Effect of pollen competition and stigmatic receptivity on seed set in white clover (Trifolium repens L.)

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Type Article
Original languageEnglish
Pages (from-to)37-42
Number of pages6
JournalSexual Plant Reproduction
Issue number1
Publication statusPublished - Jul 2000
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The effect of competition between incompatible and compatible pollen grains on the seed production of white clover was studied. Stigmatic receptivity was also studied. A selection line of white clover that has red leaves was used as a pollen donor and as a genetic marker to allow determination of the pollen donor responsible for ovule fertilisation. Results show that incompatible pollen did not inhibit compatible pollen grains from fertilising ovules and producing seeds, although it did slightly impair seed yield. At temperatures of 20/10°C (day/night) stigmas of white clover remained receptive to additional pollination up to 32 h after an initial compatible pollination and 40 h after an incompatible pollination. The results imply that factors other than inadequate pollination and the self-incompatibility system are responsible for failure of white clover to attain its potential seed yield.


  • trifolium repens L., pollen competition, stigmatic receptivity, fertilisation, seed yield