Outcrossing in the Ryegrass (Lolium spp.) as Determined by Fluorescence Tests

Copeland, L. O.; Hardin, E. E.

Outcrossing in the Ryegrass (Lolium spp.) as Determined by Fluorescence Tests

1970

Copeland, L. O. | Hardin, E. E.

Studies were conducted to determine the amount and distance of outcrossing between fluorescent and nonfluorescent strains of ryegrass. Both experimental spaced-plant conditions and grower seed fields were investigated. There was substantially less crossing among plants grown in seed fields than in plots of spaced plants. Beyond 6 m from the border, outcrossing became negligible between all cultivars tested. Beyond 12 m from the border there was no evidence of crossing.

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