CIMMYT Research Data & Software Repository Network
Not a member yet
1114 research outputs found
Sort by
Maize yield and profitability in a 5 year conservation agriculture experiment in Papaloapan, Oaxaca
No full textThe dataset contains experimental data from the San Juan Cotzocon research platform in Oaxaca, Mexico. The database contains data on maize yield, management, profitability and phenology in relation to 8 evaluated treatments. The treatments differed in tillage (disk harrow, zero tillage or permanent raised beds), residue management (removing all or leaving all), fertilization (conventional and soil analysis based) and crop rotation (monoculture maize or rotation with legume
Availability of data on agrobiodiversity in South Asia: A metadata on data availability for Bangladesh, India, Nepal, and Pakistan
No full textHere we present a summary of public data availability for agrobiodiversity-related indicators of regional agrifood systems. Data have been drawn from surveys, reports, and censuses in Bangladesh, India, Nepal, and Pakistan
Complementary practices supporting conservation agriculture in southern Africa. A review
No full textConservation agriculture (CA)—the simultaneous application of minimum soil disturbance, crop residue retention, and crop diversification—is a key approach to address declining soil fertility and the adverse effects of climate change in southern Africa. Applying the three defining principles of CA alone, however, is often not enough, and complementary practices and enablers are required to make CA systems more functional for smallholder farmers in the short and longer term. Here, we review 11 complementary practices and enablers grouped under six topical areas to highlight their critical need for functional CA systems, namely: (1) appropriate nutrient management to increase productivity and biomass; (2) improved stress-tolerant varieties to overcome biotic and abiotic stresses; (3) judicious use of crop chemicals to surmount pest, diseases, and weed pressure; (4) enhanced groundcover with alternative organic resources or diversification with green manures and agroforestry; (5) increased efficiency of planting and mechanization to reduce labor, facilitate timely planting, and to provide farm power for seeding; and (6) an enabling political environment and more harmonized and innovative extension approaches to streamline and foster CA promotional efforts. We found that (1) all 11 complementary practices and enablers substantially enhance the functioning of CA systems and some (e.g., appropriate nutrient management) are critically needed to close yield gaps; (2) practices and enablers must be tailored to the local farmer contexts; and (3) CA systems should either be implemented in a sequential approach, or initially at a small scale and grow from there, in order to increase feasibility for smallholder farmers. This review provides a comprehensive overview of practices and enablers that are required to improve the productivity, profitability, and feasibility of CA systems. Addressing these in southern Africa is expected to stimulate the adoption of CA by smallholders, with positive outcomes for soil health and resilience to climate change
Reference genomes of two promising Phaseolus vulgaris common bean varieties for breeding purposes KATB1 and NABE12C
No full textThese two varieties are promising lines for future breeding of common beans for Africa. KATB1 is a yellow medium size commercial type highly demanded in east Africa with bush growth habit. It’s a released variety in Ethiopia, Kenya, the Democratic Republic of Congo (DRC), Tanzania and Burundi. This line is early maturing (60-65 days) and drought tolerant with high yield potential. The best performance of this line is achieved when grown at altitudes between 900 to 1600 meters above sea level. It is moderately tolerant to anthracnose and angular leaf spot root rot but susceptible to Pythium and Fusarium root rot diseases. Characteristics like sweet grain taste, low flatulence, and broth color after cooking make this line a highly desirable market-demanded variety (Amongi et al., 2020; Dryland Seed, 2020; Ndimbo et al., 2022). The NABE12C (MAC31) line is a large seeded sugar (cranberry) bean with climbing growth habit and important market characteristic, i.e., cream/beige with pink to purplish speckles. The grain is considered very tasty, making favorable thick broth when cooked. The grain type of NABE12C is highly demanded in east and southern Africa. The variety is relatively tolerant to anthracnose, Pythium and Fusarium root rot and common bacterial blight (CBB) and is officially released in Uganda (Blair et al., 2008; https://cgspace.cgiar.org/handle/10568/65909; https://www.cgiar.org/news-events/news/graduate-scaling-great-heights-growing-climbing-bean-in-uganda). The best performance of this line is achieved when grown at altitudes between 900-1800 meters above sea level. Reference genomes of a combination of a bush and a climbing bean type of demanded grain market class, i.e., medium sized yellow and large sized sugar/cranberry are useful molecular tools for breeding purposes towards market directed genetics.
References
Amongi, W., Kato, F., Male, A., Musoke, S., Sebuliba, S., Nakyanzi, B., et al. (2020). Resistance of Andean beans and advanced breeding lines to root rots in Uganda. African Crop Science Journal 28, 377–397.
Dryland Seed, L. (2020). Drought tolerance bean. 1–23.
Ndimbo, M., Shida, N., Mbiu, J., Kilango, M., Madata, C., Binagwa, P., et al. (2022). Variety Catalogue of Common Beans (Phaseolus vulgaris) Released in Tanzania. 47.
https://agrilinks.org/post/yellow-bean-corridor-seed-grain-trade-potential
https://pdf.usaid.gov/pdf_docs/PA00XS8V.pdf
https://ideas.repec.org/a/ags/ajfand/334107.html
</ul
Replication Data for: Genomic prediction of Synthetic Hexaploid Wheat upon tetraploid durum and diploid Aegilops parental pools
No full textInterspecific hybrids can be formed through allopolyploidization. Synthetic hexaploid wheats (SHW) have been created in breeding programs through the intentional crossing of tetraploid and diploid species. In this study, quantitative genetics tools developed to predict cross performance within a species were applied to predict the phenotypes of SHW for four major quantitatively inherited diseases using the data contained in this dataset. The results of the analysis are presented in the accompanying article
Imputed GbS-derived SNPs for Maize Landrace Accessions Represented in the SeeD-Maize GWAS Panel Recalled Using the B73 v.4 Reference Genome
No full textThis study presents the imputed SNP profiles from genotyping-by-sequencing of the accession parents of the SeeD GWAS testcross panel. The positions in the VCF files have been mapped against version 4 of the maize genome. The imputation was performed using the Beagle software
Experiments on frost damage in barley under conservation agriculture
No full textThe data were collected for the publication: "Does leaving crop residues in the field lead to greater frost damage in wheat and barley under conservation agriculture?" The dataset contains data from three experiments conducted to evaluate if leaving more residue in the field is associated with higher levels of frost damage. Farmers in the Bajio had indicated that leaving more crop residue in the field when sowing barley in permanent raised beds is associated with higher frost damage, which is an occasional problem in the region. To evaluate whether this is really the case frost damage was evaluated in a 1) a 2 year on farm experiment in San Juan del Rio, Queretaro, Mexico where barley was sown with different levels of residue retention, 2) An experiment with different types of tillage and levels of residue on the Sanjaya Rajaram station in Metepec, Mexico state, Mexico, where due to the high elevation frost damage was guaranteed to occur and 3) An comparison of yield in side by side comparison of conservation agriculture and conventional agriculture grown during the winter season across Mexico to assess whether conservation agriculture is associated with lower yields which could be indicative of a real problem
CIMMYT Southern Africa Maize Regional On-Station (Stage 4) and On-Farm (Stage 5) Trials: Results of the 2022 and 2023 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 2023 Stage 5 On-farm trials, CIMMYT advanced a total of three new elite maize hybrids in Southern Africa in 2023. 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
Unimputed GbS-derived SNPs for Maize Landrace Accessions Represented in the SeeD-Maize GWAS Panel Recalled Using the B73 v.4 Reference Genome
No full textThis study presents the unimputed SNP profiles from genotyping-by-sequencing of the accession parents of the SeeD GWAS testcross panel
The reference genome of Ipomea batatas variety “Benjamin” (CIP105085.2)
No full text“Benjamin” (CIP105085.2) is a modern variety first launched in Peru in 2010. It is tracing back to a cross of SR02.177 (CIP-102025.3) x INIA-100 (CIP-102033.5). Storage root flesh color is deep orange and taste type is moist and sweet. This variety is widely adapted within temperate dry lands of the tropics and subtropics and suitable for early harvest (90 days). The number of commercial roots per plant is very high with an excellent form and size for fresh markets. Yields are up to 60 t/ha