Normal view MARC view ISBD view

Maize germplasm enhancement, improvement and development in China

By: Zhang, S.H | Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico) | Arnel R. Hallauer International Symposium on Plant Breeding Mexico, D.F. (Mexico) 17-22 Aug 2003.
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: Mexico, DF (Mexico) CIMMYT : 2003Description: p. 162-163.Subject(s): Development plans | Germplasm | Maize | Food security | Genetic resources | Hybrids AGROVOC | Plant breeding AGROVOCDDC classification: 631.53 Summary: The first limiting factor influencing maize breeding efforts in China is the lack of genetic resources. At the same time, the genetic background of hybrids is becoming increasingly narrower. Only five predominant hybrids cover 53% of total maize acreage, and in 1995, more than 61% of maize area relied heavily on just five lines: Mo17, Ye478, Huangzao 4, Dan 340, and E28 (Zhang et al.l998a). Most of the lines used have been derived from only four germplasm sources. More than 73% of the lines were recycled from single crosses, three-ways and synthetics (Peng et al.l994). There is a need to exploit germplasm from the center of diversity of maize. Tropical and subtropical germplasm developed by CIMMYT has been introduced and utilized by a number of national agricultural research programs around the world. These materials possess large genetic diversity, and therefore can broaden the genetic base of hybrid maize breeding, preventing genetic vulnerability and enhancing the level of heterosis in temperate zones. The CAAS initiated a project of maize germplasm enhancement, improvement and development in l995, which was financed by the Ministry of Agriculture in l996,l999 and 2003. Maize pools and populations were introduced to broaden the genetic base of hybrid maize breeding and develop new lines with higher combining ability and hybrids with superior performance and resistance to diseases and abiotic stresses. Germplasm enhancement is the prerequisite, population improvement the key strategy , and development of new lines and hybrids the end point of this project.Collection: CIMMYT Publications Collection
Tags from this library: No tags from this library for this title. Log in to add tags.
    average rating: 0.0 (0 votes)
Item type Current location Collection Call number Copy number Status Date due Barcode Item holds
Conference proceedings CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

CIMMYT Publications Collection 631.53 BOO (Browse shelf) 1 Available 1Y632399
Total holds: 0

The first limiting factor influencing maize breeding efforts in China is the lack of genetic resources. At the same time, the genetic background of hybrids is becoming increasingly narrower. Only five predominant hybrids cover 53% of total maize acreage, and in 1995, more than 61% of maize area relied heavily on just five lines: Mo17, Ye478, Huangzao 4, Dan 340, and E28 (Zhang et al.l998a). Most of the lines used have been derived from only four germplasm sources. More than 73% of the lines were recycled from single crosses, three-ways and synthetics (Peng et al.l994). There is a need to exploit germplasm from the center of diversity of maize. Tropical and subtropical germplasm developed by CIMMYT has been introduced and utilized by a number of national agricultural research programs around the world. These materials possess large genetic diversity, and therefore can broaden the genetic base of hybrid maize breeding, preventing genetic vulnerability and enhancing the level of heterosis in temperate zones. The CAAS initiated a project of maize germplasm enhancement, improvement and development in l995, which was financed by the Ministry of Agriculture in l996,l999 and 2003. Maize pools and populations were introduced to broaden the genetic base of hybrid maize breeding and develop new lines with higher combining ability and hybrids with superior performance and resistance to diseases and abiotic stresses. Germplasm enhancement is the prerequisite, population improvement the key strategy , and development of new lines and hybrids the end point of this project.

English

0309|AGRIS 0301|AL-Maize Program

Juan Carlos Mendieta

CIMMYT Publications Collection

There are no comments for this item.

Log in to your account to post a comment.
baner

International Maize and Wheat Improvement Center (CIMMYT) © Copyright 2015. Carretera México-Veracruz. Km. 45, El Batán, Texcoco, México, C.P. 56237.
If you have any question, please contact us at CIMMYT-Knowledge-Center@cgiar.org

Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT) © Copyright 2015. Carretera México-Veracruz. Km. 45, El Batán, Texcoco, México, C.P. 56237.
Si tiene cualquier pregunta, contáctenos a CIMMYT-Knowledge-Center@cgiar.org