Methods for evaluating fruit characters and incorporation in a final index in the Norwegian pear breeding programme |
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| Authors: | S H Hjeltnes |
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| Institution: | 1. Ullensvang Research Station, Substation Nj?s, N-5840, Hermansverk, Norway
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| Abstract: | Summary In the Norwegian pear breeding programme selection is based on evaluation of 20 fruit samples together with field observations
of precocity, productivity and resistance to biotic and abiotic factors. Fruit weight is recorded in grams, and then transformed
to a scale of 20 gram classes. Appearance, shelf life and flavour are recorded on a 0 to 9 scale, and observations of shelf
life and flavour are made at 4 defined intervals following ripening at 20 °C. The final index is made by summarizing the scores
of fruit size and appearance, mean score of internal breakdown, mean score of flavour, maximum score of flavour and scores
of precocity, productivity and resistance. All parameters, except mean flavour, are given a weighting of one, mean fruit flavour
is given a weighting of 2. Data for 160 seedlings evaluated in 1992 is presented. |
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| Keywords: | Appearance fruit quality fruit size index pear breeding Pyrus communis shelf life |
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