The effect of gibberellic acid on fruit and seed set in crosses of garden and winter hardy Rosa accessions |
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| Authors: | Ian Ogilvie Daniel Cloutier Neville Arnold Perry Y Jui |
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| Institution: | (1) Research Branch, Experimental Farm, Agriculture Canada, P.O. Box 3398, J0K 1G0 L'Assomption, Québec, Canada;(2) Statistical Research Section, Research Program Service, K1A 0C6 Ottawa, Canada |
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| Abstract: | Summary The effect of gibberellic acid (GA3) was studied on a wide range of crosses between various garden roses and two hardy breeding lines. Although there were fewer seeds per fruit, fruit set was higher in most crosses when GA3 was applied to the stigma at the rate of 250 ppm ten days after pollination. However, higher fruit set did not result in more seeds per pollination for many crosses and seemed to be related to the degree of male parentage. Both parents used had a major effect on pollination success. Recently developed Rosa cultivars have a narrow genetic base and the use of distantly related cultivars as parents would possibly give a high seed set and greater numbers of progeny.Contribution No. 335/90.08.01R, Experimental Farm, L'Assomption; Contribution No. Ro 44, Research Program Service, Ottawa. |
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| Keywords: | Rosa rose fruit set gibberellic acid pollination seed set |
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