Latest STMA Bulletin is out

Posted on dtma, Eastern Africa News, Eastern Africa News, Eastern Africa Publications, general, Media&Stories, Milestone Reports, News release, Newsletter, Newsletters, Publications, Reports, Research News, Research Publication, Seed System News, Seed System Publication, Seed Systems, Southern Africa News, Southern Africa Publications, Southern Africa Publications, West Africa News, West Africa Publications, May 14, 2020

Read the latest news from the just concluded Stress Tolerant Maize for Africa (STMA) initiative. This issue highlights the impact the project has had on farmers in sub-Saharan Africa, how it has helped build resilience of Africa’s smallholder farmers and how the improved maize varieties will enable partners to reach farmers on time to plant and produce maize during the COVID-19 crisis in different countries in SSA. You will also get to read about farmers getting an opportunity to select the stress tolerant varieties they prefer and why varietal taste matters.

Download the bulletin here.

DTMA genotyping call

Posted on general, September 13, 2010

The DTMA project would like to open the call for partner genotyping for 2010.

Genotyping services offered are detailed below. Any requests for genotyping need to reflect the aims of the DTMA project; materials must be DT or must be parents with high value characteristics that will be/are being used in DT breeding work.

Proposals submitted for consideration need to detail:

  • the objective of the genotyping (examples could include. using genotyping for seed quality control for drought tolerant germplasm or using genotyping for genetic distance analysis in order to select parents for drought tolerant hybrid crosses, but others will be considered).
  • the germplasm to be tested and characteristics (i.e. indicate the name of the line and pedigree and define known characteristics; drought tolerant, disease resistant (MSV, GLS)
  • timeline for sample submission

The services provided are:

Service Uses Notes
SNP genotyping of up to 100 inbred lines with 50 SNP#. For each inbred line four bulk samples of eight plants per bulk will be required. Quality control of lines. Assesses level of  uniformity and serves as a reference point for future seed generation DT germplasm or parents used in generation of DT
hybrids/OPVs. CIMMYT /
IITA materials may be listed but will not be included if data are already available
SNP genotyping of up to 40 inbred lines with 200 SNP#. One bulk of eight plants will be required per inbred line. Diversity assessment of own materials and comparison with CIMMYT/IITA materials DT germplasm or parents used in generation of DT
hybrids/OPVs. CIMMYT /
IITA materials may be listed but will not be included if
data is already available.
Bulk SSR genotyping of 20 samples of OPV or hybrid (these can be different materials or the same materials from different sources. 20 individual plants per sample will be required) with up to 40
SSRs (actual number will be defined by variability observed) ‡
Identify OPV and hybrid seed in market. Evaluate efficiency of OPV and hybrid production by out growers. Registered DT materials
only
# Partners will receive kits to harvest and send leaf samples to the laboratory providing the genotyping service. Partner will receive back a table detailing the SNP data calls of the materials submitted.
‡ Partners will submit seed or leaf to labs in Kenya (partners in E and S Africa) or Nigeria (partners in W and C Africa) for genotyping. Partners will receive a spreadsheet detailing the SSR data calls of the materials submitted

In addition to the services provided, we will also consider proposals from DTMA partners to conduct genotyping in their own facilities, though these proposals must be competitive with existing services. The total budget should not exceed $4000 and funds should cover laboratory and technical staff requirements, not field activities. Such proposals need to detail;

  • the objective of the genotyping e.g. using genotyping for seed quality control for drought tolerant germplasm or using genotyping for genetic distance analysis in order to select parents for drought tolerant hybrid crosses
  • the germplasm to be tested and characteristics (i.e. indicate the name of the line and pedigree and define known characteristics; drought tolerant, disease resistant (MSV, GLS)
  • the marker system suggested (SSR, SNP)
  • workplan with timeline
  • budget
  • the proposed location of the genotyping.

DNA extraction and genotyping facilities are available for use by DTMA partners at hubs in Kenya and Nigeria. SSR genotyping can be done at the hubs either by DTMA staff as needed or by PIs/co PIs of funded projects (lab experience required). For further information on costs please contact Sarah Hearne (shearne@cgiar.org) for information on Nigeria operations and Kassa Semagn (k.semagn@cgiar.org) for information on Kenyan operations. Only operational costs can be covered, costs for accommodation, travel and living expenses must be funded by applicants.

Responses to the call are to be submitted in electronic format to Sarah Hearne (shearne@cgiar.org). There is no closing date for the call. Projects will be funded continuously as budget allows. Proposals will be assessed by a panel of experts and judged according to their relevance to DTMA objectives. Up to 16 projects will be funded for E and S Africa and 8 projects for W and C Africa.

Definitions of common terms used in the DTMA Project

Posted on general, August 17, 2009

PDF version:

DTMA Definitions 2009

 

These definitions are:

 

Adoption

Adoption is the uptake of a technology by a farmer; the uptake and continuous use of a technology.

Drought tolerant (DT)

Among maize varieties that have similar maturity and similar grain yield under good conditions, a drought tolerant maize variety has a relative higher yield than others when drought occurs. To generate and disseminate such varieties is the focus of the DTMA project.

An early maturing maize variety may escape drought and has therefore a higher yield under drought. It however yields less when conditions are good.

Mega environments vs agroecologies/agroecological zones

Maize mega environment describes the geographic area within which maize varieties show similar ranking for grain yield due to similar growing conditions (rainfall, temperature, soil type). Mega environment cover more extensive areas than agroecologies/agroecological zones.

A maize agroecology/agroecological zone refers to a specific geographic region, usually covering a few countries in which the interactions of maize varieties with the environment (rainfall, temperature, soil type, altitude) are studied. Agroecology (as a study) provides an interdisciplinary framework with which to study the activity of agriculture.

Seed business vs seed merchant

A maize seed business is an organization that produces and markets maize seed.

A maize seed merchant is an organization that markets seed, without producing the seed: i.e., a buyer and seller of seed, like a retailer.

Seed demand vs production

Seed demand means wanting/needing seed and being able to pay for it. Demand is market driven; it is what the consumer (in this case the farmer) is requesting and is willing to pay for.

Production of seed involves area and yield. Production is what a supplier to that market is responsible for, he/she produces seed in order to address demand at a price he/she is willing to sell for.

Seed distribution

Seed distribution is the dissemination of seed from a producer to a farmer via formal or informal markets; the system of delivering seed from the production point to farmers.

Unmet market demand vs excess capacity

Unmet market demand means that demand is greater than supply while excess capacity means supply is greater than demand.

Unmet market demand: a situation whereby a consumer is unable to source material at a price they are willing to pay for a commodity or service.

Excess capacity: the ability to generate more produce than is currently being demanded.

© Copyright STMA 2017