Abstract
The overlap of gametophytic and sporophytic gene expression in barley was studied by means of enzyme electrophoresis. Of the isozymes found, 60% were expressed in both gametophyte and sporophyte, 30% were sporophyte specific, and 10% were gametophyte specific. A considerable amount of the barley genome is thus potentially amenable to gametophytic selection. The estimated sizes of the common, sporophytic and gametophytic domains in barley gene expression correspond with the estimates obtained in other plant species.
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