Description - Oat Maize Addition (OMA) lines are plants with one or more of the 10 chromosomes of maize (Zea mays L.) added to a complete genome of oat (Avena sativa L., 2n = 6x = 42). OMAs are produced from crosses between oat as the female and maize as the male parent with partial elimination of maize chromosomes occurring during development of an in vitro rescued embryo. The progeny with a complete haploid set of 21 oat chromosomes and one or more maize chromosomes are termed OMAs. Plants with double the chromosome number, which occurs upon self-pollination, are also referred to as OMAs, but should be called oat-maize disomic addition lines. OMAs with each of the ten maize chromosomes added individually to oat have been produced using various maize parents, including inbreds B73 and Mo17 and the hybrid sweetcorn Seneca 60, and various oat parents as recipients, primarily cultivars Starter and Sun II. DNA and/or seed of OMAs available for distribution for various research purposes along with OMA plant phenotypes are listed below. Detailed descriptions of OMA generation and uses in research can be found in the "References" section.
Phenotypes of Seneca 60 OMAs (pictures) - see Kynast et al., Plant Physiol. 125,1216-1227, 2001
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B73 and Mo17 Lines Available
