Scientists Conduct Multigene Engineering to Improve Maize StarchJuly 10, 2013
Scientist Lili Jiang from Northeast Normal University in China, and colleagues aimed to improve the starch content and composition of maize. They used multigene engineering approach to target the complex traits involved. Genes Bt2, Sh2, Sh1 and GbssIIa (involved in the activity of sucrose synthase, AGPase and granule-bound starch synthase) were overexpressed while SbeI and SbeIIb were silenced through RNA interference to reduce the activity of starch branching enzyme.
Results showed that the maize plants expressing all six genes and the selectable marker had significant increase (~3-8%) in the endosperm starch content and ~38-44% increase in the proportion of amylose. Improvements in other agronomic traits were also observed such as increase in grain and ear weight, and enlargement of kernels with healthier appearance, which reflects the improved starch structure inside the kernels.
Based on the findings, multigene engineering is an effective approach to modify the starch biosynthesis pathway, leading to improved quality and quantity of maize starch and other agronomic traits.
Read the abstract published at Transgenic Research: http://link.springer.com/article/10.1007/s11248-013-9717-4.
The Crop Biotech Update is a weekly newsletter of ISAAA, a non-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
- 2013 Global Food Security Index Shows Resilience in the Face of Challenges
- Scientists Compare Genomes of Wild and Domestic Tomato
- Africabio CEO Says GM Foods in South Africa is Safe
- International Leaders Attend High Level Meeting for Africa's Sustainable Agriculture
- Gates Foundation to Build Biotech Lab in Nigeria
- Geneticist Urges Mining the World's Seed Banks to Feed Tomorrow's Population
- Roger Beachy: "I Got into Biotech Because I Wanted to Reduce the Use of Pesticides"
- ICRISAT Releases Iron-biofortified Pearl Millet
- Bosan: GM Crops Answer to Food Insecurity
- APEC Seeks to Widen Use of Agri-biotech for Food Security
- Lee Foundation Funds Breeding of New Rice Scientists
- Scientists to Develop Drought Tolerant Potatoes for Central Asia
- New Study Provides Insights for Further Understanding of Plant's Metabolic Control
- Scientists Discover Gene Controlling Multi-Herbicide Resistance
- UK to Build World's First 'Library' of Potato Mutants
- Researchers Identify Fungus' Mechanism to Hinder Plant Defense
- Sustainable Intensification to Help Increase Food Production
- Scientists Conduct Multigene Engineering to Improve Maize Starch
Beyond Crop Biotech
- Researchers Discover Second Molecular Door for Insecticide in Mosquitoes
- REDBIO Argentina 2013
Subscribe to CBU: