In this paper, 10 mutations conditioning the appearance of defective, miniature or collapsed endosperm, but with normal sporophyte development, were considered. Homozygous mutant kernels have reduced grain weight, kernel size, density and, in some of these, higher than normal seed protein content. The mutant loci were integrated into a highresolution genetic map in order to associate them to specific genes. We have placed 1167 AFLP markers on a consensus map using IBM2 as a backbone and reaching an average of 1 marker every 1.9 cM. We have identified AFLP markers linked to all individual mutant alleles. BSA was adopted to screen the largest possible number of primer combinations on homozygous F3 mutant and wild type plants. The ten mutant loci are linked to the closest AFLP or SSR markers with distances ranging from 0 to 17.9 cM. The genes we have defined by the existence of mendelian mutants can now be considered good candidates for testing the association to QT loci.
|Titolo:||The integration of mutant loci affecting maize endosperm development in a dense genetic map using an AFLP-based procedure|
SALAMINI, FRANCESCO (Penultimo)
|Parole Chiave:||Bulked segregant analysis; Integrated molecular maps; Viable endosperm mutants; Zea mays|
|Settore Scientifico Disciplinare:||Settore BIO/18 - Genetica|
|Data di pubblicazione:||2008|
|Digital Object Identifier (DOI):||10.1007/s11032-008-9196-0|
|Appare nelle tipologie:||01 - Articolo su periodico|