trial sites are provided in this dataset. These trials were conducted through a network of partners, including NARES and private seed companies, in Southern Africa under various management and environmental conditions
14th High Rainfall Wheat Screening Nursery
No full textCIMMYT annually distributes improved germplasm developed by its researchers and partners in international nurseries trials and experiments. The High Rainfall Wheat Screening Nursery (HRWSN) contains spring bread wheat (Triticum aestivum) germplasm adapted to high rainfall areas (Mega-environment 2)
16th High Rainfall Wheat Screening Nursery
No full textCIMMYT annually distributes improved germplasm developed by its researchers and partners in international nurseries trials and experiments. The High Rainfall Wheat Screening Nursery (HRWSN) contains spring bread wheat (Triticum aestivum) germplasm adapted to high rainfall areas (Mega-environment 2)
8th Wheat Yield Collaboration Yield Trial
No full textThe WYCYT international nurseries are the result of research conducted to raise the yield potential of spring wheat through the strategic crossing of physiological traits related to source and sink potential in wheat.
These trials have been phenotyped in the major wheat-growing mega environments through the International Wheat Improvement Network (IWIN) and the Cereal System Initiative for South Asia (CSISA) network, which included a total of 136 environments (site-year combinations) in major spring wheat-growing countries such as Bangladesh, China, Egypt, India, Iran, Mexico, Nepal, and Pakistan
Replication Data for: Sparse testing using genomic predication improves selection for breeding targets in elite spring wheat
No full textIn multi-environment yield trials, the use of sparse testing genomic selection enables increasing selection intensity or testing environments. The data presented in this dataset were used in the evaluation of different sparse testing genomic selection strategies in the early yield testing stage of CIMMYT spring wheat breeding pipeline. Phenotypic, genotypic, and coefficient of parentage data are provided. The germplasm is made up of multiple populations each with small family sizes. The findings of the study are detailed in an accompanying article