Seed set of ulluco (Ullucus tuberosus Loz.). Variation between clones and enhancement of seed production through the application of plant growth regulators |
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| Authors: | Leena Pietilä Paula Jokela |
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| Institution: | (1) Department of Biology, University of Turku, SF-20500 Turku, Finland |
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| Abstract: | Summary Ulluco, Ullucus tuberosus, is a tuber crop plant with a reduced ability to produce botanical seed. This paper discusses problems related to the botanical seed set of ulluco. Ten clones of this species were studied, and the number of seeds per plant was recorded. Enhancement of seed production was attempted by the application of three growth regulators; gibberellic acid, CCC, and a synthetic cytokinin, 6-benzylamine purine. Seed set ability was shown to vary between the clones, and the application of plant growth regulators did not enhance seed production. Variation in fruit weight was observed. Because of genetic variation between clones in their ability to set seed, it is proposed that there is a possibility of breeding ulluco using botanical seeds. However, methods for improving the yield of botanical seed need to be developed. |
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| Keywords: | Ullucus tuberosus ulluco seed set clone plant growth regulator gibberellic acid synthetic cytokinin CCC breeding |
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