Selection to Modify Sugar Content of Soybean Seeds1
- S. J. Openshaw and
- H. H. Hadley2
The objectives of this study were to investigate the inheritance of sugar concentration in soybean [Glycine max (L.) Merr.] seeds and the effect of selection for that trait on protein and oil concentration, weight, and yield of seeds. We studied the F2, F3, and F4 generations of one cross and the F2 and F3 of another. Heritability estimates of sugar concentration based on parent-progeny regressions were 0.38 and 0.14 when selection was based on individual F2 plants and 0.69 when selection was based on F3 progeny means. The values agreed well with estimates based on variance components and with realized heritabilities. In one cross, realized heritabilities were greater for increased than for decreased sugar. There was no indication of genotype × year interaction for sugar content. Sugar was positively associated with oil and negatively associated with protein and the sum of oil + protein. In some generations, low sugar was associated with decreased yield.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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