Knowledge Center Catalog

Local cover image
Local cover image

Confirming quantitative trait loci for aflatoxin resistance from Mp313E in different genetic backgrounds

By: Contributor(s): Material type: ArticleArticleLanguage: English Publication details: Dordrecht (Netherlands) : Springer, 2013.ISSN:
  • 1572-9788 (Online)
  • 1380-3743
Subject(s): Online resources: In: Molecular Breeding v. 32, no. 1, p. 15-26Summary: The fungus Aspergillus flavus (Link:Fr) causes ear rot of maize (Zea mays L.) and produces the toxic metabolic product aflatoxin. One particularly effective method of controlling the fungus is via host plant resistance, but while several resistant breeding lines have been identified, transferring the resistance genes from these lines into elite cultivars has been less effective than needed. A high number of genes involved with resistance, each with a small effect, and some only found under certain environmental conditions, has hampered resistance breeding. The identification of markers linked to genomic regions associated with resistance would aid in this effort. The goals of this study were to identify and characterize quantitative trait loci (QTL) conferring resistance to aflatoxin accumulation from resistant maize donor Mp313E in a background of the susceptible inbred line Va35; to compare them to the QTL identified from Mp313E in a background of B73; and to test the stability of the QTL identified in Mp313E × Va35 in multiple environments by remapping the phenotypic tails of the Mp313E × Va35 mapping population in new locations. Twenty different QTL were found in this study, 11 of which were also found in different environments using the phenotypic tail subset mapping population, and five of which were likely the same as those reported in the Mp313E × B73 mapping population. This indicates that many of the QTL are stable over the environments and genetic backgrounds tested, which will make them more valuable in breeding efforts.
Tags from this library: No tags from this library for this title. Log in to add tags.
Star ratings
    Average rating: 0.0 (0 votes)
Holdings
Item type Current library Collection Call number Status Date due Barcode Item holds
Article CIMMYT Knowledge Center: John Woolston Library CIMMYT Staff Publications Collection CIS-7153 (Browse shelf(Opens below)) Available
Total holds: 0

Peer review

Peer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=1380-3743

The fungus Aspergillus flavus (Link:Fr) causes ear rot of maize (Zea mays L.) and produces the toxic metabolic product aflatoxin. One particularly effective method of controlling the fungus is via host plant resistance, but while several resistant breeding lines have been identified, transferring the resistance genes from these lines into elite cultivars has been less effective than needed. A high number of genes involved with resistance, each with a small effect, and some only found under certain environmental conditions, has hampered resistance breeding. The identification of markers linked to genomic regions associated with resistance would aid in this effort. The goals of this study were to identify and characterize quantitative trait loci (QTL) conferring resistance to aflatoxin accumulation from resistant maize donor Mp313E in a background of the susceptible inbred line Va35; to compare them to the QTL identified from Mp313E in a background of B73; and to test the stability of the QTL identified in Mp313E × Va35 in multiple environments by remapping the phenotypic tails of the Mp313E × Va35 mapping population in new locations. Twenty different QTL were found in this study, 11 of which were also found in different environments using the phenotypic tail subset mapping population, and five of which were likely the same as those reported in the Mp313E × B73 mapping population. This indicates that many of the QTL are stable over the environments and genetic backgrounds tested, which will make them more valuable in breeding efforts.

Genetic Resources Program

Text in English

CIMMYT Informa No. 1838

INT3242

CIMMYT Staff Publications Collection

Click on an image to view it in the image viewer

Local cover image

International Maize and Wheat Improvement Center (CIMMYT) © Copyright 2021.
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