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ARS Home » Midwest Area » St. Paul, Minnesota » Plant Science Research » Research » Publications at this Location » Publication #71079
Title: ANALYSIS OF KERNEL MORPHOLOGY IN CULTIVATED OAT (AVENA SATIVA, 2N=6X=42)

Author
item KIANIAN, SHAHRYAR - UNIVERSITY OF MINNESOTA
item PHILLIPS, RONALD - UNIVERSITY OF MINNESOTA
item Rines, Howard
item FULCHER, R - UNIVERSITY OF MINNESOTA
item STUTHMAN, DEON - UNIVERSITY OF MINNESOTA

Submitted to: Oat International Conference Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: 8/6/1996
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Understanding the basic genetic factors which influence kernel morphology traits in oat is desirable in breeding to improve the yield and usefulness of the final product. This report describes the identification of quantitative trait loci (QTLs) which consistently influence physical properties of oat kernels produced in various environments and years. Seventy-one F6:7 recombinant inbred lines (RILs) derived from the cross of A. byzantina cv. Kanota and A. sativa cv. Ogle were used for the construction of a RFLP map and the initial QTL analysis. We then expanded the analysis to include 63 additional RILs from the Kanota x Ogle population as well as 139 RILs from a second population derived from a Kanota x Marion cross. Physical measurements were made using a Digital Image Analysis (DIA) system. Both the Mapmaker QTL computer program and single factor ANOVA were used in the QTL analysis. Regions which showed consistent significant associations over years and environments were deeme significant. A high correlation was obtained among measurements of morphological traits using DIA from such varied locations as New Zealand, Idaho, and Minnesota. These traits appear to be controlled by a few genes which are not drastically influenced by the environment. Two genomic regions, one for area and one for plumpness of kernels, showed a significant association with measurements of these two traits from all years/locations. Other genomic regions were identified which showed significant associations with area, mean length (Dmax), mean width (Dmin), plumpness (Fshape) and % groat in at least three or four out of the five environments tested. We are now confirming these results using other populations.