Researchers Find Overlapping QTL for Stomatal Traits and Yield in Wheat
July 13, 2016
Stomata are specialized leaf epidermal cells which facilitate CO2
uptake and water loss. Understanding the mechanisms controlling stomatal size is critical to maintain a high photosynthetic rate. Researchers from the University of Adelaide in Australia explored the genetic
variation and identified quantitative traits loci (QTL) for stomatal traits in wheat
grown under greenhouse and field conditions.
The genetics of stomatal traits was investigated using double haploid lines from a cross between Australian lines of wheat, RAC875 and Kukri. The drought tolerant line RAC875 showed small stomata in compared to Kukri. Differences were also observed for stomatal density and size. Analysis showed a negative correlation between stomatal size and density, indicating a compensatory relationship between them.
QTLs were also identified for stomatal traits on chromosomes 1A, 1B, 2B, and 7A. Some of these loci also overlap with QTLs that control kernel number per spike and yield in chromosome 7A. This suggests that stomatal traits could be a potential approach in increasing yield in wheat.
Biotech Updates is a weekly newsletter of ISAAA, a not-for-profit organization. It is distributed for free to over 22,000 subscribers worldwide to inform them about the key developments in biosciences, especially in biotechnology. Your support will help us in our mission to feed the world with knowledge. You can help by donating as little as $10.