Genetic improvement of the coconut palm - Prepotency studies
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2007-02
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A comparative study of two growth characters viz., collar girth and leaf production at the fifth month from germination of 1190 open pollinated progenies of 43 high yielding mother palms and 224 open pollinated progenies of 10 high yielding mother palms has indicated that the progenies of only five palms are superior to those of others in the nursery. In these palms 60% and above of their progenies have growth characters above the general mean of 1414 progenies of 53 palms. Three of these mother palms come under the first and third groups and are stable high yielders, yielding more than 80 nuts per palm per year and give a copra outturn of more than 15 kg per palm per year. The fourth one belongs to the second group, the copra outturn of which is low, and hence not considered. The fifth one belongs to the second lot of the fifth group of stable high yielders. The growth of the progenies of the selected four palms at the fifth month from the time of germination is in general more vigorous irrespective of the months of harvest and germination when compared to others. These palms which show a high rate of transmission of growth characters to their progenies can be considered as likely prepotents. In another study, of 146 F2 open pollinated progenies derived from three high yielding prepotent palms indicated that prepotency is not transmitted to all the open pollinated second generation progenies.
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J.Plantn.Crops 1985 v-13 i-2 p-125-131