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Estimation of mating-compatibility of the wild service tree (Sorbus torminalis L. Crantz) by observing pollen tube germination

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Wojciechowski A., Bednorz B. L., Bednorz L.

Journal of Applied Genetics

2000

vol. 41

issue 4

253-258

Cross-compatbility and self-compatbility in trees of Sorbus torminalis (L.) Crantz were evaluated. Degree of mating-compatibility between three trees was determined by means of fluorescence microscope. Self-compatibility evaluated on the basis of the pollen tube germination index showed that one tree is fully self-incompatible and the other two are self-compatible. Observations of pollen tube germination showed full cross-compatibility between trees under investigation.

Differential male mating frequency depending on male number in the migratory locust

100%

Castro A. J., Pardo M. C., Lopez-Leon M. D., Cabrero J., Camacho J. P.

Folia Biologica

1998

vol. 46

119-122

Experimental crosses with and without risk of sperm competition were performed in the locust Locusta migratoria, an orthopteran species with a certain degree of first male sperm precedence. The results showed that first mating males perform a significantly higher number of matings than non-first ones, which is paralleled to a shorter remating period. Possible explanations of this differential male mating frequency are discussed in the light of current hypotheses on sexual selection theory.

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1 Folia Biologica

1 Journal of Applied Genetics

1 2000

1 1998

1 Bednorz B. L.

1 Bednorz L.

1 Cabrero J.

1 Camacho J. P.

1 Castro A. J.

1 Lopez-Leon M. D.

1 Pardo M. C.

1 Wojciechowski A.

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Estimation of mating-compatibility of the wild service tree (Sorbus torminalis L. Crantz) by observing pollen tube germination

Differential male mating frequency depending on male number in the migratory locust