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Role of the Male Gametophyte in Dallisgrass Reproduction¹

Synopsis: Pollination is necessary for seed set in common and yellow-anthered dallisgrass. Although common has a high percentage of aborted pollen, there appears to be enough functional pollen for good seed set. Growth of pollen tubes into the ovule of common and yellow-anthered dallisgrass is a prerequisite for endosperm formation. Pollination is not essential for embryogenesis in common but is necessary in the yellow-anthered type.

² Assistant Professor, Kansas State University, Hays, Kansas, formerly Graduate Assistant, A & M College of Texas, and Professor of Agronomy, Texas Agr. Exp. Sta., College Station, Texas, respectively. The authors gratefully acknowledge the assistance of Charles LaMotte and E. C. Bashaw in conducting the study and preparing the manuscript and of the Crops Research Division for the use of laboratory equipment and supplies.

Received for publication June 29, 1959.