Fasoulas, A.C. (1983) Rating cultivars and trials in applied plant breeding. Euphytica , 32 (3). pp. 939-943.
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Abstract
The number of means ‘m’, from which a particular cultivar differs significantly, is used to arrange cultivars in order of descending superiority. For n cultivars under study, the maximum ‘m’ value corresponding to the best cultivar is n-1, indicating that it exceeds significantly the n-1 other cultivars, and the minimum zero. Because ‘m’ represents an objective and reliable statistical measure of cultivar performance, it has been used to calculate two indexes: (1) performance index, P=100 m/(n-1), giving the percentage of means which a particular cultivar exceeds significantly, and (2) differentiation index, D=200 Σm/n (n-1), giving the percentage of paired comparisons between cultivars that show significant differences. Rating cultivars according to P across years (Py), sites (Ps), and years plus sites (Pys), gives an overall picture of the relative superiority of the entries. Rating trials according to D allows comparisons between trials and offers the possibility when the same sets of entries are compared each year across sites, to identify sites that give maximum differentiation.
| Item Type: | Article |
|---|---|
| Additional Information: | SNNigam Collection |
| Uncontrolled Keywords: | Cultivar performance index,trial differentiation index |
| Author Affiliation: | Department of Genetics and Plant Breeding, Aristotelian University of Thessaloniki, Greece |
| Subjects: | Statistics and Experimentation Crop Improvement |
| Divisions: | General |
| Depositing User: | Mr B Krishnamurthy |
| Date Deposited: | 25 Sep 2013 08:27 |
| Last Modified: | 25 Sep 2013 08:27 |
| Official URL: | http://dx.doi.org/10.1007/BF00042176 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/11799 |
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