QTL Mapping for Resistance to 1st and 2nd Generation of European Corn BorerMay 6, 2011
The European corn borer (ECB) is one of the predominant pests of maize in North America and Europe, causing extensive losses in yield. Thus, E. Orsini and colleagues at the University of Hohenheim mapped and characterized the complex traits that influence the resistance to the first (ECB1) and second (ECB2) generation of ECB and plant height using single-nucleotide polymorphism (SNP) and 88 microsatellites. A total of 144 testcross (TC) progenies of double haploid (DH) lines developed from a cross of two parental lines from the Stiff Stalk germplasm pool were tested at six different locations in the USA under both natural and artificial infestation with ECB larvae. They assessed the resistance by measuring leaf feeding and stalk breakage for ECB1 and ECB2, respectively.
Results showed that there is significant genotypic variance in all traits among the TC progenies. Heritabilities, the proportion of phenotypic variation due to genetic variation between individuals, were moderately high for stalk breakage and plant height, but only moderate for leaf feeding. Three qualitative trait loci (QTL) were found for stalk breakage, one QTL for leaf feeding, and two QTL for plant height. The QTL for leaf feeding was found in chromosomal regions adjacent to those reported for other maize germplasm, and consequently, might be used for market-assisted selection during line development in maize.
Read more at http://www.springerlink.com/content/9p4x36uj76410611/.
The Crop Biotech Update is a weekly newsletter of ISAAA, a not-for-profit organization. The CBU is distributed for free to over 23,000 subscribers worldwide to inform them about the key developments in biosciences, especially in agricultural biotechnology. Your support will help us in our mission to feed the world with knowledge. You can help by donating as little as $10.
See more articles:
News from Around the World
- Global Initiative for Food and Ag Policy
- Need to Address Issues Regarding Benefit Sharing in ITPGRFA
- Restoration Seed Banks Proposed
- Seed Conditioning Facility in South Africa
- Soybean and Sunflower in Ethiopia?
- Biotech Crops in South Africa
- Atlantic Food Summit Panel Highlights Biotechnology
- Delivering Nutritionally Enhanced Sorghum to Africa
- Formidable Fungal Force Counters Biofuel Plant Pathogens
- Improving Wheat and Durum Varieties for Western Canadian Farmers
- One Corn Gene Provides Resistance to Multiple Diseases
- Selaginella Genome Sequence Maybe Key to Plant Evolutionary Puzzle
- Scientists Conclude Origin of Rice
- Plants Duplicate Chromosomes to Adapt
- ISAAA Publishes "Bt Cotton in India: A Multipurpose Crop"
- China Launches Agri-Science and Technology Program
- CAU-Purdue Research Collaboration Forged
- Filipino Farmers and Key Stakeholders Participate in Biotech Communication Workshop
- Filipino Farmers Ratify Resolution Supporting Bt Eggplant Trials
- INRA's Metaprogrammes for Global Agronomic Research
- QTL Mapping for Resistance to 1st and 2nd Generation of European Corn Borer
- Transgenic Production of Arachidonic Acid in Oilseeds
- Distribution of Genes Controlling Fruit Shape in the Tomato Germplasm and the Relationship to Fruit Shape Diversity
Beyond Crop Biotech
- GM Mosquitoes to Combat Malaria
- Japanese Scientists Engineer Retina
- France – Annual Conference of the National Federation of Farmers
- International Conference on Agricultural, Biosystems, Biotechnology and Biological Engineering
- PBS Publication on Biosafety
Read the latest:
- Crop Biotech Update (December 1, 2022)
- Genome Editing Supplement (November 23, 2022)
- Gene Drive Supplement (December 1, 2022)
Subscribe to CBU: