Submitted to: Maize Genetics Conference Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: January 31, 2012
Publication Date: March 15, 2012
Citation: Chen, J., Mcmullen, M.D., Burke, J.J., Xu, W., Burow, G.B. 2012. Mapping QTLs for heat tolerance traits in maize using NAM population [abstract]. Maize Genetics Conference Abstracts. p. 154. Technical Abstract: As global climate change becomes inevitable, the sustainability of agricultural production in U.S. and worldwide faces serious threat from extreme weather conditions, such as drought and high temperature (heat stress). Heat and drought stresses occurred during maize growing season in 2011 on the U.S. High Plains has caused severe damage to maize developing leaves (leaf firing) and reproductive tissues (tassel blasting, delayer silk emerging etc) and resulting in reduction in pollen production, kernel numbers, and total grain yield. Understanding high temperature adaptation mechanisms in maize plants is crucial to the success of developing high temperature tolerant hybrids/varieties. However, little is known about the mechanisms of high temperature tolerance in maize. To dissect the genetic control of heat tolerance in maize, 2 RIL populations from NAMs mapping population were planted in 2011 in triplicates and heat tolerance traits were evaluated at different developmental stages. Genetic analysis suggests several genetic traits contributing to the heat tolerance in field-grown maize. QTLs for heat tolerance traits have been indicated.