  We construct a large sample of gamma-ray blazars with low-frequency radio
data using the recent released TGSS AD1 catalog at 150 MHz. The radio/gamma
connections of blazars are compared from 143 GHz to 150 MHz. The radio flux
density at all radio frequencies shows strong correlation with gamma-ray flux
for blazars, as well as for the two subclasses, FSRQs and BL Lacs. But the
correlations get worse from high to low radio frequencies, which indicates that
the low-frequency radio emission is the mixture of extended and core components
for blazars. In addition, we find that the correlation between 150 MHz radio
flux density and gamma-ray flux is more significant for BL Lacs than that for
FSRQs. The slope for the luminosity correlation between radio and gamma-ray
also get flatter than unity at 150 MHz. These results indicate that the core
dominance at 150 MHz for BL Lacs is larger than that for FSRQs. We also compare
the radio luminosity from direct TGSS observation and the extended radiation at
150 MHz for blazars. The results show that the ratio between core and extended
component at 150 MHz is about 1:1 on average.
