|Holland, Jim - Jim|
Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 7/31/2001
Publication Date: N/A
Citation: Interpretive Summary: The development of a new linkage map for cultivated oat has allowed scientists to further explore chromosomal regions controlling important economic traits. The information will be combined with that of previous studies to build a comprehensive trait map for oat. Some findings, such as that for seed shatter and grain protein concentration, were new and unique to this study. This trait mapping information help oat geneticists and breeders to better understand linkage relationships among important traits. For some traits, this information will be used by geneticists to derive and test markers for oat germplasm enhancement programs.
Technical Abstract: The assemblage of a molecular linkage map using an 'Ogle' / 'TAM O-301' recombinant inbred oat population has allowed us to infer map positions of several quantitative trait loci (QTL). The population was grown in six locations by year environments, and data for days to heading, plant height, lodging severity, grain yield, grain test weight, and grain oil and protein concentration were collected. Data for tertiary seed development and seed shatter severity were gathered from four locations by year environments. Initial variance analyses indicated significant effects due to entry and transgressive segregation for all traits. Simple interval analysis with NQTL software revealed at least one significant QTL for each trait. It is expected that these results and others like it will be used to build an oat QTL consensus map, and this information will be used to design marker-assisted enhancement studies for oat.