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Pollen competition does not affect the sucess of self-pollination in Eucalyptus globulus (Myrtaceae)


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Pound, LM, Patterson, B, Wallwork, MAB, Potts, BM and Sedgley, M 2003 , 'Pollen competition does not affect the sucess of self-pollination in Eucalyptus globulus (Myrtaceae)' , Australian Journal of Botany, vol. 51, no. 2 , pp. 189-195 , doi: 10.1071/BT02082.

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This study investigated whether pollen competition favours cross- over self-pollination in Eucalyptus globulus Labill. ssp. globulus. Controlled pollinations with self-pollen, cross-pollen and a mixture of self- and cross-pollen were conducted on three partially self-incompatible trees. The paternity of individual seeds resulting from mixed pollination was determined by isozyme analysis. No evidence for pollen competition was found. Instead, seed paternity reflected the level of self-incompatibility of each tree as determined by separate self- and cross-pollinations. Furthermore, the number of seeds set per capsule following mixed pollination was significantly less than that following cross-pollination in the two least self-compatible trees. These results suggest that both self- and cross-pollen tubes reach ovules following mixed pollination and that a late-acting self-incompatibility mechanism operates to abort a certain proportion of self-penetrated ovules.

Item Type: Article
Authors/Creators:Pound, LM and Patterson, B and Wallwork, MAB and Potts, BM and Sedgley, M
Journal or Publication Title: Australian Journal of Botany
ISSN: 0067-1924
DOI / ID Number: 10.1071/BT02082
Additional Information:

BM Potts. Copyright © 2003 CSIRO

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