Evaluation of the Afila-Tendriled Acacia (afaf-tactac) Pea Foliage Type under Minimal Competition
- Irwin L. Goldman and
- Earl T. Gritton
The afila (af) and tendriled-acacia (toe) genes condition structural modifications of the pea (Pisum sativum L.) leaf. The of gene replaces leaflets with tendrils and tac restores small leaflets to the tendrils of of plants. The agronomic performance of plants carrying tac in combination with of is unknown. Therefore, the objective of this research was to evaluate a near-isogenic set of three foliage types: normal (AfAf-TacTac), afila (afaf-TocToc), and afila-tendriled acacia (afaf-tactac) in three genetic backgrounds. The evaluation was conducted under minimally competitive conditions on widely spaced wire trellises in order to allow for maximal foliage expression. Averaged across genetic backgrounds, tac increased the total foliage area of afaf-tactac plants over afaf-TacTac plants by 37%. Green pea yield did not differ significantly among the three foliage types. Dry seed yield at afaf-tactac plants was significantly higher than afaf-TacTac plants and equal to AfAf-TacTac plants. Expression of the tac gene varied significantly with genetic background. The afaf-tactac combination in the latest maturing background exhibited the largest increases in yield and yield components over its constituent foliage types.
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