Genetic Male Sterility in Sesame: Reproductive Characteristics and Possible Use in Hybrid Seed Production1
- H. Elg. Osman and
- D. M. Yermanos2
Male-sterile plants, producing nonviable pollen, were recovered from a Venezuelan seed stock of sesame (Sesamum indicum L.). Grosses between these plants and male-fertile cultivars produced a proportion of F2 segregants that were also male-sterile. Seed set on male-sterile plants following hand pollinations with normal pollen was high indicating that these plants were female-fertile. Greenish anther color at pollen dehiscence distinguished male-sterile from male-fertile plants, the latter having whitish anthers. Microscopic examinations revealed that sterile anthers had no endothecium and that their pollen lacked exine and had no definite wall surface structure. Observations on flower morphology of F2 plants indicated that the male-sterility trait is stable, easily maintained under greenhouse and open field conditions and positively recognizable 3 to 4 days before anthesis. The male-sterility described here can be used for commercial hybrid seed production which could lead to major increases of sesame yield per hectare.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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