The Impact of Self-Pollination on Production of Sound Selfed Seeds : Biochemical Markers in the Population Genetics of Forest Trees

The Hague

1991

S. 143-147

8 Lit. Ang.

Bandaufführung

74912

For 11 maternal genotypes (grafted plus tree clones of Scots pine) pollen mixes were prepared with different proportions of selfing pollen (0,25,50,75 and 100%). The non-selfing pollen was a mixture of equal proportions of two constant fathers. Isozymes have been used to study the relationship between selfing rate and seed production. The proportion of sound selfed seed rose linearly with the proportion of selfing pollen over the whole range of practical interest (<50% selfing pollen). In this range the proportion of selfed seeds will be 35% of the proportion of selfing pollen: thus outcrossing pollen can be seen as three times as effective as selfing pollen. The two different unrelated pollen in the mix contributed highly unequally to the progeny. With increasing level of selfing pollen, the empty seed percentage increased and the number of filled seeds per cone decreased.