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Published in Crop Sci 7:617-619 (1967)
© 1967 Crop Science Society of America
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Isogenic Analysis of Strontium-89 Accumulation in Barley1

D. C. Rasmusson and R. A. Kleese2

The effect of short segments of chromosomes on Sr-89 accumulation in barley, Hordeum vulgate L., was studied by comparing Sr-89 accumulation in pairs of isogenic lines. The members of each isogenic pair differed by segments of chromosome estimated to be less than 6 recombination units in length.

Six of the 11 chremosome segments studied influenced Sr-89 accumulation in grain, stems, or leaves of mature plants or in shoots of seedling plants. In three of the segments the marker gene that served to identify the segment appeared to effect the differential accumulation of Sr-89. The three genes were those that control hoods vs. awns, long vs. short awn, and naked vs. covered caryopsis. In addition, the chromosome segments identified by the genes controlling two vs. six rows of kernels, black vs. white lemma and pericarp, and purple vs. nonpurple lemma and pericarp had a significant effect on Sr-89 accumulation.

The study leads to the conclusion that the genetic basis for differences in Sr-89 accumulation involves a number of genes and is highly dependent on the genetic stocks involved.

Key Words: Isogenics • Hordeum vulgare L. • ion accumulation • mineral elements • barley genetics • chromosomes

1 Contribution from the Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, Minn. Paper No. 6231, Scientific Journal Series. This research was supported by the United States Atomic Energy Commission, Contract No. At(11-1)1097.

2 Professor and Associate Professor in the Department of Agronomy and Plant Genetics, University of Minnesota.

Received for publication April 12, 1967.




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