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Reproductive Biology of Several Bromegrasses (Bromus): Breeding System, Pattern of Fruit Maturation, and Seed Set

Mark J. McKone
American Journal of Botany
Vol. 72, No. 9 (Sep., 1985), pp. 1334-1339
Stable URL: http://www.jstor.org/stable/2443505
Page Count: 6
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Reproductive Biology of Several Bromegrasses (Bromus): Breeding System, Pattern of Fruit Maturation, and Seed Set
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Abstract

Five species of Bromus were tested for self-fertility when bagged. Bromus inermis was self-incompatible. Bromus tectorum, B. kalmii, B. ciliatus, and B. latiglumis were capable of self-fertilization. Further evidence from flowering behavior suggested that B. tectorum almost always self-pollinated and that the remaining self-fertile species sometimes outcrossed. Florets in different positions on a spikelet varied in the proportion that set seed. Open-pollinated B. inermis plants had lower seed set than the self-fertile species, in agreement with the pattern in a variety of hermaphroditic plants.

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