Utilization of yield variance components in series of pre-registration winter wheat trials
Tadeusz Drzazga
kobierzyce@nasiona.com.plHodowla Roślin Rolniczych – Nasiona Kobierzyc (Poland)
Paweł Krajewski
Instytut Genetyki Roślin PAN w Poznaniu (Poland)
Abstract
The genotypic and environmental variation of winter wheat grain yield was assessed on the basis of early and late pre-registration trials conducted in Poland from 1991 to 2007. It was observed that the genotypic variance was not related to the mean yield level. The genotype - by - environment interaction variance was negatively related to the yield, which suggests that significance of the interaction in adverse seasons has increased. The genotypic variance in relation to the interaction variance was low, which means that the possibilities of selection of stable genotypes with broad adaptation were limited. The estimates of variance components and the computed coefficients of variation were used to assess the suitability of the experiment locations. The results can be used to optimize of the series of trials in the breeding programme.
Keywords:
genotype-environment interaction, variance components, grain yield, winter wheat, broad and narrow adaptationReferences
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Authors
Tadeusz Drzazgakobierzyce@nasiona.com.pl
Hodowla Roślin Rolniczych – Nasiona Kobierzyc Poland
Authors
Paweł KrajewskiInstytut Genetyki Roślin PAN w Poznaniu Poland
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Copyright (c) 2008 Tadeusz Drzazga, Paweł Krajewski
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