Preliminary Observations on a New Trait, Opposite First Compound Leaf, in Glycine Max, (Soybean)
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Citation:The Ohio Journal of Science. v80, n3 (May, 1980), 122-125
A new trait in Strain T219 of Glycine max (L.) Merrill, opposite first compound leaves (Opp) followed by alternate subsequent compound leaves as opposed to the usual exclusively alternate compound leaves (NOpp) was found. This strain segregated in a 1:2:1 ratio for dark green: light green: yellow at the yn locus. In the original sowing of 371 seeds, a 3:1 ratio of NOpp: Opp was observed. Following 4 generations of selection in which only Opps from the seed source with the highest frequency of Opp were raised to maturity, the frequency of Opp decreased from 42% Opp in the PI generation to 2.2% Opp in the S4 generation. In a parallel selection with the same material, against Opp, the frequency of Opp consistently decreased from 25 to 0%. Water at 47 °C applies to dormant seeds for 2 hr before sowing modified dormant, but seed storage for 2 years had no noticeable effect on, the frequency of Opp.
Author Institution: Department of Genetics, The Ohio State University
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