Genetic analysis of opaque2 modifier loci in quality protein maize

in
Holding, DR, Hunter BG, Chung T, Gibbon BC, Ford CF, Bharti AK, Messing J, Hamaker BR, Larkins BA.  2008.  

Journal:

Theor Appl Genet

Volume Number:

117

Pages:

157-70

Abstract:

Quality protein maize (QPM) was created by selecting genetic modifiers that convert the starchy endosperm of an opaque2 (o2) mutant to a hard, vitreous phenotype. Genetic analysis has shown that there are multiple, unlinked o2 modifiers (Opm), but their identity and mode of action are unknown. Using two independently developed QPM lines, we mapped several major Opm QTLs to chromosomes 1, 7 and 9. A microarray hybridization performed with RNA obtained from true breeding o2 progeny with vitreous and opaque kernel phenotypes identified a small group of differentially expressed genes, some of which map at or near the Opm QTLs. Several of the genes are associated with ethylene and ABA signaling and suggest a potential linkage of o2 endosperm modification with programmed cell death.

Notes:

Holding, David RHunter, Brenda GChung, TaijoonGibbon, Bryan CFord, Clark FBharti, Arvind KMessing, JoachimHamaker, Bruce RLarkins, Brian AResearch Support, U.S. Gov't, Non-P.H.S.GermanyTAG. Theoretical and applied genetics. Theoretische und angewandte GenetikTheor Appl Genet. 2008 Jul;117(2):157-70. Epub 2008 Apr 22.

Related External URL:

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18427771
Citation:
Holding, DR, Hunter BG, Chung T, Gibbon BC, Ford CF, Bharti AK, Messing J, Hamaker BR, Larkins BA.  2008.  Genetic analysis of opaque2 modifier loci in quality protein maize. Theor Appl Genet. 117:157-70.