Effects of reduced plant height on breeding requirements and ...

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Conrronents o{ Variance and. Heritabilitv Estimates
Means, estimates <strong>of</strong> the cornponents <strong>of</strong> variance, and
heritability estimates for ten agrononic parameters in each
<strong>of</strong> the three populations ¡ C-fO-l, C-?O-Z and C-l0-J are
presented in Table ?" Significant genetic variance ((lfr)
existed for all traits in each population, except for yield
in C-?0-3,
Significant genotype x location x year tO.frr" I interaction
variance components exÍsted for a number <strong>of</strong> pararneters
in each population. fhe onlytF!r" which wes l-arger than the
genotypic conponent was for yield in C-?t-Z, but this did
not detraet frorn the significance <strong>of</strong> the genetie variance.
fhe only other traits for which Ofr", was consistently large
were percent plunrpness in the first two poputr-ations and test
weight in populations C-?0-1 a.nd. t-?O-j. Rasmusson and
Glass (1967) reported significantCfr" for percent plurnp-
ness and heading date.
ïn general, where no significant seeond order interaction
existed, at least one <strong>of</strong> the first order interactions
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