PJB-1972-1
THE GENETICS OF FLOWERING TIME IN RAPHANUS SATIVUS L. H. GENOTYPE- ENVIRONMENT INTERACTION
AHSAN A. VAHIDY[1] AND RICHARD W. HARTMAN
Abstract
The genotype-environment interaction for flowering time in Raphanus sativus was studied by 'rowing 10 Early, 2
Check, and 10 Late lines in a
Randomized Complete Block Design at two locations luring two times of year. Data on 50 percent flowering time were found to be significantly heterogeneous or the four plantings. However, the data became homogeneous after transformation based on the performance of Check lines in the individual plantings. The effects of the transformation are described and justification for such a transformation is
discussed. Breeding lines were grouped, based on heir pedigrees, in four different ways. Analyses of variance of transformed data were done for each type of grouping, separately for the individual plantings as well as combined for all four plantings. The magnitudes of the various variance components were
quite different for Early and Late lines. The combined analyses of variance for Early and Late lines nullified some effects that were quite significant in the separate analyses. An attempt has been made to identify the possible
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