| The different varieties of virus free potato plan
tlets were selected as the meterials, and using the method of randomized block d
esign of two factor to study the effects of genotypes and different antibiotic
concentrations on the fresh weight of shoot and root, the dry weight of shoot an
d root, leaf number, node number, plant height, stem diameter, root length and r
oot number of individuals after 14 d culture. Our results showed that genotypes
had significant effects on the ten agronomic traits (P<0.05). Four kinds of
antibiotic concentrations（0、20、40、60 mg·L-1）had notable interacti
on effects on other agronomic characters eccept stem diameter (P<0.05), the
suitable antibiotic concentrations were 0 mg·L-1 and 20 mg·L-1. Ex
cept for leaf number and root length properties index, the genotypes and antibio
tic concentrationshad notable interactions on other agronomic characters eccept
(P<0.05). The suitable antibiotic concentrations for the early maturing va
rietie “Atlantic”, medium maturing varietie “Kexin 1” and late maturing va
rietie “Qingshu 168” were 0 mg·L-1 and 20 mg·L-1, to prevent the
pollution and production reduction, we suggested to add 20 mg·L-1 antibi
otic if subcultured for 3-5 generations. |