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Saturday, November 7, 2020 | History

2 edition of Development and spread of improved maize varieties and hybrids in developing countries found in the catalog.

Development and spread of improved maize varieties and hybrids in developing countries

David H. Timothy

Development and spread of improved maize varieties and hybrids in developing countries

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Published by Bureau for Science and Technology, Agency for International Development in Washington, D. C .
Written in English


Edition Notes

StatementDavid H. Timothy, PaulH. Harvey, and Christopher R. Dowswell.
ContributionsHarvey, Paul H. 1947-, Dowswell, Christopher R.
ID Numbers
Open LibraryOL13929018M

  A couple follow-ups: A lot of corn grown in Mexico are hybrids and this is in fact has the premier institute for maize and wheat breeding, CIMMYT (which spearheaded the Green Revolution). Mexican farmers grow a small amount of landraces for home consumption but this method of production can never feed 9 billion people.


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Development and spread of improved maize varieties and hybrids in developing countries by David H. Timothy Download PDF EPUB FB2

Improved Maize Varieties and Hybrids in Developing Countries for Ater ational Development / ik f *1=_ N. ' t /Irl N ABSTRACT Maize is the third most important cereal crop in the developing world, after rice and wheat.

Attempts have been made over many years to improve maize varieties and hybrids used in developing countries. Get this from a library. Development and spread of improved maize varieties and hybrids in developing countries. Development and spread of improved maize varieties and hybrids in developing countries book H Timothy; Paul H Harvey; Christopher R Dowswell; United States.

Agency for International Development. Bureau for Science and Technology.]. Development and spread of improved maize varieties and hybrids in developing countries.

May 26th. CIMMYT. Maize disease. A guide for field identification. May 26th. Maize Growth and Development. May 26th. a,ann, and J. Dixon. Rice maize systems in Asia: current situation and potential.

Adoption of modern varieties of maize, characterised by higher genetic potential, is desirable from the viewpoint of increasing the maize yield level. At present, there is no well-structured and organised system for documenting the popular crop varieties and their area coverage in India.

The present study attempts to fill such knowledge gaps by documenting the major maize varieties and Cited by: 1. Maize (/ m eɪ z / MAYZ; Zea mays subsp. mays, from Spanish: maíz after Taino: mahiz), also known as corn (American English), is a cereal grain first domesticated by indigenous peoples in southern Mexico ab years ago.

The leafy stalk of the plant produces pollen inflorescences and separate ovuliferous inflorescences called ears that yield kernels or seeds, which are : Tracheophytes. Maize breeding or improvement is the art and science of manipulating the genetic composition of the maize genotype(s) for developing desirable cultivars.

Development of a new cultivar involves more than genetic variability and heredity. Selection is a primary tool associated with plant breeding techniques.

It is basically involved in. Breeding for improved drought tolerance in maize adapted to southern Africa Development and transfer of improved maize varieties. Should developing countries invest more in less favoured. The development and deployment of high-yielding stress tolerant maize hybrids are important components of the efforts to increase maize productivity in eastern Africa.

Open Pollinated Seeds Vs Hybrids. The term “hybrid,” which you’ll often see in seed catalogs, refers to a plant variety developed through a specific, controlled cross of two parent plants. Hybrids are often spontaneously and randomly created in nature when open-pollinated plants naturally cross-pollinate with other related varieties.

A breeding program was set up, with the main objective to develop maize varieties with improved nitrogen use efficiency, using a participatory approach.

As a first step, a participatory variety evaluation of 16 maize varieties with good tolerance to low soil nitrogen levels was by: 6. Maize stripe is managed through resistant hybrids and cultivars, and by controlling vector populations.

A related virus, Maize yellow stripe virus, is transmitted by C. chinai Ghauri and found in Egypt (Ammar, Khlifa, Mahmoud, Abol-Ela, & Peterschmitt, ; Mahmoud et al., ). In developed countries, maize is consumed mainly as second-cycle produce, in the form of meat, eggs and dairy products.

In developing countries, maize is consumed directly and serves as staple diet for some million people. Most people regard maize as a breakfast cereal. However, in a processed form it is also found as fuel (ethanol) and Size: 1MB.

Developing herbicide-tolerant crop cultivars: (). Development and Spread of Improved Maize Varieties and Hybrids in Developing Countries. Diffusion of hybrid corn technology: The case of El Salvador.

The history of maize breeding at IITA spans nearly five decades and has generated improved open pollinated varieties (OPVs) and hybrids. The diverse agroecological production zones, each with its unique biotic or abiotic constraints, are accounted for in the cultivar development by: 1.

Save and Grow in practice maize rice wheat A guide to sustainable cereal production Improved crops and varieties Save and Grow systems use diverse, complementary developing countries around the world, describe Save and Grow farming systems in File Size: 1MB.

The following variables were hypothesized to influence the allocation of land to improved maize, either hybrids or improved open-pollinated varieties (OPVs). 6 Farm size: Farm size (X1) is an indicator of wealth and perhaps a proxy for social status and influence within a community It is expected to be positively associated with the decision to.

University supported breeding programs were especially important in developing and introducing modern hybrids (Ref Jugenheimer Hybrid Maize Breeding and Seed Production pub. By the s, companies such as Pioneer devoted to production of hybrid maize. Changing Markets and Incentives. Author: Ashok Gulati,John Dixon; Publisher: Academic Foundation ISBN: Category: Business & Economics Page: View: DOWNLOAD NOW» Outcome of collaboration between International Maize and Wheat Improvement Center, International Food Policy Research Institute, and International Fund for Agricultural Development.

Beginning from the late s, the increasing demand and diffusion of improved maize products, particularly hybrids, to areas outside of the traditional maize-belt zones, such as the savanna regions, have prompted the establishment of regional projects such as Semi-Arid Food Grain Research Development, which later became the West and Central Cited by: 1.

Maize (Zea mays) is always preferred to other crops, and it is fast becoming an industrial crop in Sub-Saharan African countries. Nigeria has been divided into low, medium, medium to high and high maize production potential groups. Traditionally, maize was mostly grown in forest ecology in Nigeria but large scale production has moved to the savanna zone, especially the Northern Guinea savanna Cited by: Save and Grow farming systems increase crop productivity and diversify food production, while simultaneously restoring and enhancing natural capital and ecosystem services.

They do so by achieving higher rates of efficiency in the use of farm inputs - including water, nutrients, energy and labour - and strengthening resilience to abiotic, biotic and economic stresses, and to climate change. Yield benefits vary by crop and environment, but some notable examples include maize hybrids developed by the International Institute for Tropical Agriculture in West and Central Africa in the ’s that by the early ’s were available with resistance to maize streak virus and out-performed open-pollinated varieties (OPVs) by 33% to 45%.

Among the crops affected by mycotoxins, maize and wheat have been subjected to the most intense efforts to develop genetic resistance in commercial cultivars. As a result, it is possible to select maize hybrids and wheat and barley varieties with partial resistance to mycotoxin-producing fungi.

However, the genetics of resistance to these fungi. The book published by IIBN highlights the importance of biotechnological innovations for sustainable development of agriculture and industry illustrated by means of case studies from growth economies and developing book focuses on (near) commercial applications of transgenic technologies in agriculture and forestry and provides a comprehensive overview of the current status of.

Over half of this impact has been attributed to maize research. Since the inception of the DTMA Project inthere have been successes in the development and dissemination of drought-tolerant maize varieties including the multiple stress-tolerant early and extra-early varieties developed under the DTMA/STMA : Baffour Badu-Apraku, M.

Fakorede. Maize and wheat science for improved livelihoods. Maize and wheat science for improved livelihoods. Maize and wheat seeds from all over the world are preserved at the CIMMYT genebank, used to bring new varieties to farmers, and backed up at the Global Seed Vault.

Capacity development. Features 18 May This little seed went to market. The Maize Genetics Conference started with a call for maize geneticists to take on one of the greatest challenges of human history – feeding the world. Marianne Bänziger of CIMMYT presented the first plenary talk, titled Stress tolerant maize Read More Stress tolerant maize for the developing world – Challenges and prospects.

This article is about the cereal grain. For other uses, see Maize (disambiguation). "Corn" redirects here. For the band, see Korn. For o. The five most promising technologies for the Wet Semi-arid Zone are (1) maize improved varieties and hybrids, (2) input intensification, (3) mechanization, (4) sorghum hybrids, and (5) improved.

An array of production technologies, from land preparation to harvesting, has been recommended for maize crop. Being non-tillering crop, optimum plant population can be achieved if suitable crop establishment techniques like method of sowing, sowing time, seed rate, seed treatment, crop geometry etc., are followed.

Weeds can be managed well either by two hoeings 15–30 days after sowing or Author: Manpreet Jaidka, Shikha Bathla, Ramanjit Kaur. Increased yield from improved wheat varieties, including increased heat and drought tolerance, has resulted in an increase in annual revenue of between USD billion and mainly for farmers and resource poor consumers in the developing world, demonstrating a staggering return on investment of (Lantican et al.

Doubled haploid (DH) is a technology used by maize breeders to dramatically reduce the time spent in developing an improved variety as well as resources required for development of inbred lines or.

Spread of small-scale food-processing facilities would also have a favourable impact on the integration of improved maize varieties into the farming system. Other areas that need policy attention are the reduction in diet diversity and micronutrient intakes observed in areas with higher levels of adoption, and the increase in welfare.

In most of East Africa, for instance, only percent of the crop is in the form of hybrids or other improved varieties, and in West Africa the percentage is even lower.

This is not unexpected. Occasional U.S. hybrids, such as NKprove productive over a wide range of conditions in Africa, but most do not. Journal of Maize Research and Development () 1(1) ISSN: (Online)/ (Print) DOI: /zenodo A review on threat of gray leaf spot disease of maize in Asia.

HarvestPlus has used two strategies to shorten the time to market for biofortified crops: 1) identifying adapted varieties with significant micronutrient content for release and/or dissemination as "fast-track" varieties, while varieties with target micronutrient content are still under development, and 2) deploying multi-location regional trials across a wide range of countries and sites to.

Among the most widely grown cereals, maize is a staple crop for over billion people in 94 LMIC providing at least 30% of food calories in these countries (Consultative Group for International Agricultural Research (CGIAR), ).Maize occupies ∼24% of farmland in Africa and the average yield stagnates at around 2 tons/hectare/year (Organization for Economic Co‐operation and Development.

The Green Revolution boosted the growth of average wheat yields to % per annum in developing countries during to However, yield growth in developing countries slipped to % per annum during the period toand then dropped to % per annum during to (Figure 5), once again falling below the population growth rate.

In countries like India, Vietnam, Indonesia, and African countries, lack of adoption of new varieties has been a major bottleneck to improved groundnut yields. PHENOTYPING TOOLS Reliable and repeatable phenotyping remains the key to the success of any crop improvement program whether following conventional or molecular breeding by: 3 Genetically Engineered Crops Through Having laid the groundwork for its approach to risk and benefit assessment, introduced the major actors operating in the sphere of governance of genetically engineered (GE) crops, and defined the terms commonly used in its report, the committee turns in this chapter to its first charge in the statement of task: an examination of the history of the.

impact pathways: 1) New maize varieties for the poor; 2) Sustainable intensification and income opportunities for the poor, and; 3) Integrated post-harvest management.

1) New maize varieties for the poor New improved maize varieties are seen as a critical vehicle by which to enhance the lives of the.Maize (Zea mays L.) is among the most widely grown crops in the world after rice (Oriza sativa L.) and wheat (Triticum aestivum L.).It forms the basis for food security in some of the world’s poorest regions in Africa, Asia, and Latin America and is produced on nearly million hectares in developing countries [].One of the major abiotic constraints of maize production is the Cited by: 1.ICRISAT is working with its partners to support the development of open seed markets and local seed companies that can supply quality seed of improved varieties at affordable prices.

The entrepreneurial spirit that is alive in sub-Saharan Africa can be harnessed to achieve this.