Genome Wide Association Studies Targeting Adaptive Traits for Low Phosphorus Soils in West African Sorghum
O. Marcus Olatoye1, Willmar L. Leiser1, Bettina I.G. Haussmann1, H. Frederick W. Rattunde2, Günter Neumann3, Markus Weinmann3, Heiko K. Parzies1
1University of Hohenheim, Inst. of Plant Breeding, Seed Science and Population Genetics, Germany
An important impediment to agricultural crop production in sub-Saharan Africa is low phosphorus (P) availability in soils which affects about 75% of the available agricultural land. Sorghum (Sorghum bicolor L. Moench) is one of the most widely grown crops in the region with the grain being important for food security and the stover increasingly used for livestock feed. Plants possess many mechanisms for adaptation to low P availability, including physiological traits, root morphology and mycorrhizal symbiotic relationships. Understanding the genetic basis and role of these traits is important for their consideration in breeding programmes targeting improved P acquisition in P deficient soils. Objective of the present study was therefore to dissect the genetic basis of sorghum adaptation to low P soils using genome wide association mapping. Association mapping is a powerful technique for high resolution mapping of loci underlying quantitative traits.
Keywords: Adaptation traits, association studies, breeding, low phosphorus soils, mycorrhiza, sorghum
Contact Address: O. Marcus Olatoye, University of Hohenheim, Inst. of Plant Breeding, Seed Science and Population Genetics, Fruwirthstrasse 21, 70599 Stuttgart, Germany, e-mail: marcus-olatoyehotmail.com