Submitted to: Maize Genetics Conference Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 3/17/2000
Publication Date: 3/17/2000
Citation: BUSHMAN, B.S., SZALMA, S.J., MCMULLEN, M.D., BERHOW, M.A., HOUCHINS, K.E., SCHULTZ, L., SNOOK, M.E. GENETICS OF CHLOROGENIC ACID AND MAYSIN SYNTHESIS IN MAIZE SILKS. MAIZE GENETICS CONFERENCE. 2000. ABSTRACT. P. 117.
Technical Abstract: Chlorogenic acid and maysin are products of the phenylpropanoid and flavonoid pathways, respectively. Our laboratory is studying the genetic basis of synthesis of these compounds as a model system for understanding the genetic control of biochemical pathways. In this poster, we will summarize results for QTL analyses of three F2 populations; A619 x Mp708, W23c2/whp1/in1 x Mp708, and W23c2/whp1/in1 x NC7A. Inbred line Mp708 was chosen as a parent of two of the populations based on the very high levels of chlorogenic acid present in silk. Our analyses indicate the high level of chlorogenic acid in Mp708 is primarily due to positive alleles of two two major QTLs, one from the p1 region of chromosome 1 and one from chromosome 2. W23c2/whp1/in1 was chosen as a parent to study the role of the chalcone synthase genes in maysin synthesis and to study the interconnectedness of the phenylpropanoid and flavonoid pathways. NC7A was schosen as a parent because it accumulates apimaysin, a mono-hydroxylated form of maysin. The population with NC7A will allow us to examine differential synthesis of maysin and apimaysin. Together, the three populations address many questions about regulation of these biochemical pathways.