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Pioneer and mentor pollen effects

According to Dutch research ( Visser and Verhaegh, 1980 ), the application of compatible pollen twice with a one to two day interval between applications, could stimulate the activity of the pollen applied on the second occasion. This was thought to be …

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Pollen compatibility

Most diploid apple varieties are cross compatible (i.e. self-incompatible). This means that they will not set fruit with their own pollen in most environmental conditions. They require the viable pollen of another variety to be transferred to their …

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Dormancy and synchrony of flowering times

For effective transfer of viable pollen its growth and the fertilisation of the ovule, it is essential that, where cross-pollination is required, the two varieties flower at approximately the same period. At the very least there needs to be an overlap of …

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Suitable pollinating varieties

Most commercial varieties of apple are self-sterile and require pollen from another variety in order to ensure adequate fruit set. Self-fertile clones of Cox are available and a few other varieties show a level of self-fertility, if given favourable …

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Pollen quality (viability)

It is essential that the pollen grains moved by insect vectors, wind or artificially by man, between the pollen donor (pollinating variety) and the main commercial variety, remain viable and capable of germination and growth down the style into the ovary …

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Production of adequate quantities of viable pollen

Pollinating varieties for use in orchards of self-sterile varieties of apple must produce adequate quantities of viable pollen . The quantities produced are influenced by: Scion varieties and their production of viable pollen. Rootstock influence on the …

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